6l80 Harsh Downshift

My question is has. The tranny would hold onto gears and refuse to downshift unless you planted the accelerator. - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. Chevy Colorado Automatic Transmission 6-Speed 2017, Lube Pump Kit by Remco®. The transmission may fail to engage in any gear. GM 6L45, 6L50, 6L80 and 6L90 units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. From GM: "What you are probably feeling with your coasting downshifts is that we are leaving the torque converter applied during the shifts. some of the wiring could be getting too close to metal grounds and you could be getting a messed up computer signal. I pulled over, turned the ignition off and on again, and the truck operated normally. Any input from the accelerator decouples the TC friction clutch, and the transmission reverts to a fluid drive scenario with torque multiplication. One possible explanation is that the “adaptive transmission shift strategy,” which is intended to improve shifting quality, actually worsens the shift quality for several days after the adaptive strategy. check my post on 1990 Silverado 1500 starting problem for. Nevertheless, the same with other problems in your vehicle, there are also early warning signs that will let you know if the automatic transmission is about to fail. That is really fun and not the problem i am seeing. 104984-01 OE Part No: 24238700 GM 6L80/6L90 1-2-3-4 pistons commonly crack due to cantilevered stress on the cast material. Also, the 6L80 has a "tap up/tap down" capability that allows the driver to manually select upshifts and downshifts with a button on the column shifter. Selling a GM 6L80 transmission. Trans has one light season of runs since rebuild, no street use. Ford 6R60/75/80 (ZF6HP26) Forward Clutch (A) O. It has a wide, 6. Finally got someone from Weber Transmission to get it to duplicate the harsh upshifts as they call it, come to find out that the last time they "flushed" the tranny fluid, that the sediments werent completely flushed. The new powertrain combination helps the 2008 H2 and H2 SUT deliver an additional 1,500 pounds (680 kg) in towing capacity – an increase from 6,500 pounds (2,948 kg) to 8,000 pounds (3,629 kg). Most 4wd 6L90Es have 29 splines and the 2wd version have a larger 36 spline. The 2-3 shift might be a little more crisp from the corvette servo releasing. This is a 4 speed trans that has been converted to a 5 speed by turning on the od unit ( 1-2 shift ) in first gear. Upshifts at light throttle were fine, but God forbid if you have to drive in and out of traffic, on and off the throttle. the problem can return in days, weeks, or even months. It is important to follow strategy-based diagnosis and check eSI for the latest bulletins and PIs. The long-travel clutch is direct and easy to operate smoothly, and after a few miles, you feel largely at home, ripping off glasslike, whomping downshifts without a second thought. Equipped with 6l80 (rpo myc) automatic transmission. pdf), Text File (. TRNW members interact on everything from rebuilding tips, diagnostic help, troubleshooting, parts locating, and the art. ZL1 6L90E harsh down shift My 6L90E is downshifting in manual mode really harsh the most notiable being the 3RD to 2ND down shift , in normal auto everything is fine it only does it in Maui all mode , would anyone have any idea what needs to be done to smooth the downshift out so it doesn’t want to throw my head forward on down shifts. My transmission works properly in all gears on level roads. would require rigid stradle mountings in place of the overhung mountings currently on the pl. 3 and the so what I thought badass hydramatic 6 speed. The annoying thing in disallowing pass-thru-N down shifts is that in regular drive mode, it goes 6-5-2 (or3) and the step is delayed. I`m running 3;73 gears and a 4L60E. The most common issue with the Ford 6R80 is hard downshifts. txt) or read online for free. Clunk Noise or Harsh 6-5 Downshift at 50 - 70 MPH Harsh 4-3 Downshift or Harsh 3-2 Downshift at Lower Speeds 2012 & Prior - All 01-07-30-042G Information on 2-3 Upshift or 3-2 Downshift Clunk Noise 2012 - All PIP5009E Replace The Internal Transmission Wiring Harness And TCC Enable Solenoid Anytime The Transmission Is. GMC Yukon owners have reported 48 problems related to automatic transmission (under the power train category). I reset the codes and now It's shifting hard from 1st to 2nd and 2nd to 3rd. Ben Collins (the former Stig) actually advises doing while driving on the street. The transmission itself operates completely differently. (866) 812-7560. Clean the air flow sensor also, check the minimum air rate, reset if needed, then reset the ECM and roadtest if the check engine returns with the same code, check the ECM's sensor voltage to that sensor, if the ECM's voltage is at 5 volts or just slightly below at the sensor then check the sensor ground if it checks good then replace the sensor. A faulty shift solenoid can cause the transmission to downshift uncontrollably (in other words at random times) or not downshift at all, even when coming to a complete stop. The transmission may stay engaged in a higher gear for an extended period of time when it should be downshifting. 5*, making for a nice shift that is not too harsh on the transmission. But one thing about the Z06 that confused and upset a lot of purists was the announced availability of an 8-speed automatic, and a traditional torque-converter-equipped one at that. safety standards. Both Shift Solenoids A and B are located toward the rear of the Transmission. A large amount of driveability concerns on a cammed auto car typically come down to 2 factors, the tune and the converter. The ZF 6HP26/6R60/6R80 6-Speed automatic transmission, manufactured by ZF Getriebe, has found its way into a wide range of vehicles, from BMW's to Range Rovers, Jaguar's, Rolls Royce's, and a wide range of Fords. The leading source for online automotive repair information is a single vehicle access of this same information including all the diagrams, repair information, and detailed technical service bulletins/recalls for your 2007 Cadillac. HARSH/ROUGH 2-1 DOWNSHIFT CONDITION. Overly firm up/downshift feel or harsh engagement can be a sign of deformed accumulator piston bumpers in listed units. Refer to Workshop A HARSH/ROUGH 2-1 SHIFT CONDITION IS Manual section 307-01. The 6speed is a little fickle with tunes to me. 6L80E harsh 2-1 downshift. The tranny would hold onto gears and refuse to downshift unless you planted the accelerator. GMC Yukon owners have reported 48 problems related to automatic transmission (under the power train category). Finally got someone from Weber Transmission to get it to duplicate the harsh upshifts as they call it, come to find out that the last time they "flushed" the tranny fluid, that the sediments werent completely flushed. For Powertrain Warranty Coverage, the following describes inclusions and exclusions:Transmission/Transaxle Coverage Includes: All internally lubricated parts, case, torque converter, mounts, seals and gaskets. It was an 07 gmc sierra with the 6l80e automatic. Harsh Subaru downshift Posted on TCM reprogramming files are now available to rectify a harsh downshift on 3-2 downshifts while slowing to 12-14 mph and then. Once at operating temp this shift was fine. THe really hard 2-1 downshift would sometimes be replaced with a harsh bump about 2 seconds after I had come to a stop. It is based on the ZF 6HP26 transmission and is built under license by the Ford Motor Company at its Livonia Transmission plant in Livonia, Michigan. As previously stated, Pat G is the damned 6L80 king. 6L80 Intermittent Harsh Downshift, Chuggle or Shudder During Deceleration 5. Once the road has leveled off, I may move the gear shift from 2 to D. Overly firm up/downshift feel or harsh engagement can be a sign of deformed accumulator piston bumpers in ZF6HP19/26/32 (Generation 1), ZF6HP21/28/34 (Generation 2), ZF8HP45/55/70, and Ford 6R60, 6R80 units. light duty trucks for 1991. 94 is a one year only trans in that it still used the shift shaft for old style mechanical shift linkage, had no bosses for a NSBU, but the new style wiring harness and lockup setup in the valve body. When I take my foot off of the accelerator for a couple of seconds, the transmission immediately wants to downshift. Trans has one light season of runs since rebuild, no street use. the problem seems to go away after that until next time. 6L80 transmissions are a pain to tune and even harder on trucks. How to check transmission fluid in Ford 6R75 and 6R80 2007+ Expedition, 2009+ F150, 2011+ Mustang 6-speed automatic Those of you with the 6R75 or 6R80 (Ford's newer 6-speed auto transmission found in 2007+ Expedition and 2009+ F150) may have been slightly alarmed when you popped the hood for the first time and can't find a transmission dip. The above is the cause. Dealer said that this is programmed in to stop ppl floggin cold cars, and that they could remap the shift points etc. Edited April 25, 2017 by Dunc. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software malfunction. Repeat as necessary in each gear (8, 7, 6, 5, 4, 3 and 2). Drove 10 hours this weekend and noticed on occasion if doing say 60mph and I needed to quickly pass someone at near WOT, it will downshift several gears with a very loud and violent bang. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. Rough downshifts seem to be a trait of the Hydra-Matic 6L80 6 speed Automatic transmission (MYC), been to the dealership and drove a few new trucks after experiencing it in mine and they all had the same shift trait. My trucks got only 25000 miles on it and is having hard downshift, premature upshifts, surges when slowing about once a week, and has a slow shift from 2nd to third every morning. [Archive] Page 3 Discuss the 4L80/85E transmissions found in the 6. The G37s VQ37VHR engine has been touted by car magazines and reviewers as an improvement over the VQ35HR engine mostly adding much more refinement and smoother engine operation, especially at high rpm where the VQ35HR engine was frequently criticized for NVH and sounding strained, harsh and loud. Any input from the accelerator decouples the TC friction clutch, and the transmission reverts to a fluid drive scenario with torque multiplication. You always want the knock retard to read zero under wide open throttle conditions, it is normal for it to show some KR when stomping on the throttle and also during the shift. GM 4L80E Transmission Lockout Problem: Fred T. This also occurs while shifting (if any), as such a shift would be very harsh wihout the fluid damping effect of the TC. 11-27 toyota u250 harsh 5-4 downshift 11-29 bmw/jaguar zf5hp24 repeat a clutch drum failure 11-30 toyota a245/246 harsh forward engagement 09-37 4l30-e various internal electrical component codes stored 10-01 nissan re4ro1a anti-rattle clip location 10-02 gm/bmw/isuzu 4l30e 4th gear starts, harsh 3rd gear or harsh downshifts. Usually between 40-50mph it feels exactly like when you downshift in a manual with the purpose of slowing down, except in this case 90% of the time I am wanting to coast and the downshift is super obnoxious. Introduced in 1939 for the 1940 model year vehicles, the Hydramatic was the first mass-produced fully automatic transmission developed for passenger automobile use. This worked out very well with the added low end torque, now it doesn't need to unlock for mild inclines on the highway like it used to (let alone downshift to 3rd). Pan drop, clean, complete flush with 12 quarts of M1 ATF (older multi-vehicle formula) 2005 G35 100K Looked like original fluid so I did 2 partial drains over the past 2 months with SuperTech ATF+4 and added 6 ounces of Auto-RX prior to complete flush. driveline clunk Aug 14 2013, 1:14am So I took my 2009 Sierra (5. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Updated and Upgraded. List of 2013 CHEVROLET SUBURBAN Factory Technical Service Bulletin - TSB | AutoCodes. 4" (35mm) longer than the 6L80 case. the 2-3 shift is busy because the od band is coming off causing the od unit to transfer back to 1:1 and the intermediate band is coming on. Power Downshift Adaptive Learning: Starting with the vehicle operation in 8th gear, slowly apply pressure to the accelerator pedal until downshift occurs. The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. I’ve used GM’s 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. I'm playing with settings to accomplish a good WOT upshift, quick downshift, and smooth regular upshifts with my Trailblazer 5. Some like a manual valve body on the street, others say they are to harsh shifting for their taste and/or want their automatic to work like an automatic not a clutch-less 3 speed. I own a 2006 Z06 with very little mileage, approximately 1,200 miles. downshift to the next lower gear, and will downshift into second gear after the vehicle decelerates to a vehicle speed that will not create an engine overspeed condition. Let off for upshifts, let off a little less for (manually forced) downshifts (engine power helps keep the trans from having to accelerate the engine with a slipping clutch pack). I have a 2001 Tahoe I just picked up from a friend. Types of VCM Controls. 6L80E Transmission, 6l80e Welcome to the official 6l80e transmission website. Like the Snap On tool or a GM Tech II can do it. Any input from the accelerator decouples the TC friction clutch, and the transmission reverts to a fluid drive scenario with torque multiplication. And you have to understand the causes of automatic transmission shifting hard. The V-8 automatic is a 6L80, said to be “the highest capacity automatic ever in a GM passenger car. One incident of 1st to 3rd shifting on side streets after exiting the highway (no codes). Kind of lazy to downshift unless you floored and hit the kick down switch. Performance Automotive and Transmission Center has developed a full line of billet torque converters with lock-up for General Motors, Ford, and Dodge transmissions for applications ranging from improved factory performance. i am aware of the sporty feel this truck has and the rev matching when down shifting. Overly firm up/downshift feel or harsh engagement can be a sign of deformed accumulator piston bumpers in listed units. • Harsh 2-3 shifts that are more likely to occur at less than 50% tp. More Cadillac Escalade Torque Converter Service Bulletins of Other Model Years. Sonnax Transmission parts for GM 6L80 applications. 6L90 discussion. Hard to get used to. Forward Planet C 2WD Only 10 11 44 44 34 31 33 101 102 100 1 86 Case Valve Body Solenoids Oil Pan and Filter Manual Linkage E-Module Case Connector 150 148 2013. 3 and the so what I thought badass hydramatic 6 speed. ATF has lubricants, protectants and detergents that protect the transmission and keeps it in good working order. And you have to understand the causes of automatic transmission shifting hard. Transmission Shift Solenoids. It's not slipping, it's just changing into gear kind of hard. Home › Forum › GMC › 2016 Sierra Shifting Problem 6 speeed automatic This topic contains 24 replies, has 20 voices, and was last updated by Velvet01 6 months, 3 weeks ago. The complaint of harsh upshifts and downshifts is being addressed by replacing the valve-body assembly - all accessible without having to remove the transmission. I've used GM's 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. Would like to hear opinions from others. I'm playing with settings to accomplish a good WOT upshift, quick downshift, and smooth regular upshifts with my Trailblazer 5. In sport, that 45 MPH shift would be 5-2 in one jump as. September 2012 Prior to beginning any repairs, it's critical to always follow Strategy-Based Diagnostics and check the appropriate Service Information for any bulletins or PIs that may apply. Is this something that can be taken care of - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. ZL1 6L90E harsh down shift My 6L90E is downshifting in manual mode really harsh the most notiable being the 3RD to 2ND down shift , in normal auto everything is fine it only does it in Maui all mode , would anyone have any idea what needs to be done to smooth the downshift out so it doesn’t want to throw my head forward on down shifts. In this version of the tune, I turned off all torque management on upshifts, but kept it enabled on downshifts because it's too harsh on heavy throttle kick-downs, and it's not really doing anything for performance. The check engine light came on. I replace them all the time in 6l80/90 gm transmissions for harsh delayed gear engagement. I've used GM's 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. 88s but with a lower 70 mph cruise RPM. TRNW, Transmission Rebuilders Network Worldwide. Not sure if that's the same as the clunk that the OP is referring to. Most stock OE type rebuilds for this application only live for about 20-40K miles until the problems resurface. hi texas driver, have your next dealer check all wiring to transmission is isolated. if i stop, say at a stop light, turn the car off, then press the brake and run the shifter through each of the gears, twice, turn the car on, it stops. Finally got someone from Weber Transmission to get it to duplicate the harsh upshifts as they call it, come to find out that the last time they "flushed" the tranny fluid, that the sediments werent completely flushed. Single Shot: This type of command is a one click deal. 2-24-08 : GM 4L80E Transmission Problem: I have a 2000 model old style Chevy 3/4 ton with 350 engine and 4l80E transmission. Equipped with 6l80 (rpo myc) automatic transmission. com Hydraulics Fundamentals: Accumulators & Shift Feel - Transmission Digest. Results: After installation of the Zip Kit, I am getting short crisp shifts in all gears. GM 6L80 Automatic Transmission. The sun gear’s rotational direction is reversed by the planet carrier (10), which is held by the BR brake. Average failure mileage is 24,400 miles. The NAG1 (WA580 or W5A580) automatic transmission found in many Chrysler products is an electronically controlled 5-speed transmission system with a lock-up clutch in the torque converter. Harsh shifts in 3'rd and 5'th gear; Slipping transmission in-between shifts; When this plate goes bad, it allows the piston to leak and not properly apply the gears. Truck has 80K and transmission was serviced at 60K by GM dealer. FORD: 2009 F-150 ISSUE Some 2009 F-150 vehicles equipped with 5. - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. I’ve used GM’s 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. HARSH/ROUGH 2-1 DOWNSHIFT CONDITION. The CEL remained on for the next several ignition cycles. It's gotten to the point where it waits so ridiculously long to downshift that the truck starts to convulse and shake like it's going to die. GM trannys never set a Check Engine Light (at least not on OBD II cars like the OP has). Read more only at www. The customer may also. But understanding what could be wrong and then determining what would be involved to get it repaired (or if it even makes sense to try to get it repaired instead of swapping it out for a re-manufactured transmission), is what this article is all about. The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the "A" and "B" solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later). At first it alarmed me a bit, as it does seem to hit pretty hard sometimes when it happens. Fortunately, because the 5L40-E has been around for some time, a lot of the faults you're likely to find are well. In our opinion the 6L80/6L90 is kind of a weak design, and isn't really suitable for high horsepower racing use. Shifting into drive or reverse, we expect our vehicle to start moving. An upgraded pump with machined pump body mating surfaces and a resurfaced pump rotor to maintain proper fluid pressure To prevent front seal leaks, premature bushing wear, and vibration, all remanufactured 6L80E torque converters come with an updated stator support shaft and seal rings,. Refer to Workshop A HARSH/ROUGH 2-1 SHIFT CONDITION IS Manual section 307-01. I believe it's when the torque converter is locked up for fuel economy and the transmission makes the downshift to third while the torque converter is still locked, so it does not happen often. Drove 10 hours this weekend and noticed on occasion if doing say 60mph and I needed to quickly pass someone at near WOT, it will downshift several gears with a very loud and violent bang. (866) 812-7560. Find 2015 Chevrolet Silverado 1500 recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed. The 45RFE transmission is a five speed automatic transmission however when you drive the vehicle you will actually have 4 gears and lock up. Is this something that can be taken care of - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. An example of this command is the Reset Fuel Trims. HARSH/ROUGH 2-1 DOWNSHIFT CONDITION. Here is a picture of the valve body. Comes with complete, easy to follow instructions. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. It is, by most accounts, a great driving experience. Pan drop, clean, complete flush with 12 quarts of M1 ATF (older multi-vehicle formula) 2005 G35 100K Looked like original fluid so I did 2 partial drains over the past 2 months with SuperTech ATF+4 and added 6 ounces of Auto-RX prior to complete flush. Hey guys, steve here. TCC disengage (downshift) occurs at a throttle position angle of 60 degrees, independant of speed. 6L80/6L90 (MYC, MYD) 1-2-3-4 Slip Condition, Possible No movement Forward CONCERN: 6L80/6L90 (RPO MYC, MYD) applications built before June of 2010 may exhibit a slip condition related to the operation of the 1 -2-3-4 clutch. The transmission itself operates completely differently. Then, an abrupt down shift and if I'm not careful the rear wheels start to break loose. A4 4l60e Trans won't shift out of 1st gear. Experiencing hard downshift in automatic transmission at less than 15 mph. Results: After installation of the Zip Kit, I am getting short crisp shifts in all gears. This is exactly what happens with mine. Note the position of the Planet Support Spring. The planet gears (PL6) rotate around the sun gear (11). A transmission that has been excessively run on low fluid probably has internal damage. More Cadillac Escalade Torque Converter Service Bulletins of Other Model Years. In some vehicles equipped with a “CVT” transmission, owners may experience transmission issues that may include…. One other thing I notice are the downshifts seem harsh when the truck is slowing down to a stop. Our electronics and adapters will support a 6L80e or 6L90e but with a 6L90e you may need to modify the trans bracket to accommodate the extra length and verify what output shaft spline count you have. This condition may be present in more than one forward gear or if. Sonnax accumulator piston kit 95740-15K restores hydraulic damping with improved service life. 2009 Silverado Trans Slip Silverado Car Forums. Easy fix on rear of transmission, but xmember must come out to access VSS. This procedure will learn the off-going clutch adapts for desired power downshift control. SOURCE: 2002 Ford Explorer 5R55W transmission had Band adjustment is very sensitive on these units, I set both adjustments at one turn. The Aisin Warner AW4 transmission is an automatic shift, four-speed overdrive transmission used in the 1987-2001 Jeep XJ Cherokee and MJ Comanche models. An upgraded pump with machined pump body mating surfaces and a resurfaced pump rotor to maintain proper fluid pressure To prevent front seal leaks, premature bushing wear, and vibration, all remanufactured 6L80E torque converters come with an updated stator support shaft and seal rings,. GM Authority is. These are commonly referred to as "garage shifts". GM 6L80 Automatic Transmission. The GM 5L40-E transmission is very common in cars of a certain age and, as those cars continue to age, more and more of them are finding themselves in the shop for transmission faults. “A harsh shifting auto is often a longer lasting one. Shift, clutch and performance conditions that result from wear at the pressure regulator valve bore or associated boost valve cannot be corrected by replacing the valve body. MANUAL DIAGNOSTIC PROCEDURES. In this article, I'll show you how to test the transmission shift solenoids (specifically 1-2 solenoid and 2-3 solenoid) on your GM 4. An upgraded pump with machined pump body mating surfaces and a resurfaced pump rotor to maintain proper fluid pressure To prevent front seal leaks, premature bushing wear, and vibration, all remanufactured 6L80E torque converters come with an updated stator support shaft and seal rings,. This is why WOT downshifts are harsh on the transmission. 2 quarts of M1 75W90 in diff. Having problems with your Grand Prix or Impala transmission? We have several common problems for the GM 4T65E listed here and also offer Rebuilds and Parts. I have a 2001 Tahoe I just picked up from a friend. Hydramatic (also known as Hydra-Matic) is an automatic transmission developed by both General Motors' Cadillac and Oldsmobile divisions. OH-58 Helicopter Transmission Failure Analysis. The applied K3 clutch connects. On a recent road trip, the 6-speed automatic (6L80E) transmission stumbled during the 2-3 shift while driving through the mountains and went into a failsafe mode. For a long time BMW have used General Motors automatic transmissions in various models. The video shows the replacement of the 1-2. Hunting: A repeating quick series of upshifts and downshifts that causes a noticeable change in engine RPM, such as a 4-3-4 shift pattern. This position can also be selected at any vehicle speed to provide improved engine. If the mode switch is open, pushing either the upshift button or downshift button will put you in manual mode (and pushing both OR switching the mode select switch to auto will put you back in auto mode). I had very similar problems in a different truck. HARSH/ROUGH 2-1 DOWNSHIFT CONDITION. [Archive] Page 3 Discuss the 4L80/85E transmissions found in the 6. TRNW members interact on everything from rebuilding tips, diagnostic help, troubleshooting, parts locating, and the art. As I start to get closer and closer to my CTS-V purchase and the eventual modifications, I am hoping I can get some information on the limitations of the OEM transmission and driveline and if there are any aftermarket solutions for these components. Many mechanics have failed to repair. But one thing about the Z06 that confused and upset a lot of purists was the announced availability of an 8-speed automatic, and a traditional torque-converter-equipped one at that. So in most vehicles, a downshift to 3rd would uncouple the TC clutch. Discuss it at Forum. Mine will occasionally give a very firm downshift at slower speeds, usually when I'm hard on the brakes. Technical Bulletin Listing 2007 November 4T65E 732B 1 Updated Transmission Fluid Pressure Switch A4BF1 1137 1 Reoccurring PCS Circuit Code 748 F4A21-1, F4A33, F4A42, A4AF3, A4BF1 1138 1 Harsh 4-3 Down Shift on Decel to a Stop A4AF1/2, F4A32 1139 1 DTC 1613 or 1614 Stored in the TCM. 00 - Includes New 6L80E Transmission, Free Shipping (within mainland USA), 3 Year Nationwide Warranty, HD Torque Converter. 6L80/90 No 4th, 5th, 6th Gears, Possible DTC P0796 Burnt 2-6 Clutch Delayed Engagement, Slip, Shudder, Clutch Damage Interchange 1-2-3-4/3-5-R Drum Intermittently Neutrals on Launch 8L45/8L90 Harsh Shifts Delayed Engagement, Drops Out of Gear at Stop Signs 8L90 Hard Downshifts, Especially the 3-1 Shift, Possible Flare/ Bump on the Upshift or. The GTS handles and steers as competently as any of the $200,000-plus. A large amount of driveability concerns on a cammed auto car typically come down to 2 factors, the tune and the converter. replacing just solenoids without rebuilding valve body, where accumulators/pistons always go bad after 60-70k, will not get you perfect results, but might improve shifting quality. The purpose of the PWM solenoid is to make the shifts from one gear to another less harsh. GM Authority is. Updated and Upgraded. Service manuals, electrical schematics and bulletins for 1995 to current GM vehicles. This is a discussion on A4 4l60e Trans won't shift out of 1st gear within the Automatic Transmission forums, part of the Drivetrain category; I was hearing some grinding at low speeds in 1st gearthought it was just my brakes rubbing due to the. Forward Planet C 2WD Only 10 11 44 44 34 31 33 101 102 100 1 86 Case Valve Body Solenoids Oil Pan and Filter Manual Linkage E-Module Case Connector 150 148 2013. 6L80 transmissions are a pain to tune and even harder on trucks. 1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. Truck has 80K and transmission was serviced at 60K by GM dealer. The update did make some things better but the symptoms are harsh downshift after a long run at higher speeds (like on the highway, coming down the ramp to a stop at the bottom of the ramp). Sonnax remanufactured valve body GM6L80L has been designed to address common issues, such as: burnt clutches; codes P0751, P0741, P0742; harsh TCC apply; bump, harsh or flare shifts; bind-ups; solenoid performance codes; and wrong gear starts. 6R140 4WD TRANS ASSEMBLY. On/Off: On/Off commands have 3 modes. Auto 8 on my 2. Dealer said it sounded like the slip yoke lube thing, but that due to my date of manufacturer ( 10/10) that it did not apply. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the "A" and "B" solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later). INTRO © 2018 ATRA All Rights Reserved Table of Contents FORD SECTION 6F35 Harsh Engagements, DTC P0C27 74. FORD: 2009 F-150 ISSUE Some 2009 F-150 vehicles equipped with 5. Hey guys, steve here. I`m running 3;73 gears and a 4L60E. Ninth is 0. This Kit Will Not Fit Late 2006 Up Models With 15 Pin or 17 Plugs ( 4L70E ). "Thuds," "clunks," "bangs," "slipping" and "harsh" are all common words used by customers to describ transmissiondigest. I took it to the dealer and had the mechanic drive with me this morning and while he did say that the shifting points felt within spec to him he said he'd be happy to diagnose the body control module and everything and see if it spits out any codes. Any internal damage will require a complete rebuild of the transmission, which typically costs north of $1,500. A transmission that has been excessively run on low fluid probably has internal damage. How to check transmission fluid in Ford 6R75 and 6R80 2007+ Expedition, 2009+ F150, 2011+ Mustang 6-speed automatic Those of you with the 6R75 or 6R80 (Ford's newer 6-speed auto transmission found in 2007+ Expedition and 2009+ F150) may have been slightly alarmed when you popped the hood for the first time and can't find a transmission dip. Rough downshifts seem to be a trait of the Hydra-Matic 6L80 6 speed Automatic transmission (MYC), been to the dealership and drove a few new trucks after experiencing it in mine and they all had the same shift trait. This is exactly what happens with mine. GM 6L45, 6L50, 6L80 and 6L90 units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. 2009 Silverado Trans Slip Silverado Car Forums. 2010 atsg bulletin index 10-01 nissan re4r01a low/reverse anti rattle clip location 10-02 isuzu/honda 4l30-e 4th gear starts, harsh 2-3/harsh downshifts 10-03 ford 500/freestyle/montego "cvt" various noises from transaxle. The most common is losing all forward gears or stops moving forward. The long-travel clutch is direct and easy to operate smoothly, and after a few miles, you feel largely at home, ripping off glasslike, whomping downshifts without a second thought. The transmission may stay engaged in a higher gear for an extended period of time when it should be downshifting. Vehicles built in the January through August, 2007 time frame are more likely to have leaking fluid seal rings Important: When inspecting the 1-2-3-4 and 3-5-R clutch fluid seal rings (230) there probably will not be visible signs that the seal rings are damaged. The OE elastomeric (rubber) bumpers tend to take a set, resulting in loss of hydraulic damping. DTC P0751, P0756, P0776, P0796, P2714, P2723, harsh tcc engagement. GMC Yukon owners have reported 48 problems related to automatic transmission (under the power train category). A new six-speed Hydra-Matic 6L80 RWD electronically controlled automatic transmission backs the 6. 1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. This condition is also defined as BUSYNESS. See 2016 GMC Sierra HD technical service bulletins (TSBs) at TrueDelta, organized by model year and problem area about vehicles that have a harsh shift 1/2 and 2. Most stock OE type rebuilds for this application only live for about 20-40K miles until the problems resurface. BlueDevil Transmission Sealer is specially formulated to restore dried, cracked or shrunken seals and gaskets in your transmission without harming the transmission. 6L80/90 No 4th, 5th, 6th Gears, Possible DTC P0796 Burnt 2-6 Clutch Delayed Engagement, Slip, Shudder, Clutch Damage Interchange 1-2-3-4/3-5-R Drum Intermittently Neutrals on Launch 8L45/8L90 Harsh Shifts Delayed Engagement, Drops Out of Gear at Stop Signs 8L90 Hard Downshifts, Especially the 3-1 Shift, Possible Flare/ Bump on the Upshift or. The most common issue with the Ford 6R80 is hard downshifts. Note the position of the Planet Support Spring. Once at operating temp this shift was fine. Generally, most vehicles are simply used to take people to work, school or shopping so don’t need ATF additives. The Aisin Warner AW4 transmission is an automatic shift, four-speed overdrive transmission used in the 1987-2001 Jeep XJ Cherokee and MJ Comanche models. Or why a 3-2 downshift solenoid shows 0% in 1st to 90% in 2nd, 3rd and 4th and about 6% on a 3-2 downshift, yet with another vehicle it always reads ON and goes to OFF on a 3-2 downshift. Try it on an open loose dirt area. Control over this process resides with the compensator feed regulator valve. Nicaraguan hammocks are made our upbringing and we nylon string that if the marriage is glow-in-the-dark realizations). The Manual Low Gear position provides 1st gear operation only. 2004R Transmission Shift Kit 004R automatic overdrive transmission. downshift to the next lower gear, and will downshift into second gear after the vehicle decelerates to a vehicle speed that will not create an engine overspeed condition. Pan drop, clean, complete flush with 12 quarts of M1 ATF (older multi-vehicle formula) 2005 G35 100K Looked like original fluid so I did 2 partial drains over the past 2 months with SuperTech ATF+4 and added 6 ounces of Auto-RX prior to complete flush. #1 - Harsh or Delayed "Garage Shifts" One of the most common signs you have a problem with your transmission valve body is a delay (2 or more seconds) or harsh shift when shifting from Park to Drive or Park to Reverse. Results: After installation of the Zip Kit, I am getting short crisp shifts in all gears. The PA70411 has 35% more apply area than the Corvette servo. Did not fix it Today my tranny went out again i was slowing down for a red light I started hearing that whining sound that I did the first time this happened. Forward Planet C 2WD Only. The Ford 10R80 also has three overdrive gears, which it can downshift from very quickly. Once at operating temp this shift was fine. I have a 2007 2500 hd with 6. GM 4L80E Transmission Lockout Problem: Fred T. At the first corner of my road test, not 10 feet out of General Motors' parking lot, the rear end is already slewing sideways like a drunken sailor. This Kit Will Not Fit Late 2006 Up Models With 15 Pin or 17 Plugs ( 4L70E ). Learn how to diagnose a transmission that's shifting roughly here. I had very similar problems in a different truck. Even after a new transmission was installed for me I had very harsh downshifts. Through ample use of aluminum and even some magnesium (a first for GM automatics), the new 8L90 weighs eight pounds less than the six-speed 6L80 it replaces, so curb weights should not increase. GM 4L80E technical information The 4L80E transmission is a four speed automatic with torque converter clutch. Generally, most vehicles are simply used to take people to work, school or shopping so don’t need ATF additives. 700r4 4l60e 4l65e sonnax 2nd. Desired Shift Time If this is your first visit, be sure to check out the FAQ by clicking the link above. Shifter Doc sells restored OEM Hurst Shifters, new Hurst shifters and Shifter Installation Kits, including some out of production items that Hurst manufactures exclusively for us. FORD: 2009 F-150 ISSUE Some 2009 F-150 vehicles equipped with 5. I am not in the automotive field and do not drive a ford but feel your pain and wanted to add what little info I have. The six-speed automatic has a wide, 6. Since the job of the accumulator is to cushion the shift, any leakage here will cause harsh shifting. This is Technical Service Bulletin and Automotive Recall Titles. TCC disengage (downshift) occurs at a throttle position angle of 60 degrees, independant of speed. When the transmission shifted, the timing was reduced to 7. com customer concern on a harsh (detent) 6-4 downshift. This Kit Will Not Fit Late 2006 Up Models With 15 Pin or 17 Plugs ( 4L70E ). Once way I would suggest to fix the issue would be to adjust the power downshift times in the tune (HP Tuners or EFLive) but to leave the Torque Management "Enabled" as this allows the TCM to help achieve the desired shift times and also helps protect your box. Sonnax accumulator piston kit 95740-15K restores hydraulic damping with improved service life. BlueDevil products are safe for your vehicle and can remain in the system until your next fluid change. But one thing about the Z06 that confused and upset a lot of purists was the announced availability of an 8-speed automatic, and a traditional torque-converter-equipped one at that. The 45RFE transmission is a five speed automatic transmission however when you drive the vehicle you will actually have 4 gears and lock up.