So I'm likely going to send the hub and the shaft in to Dave at tripleedgeperformance. I'm guessing some gunk clutch mud? This book has 120 pages of detailed information about individual model ratios, oil passage identification, diagnostic trouble codes, transaxle end play measurements, line pressure checks and a range of component rebuilds, including drive sprocket, case cover and accumulator housing assembly. Some of those changes are indicated in this manual and some are not. Over time the solenoids will burn up and fail. However, words comm only associated with the specific transaxle or transmission function have been defined in a Glossary rather than within the text of this book. A transmission will not last forever, regardless of how well you take care of it.
Since there is a wide range of repair procedures and technical specifications specific to certain vehicles and transaxle models, the proper service publication must be referred to when servicing the Hydra-matic 4T65-E transaxle. It was designed for cars where the engine was transversely mounted. Note: There have been many engineering changes in this transmission since its introduction. It is also all-wheel drive capable. It served duty in the Pontiac Grand Prix, Montana, Aztec, Bonneville, along with the Chevy Lumina, Monte Carlo, Venture, Malibu and Impala, and a handful of Buick and Oldsmobile models. The Volvo models listed had an optional Gear-Tronic version which provided manual shifting typically found on the turbocharged models. It is crucial to get these lip seals seated properly, so that they sit in the groove with the lip sticking out all the way around.
Later model transmissions were equipped with hardened shafts that help reduce the occurrence of this problem. Do you have a 4t60 Trans or a 4t65? If you leave the shifter in 1st will it shift all the way up to drive on its own? Some contact cleaner:And replace the membranes and these switches are now as fast as the normally open switches. Cracked open the filter with a hammer and chisel:Only some fine clutch mud, no metal particles. For clarity this manual will address the disassembly and assembly procedures for the 8L90 and is intended for use by the professional technician. And I wasn't careful with removing the retaining ring, and it curled back in somehow and scratched the crap out of the brass bushing:I have no means of replacing the bushing, and the spring assembly is fubared. Common problems with the 4T65E are as follows: Solenoid failures: The transmission is controlled by electrical solenoids that receive a signal from the computer telling it when to shift. The problem is that once you have gotten your nifty new product, the gm 4t65e transmission repair manual gets a brief glance, maybe a once over, but it often tends to get discarded or lost with the original packaging.
The third major section of this book displays the section of this book provides additional transaxle information regarding lubrication circuits, seal locations, illustrated parts lists and more. However, this book is not intended to be a substitute for other General Motors service publications that are normally used on the job. All the brass bushings except the one I messed up and subsequently replaced look great. The transmission in this manual was disassembled and reassembled without all factory tools, if all factory tools are used, the transmission would be assembled differently than shown in this manual. Wiring Harness: Screwed that puppy up; all the little plastic retaining clips to the solenoids were very brittle, and as careful as I tried to be I broke every last one of them:This harness will find use as part of a solenoid test apparatus. The 4T65E originated from the early three speed. This heavy duty version was designed toand high output turbo charged V6 engines.
T echnicians or other persons not having automatic transaxle or transmission know-how may find this publication somewhat technically complex if additional instruction is not provided. . I did not do this rebuild, I found the information to do this and wanted to let everyone know how to do this. The Master kit will have new Borg Warner 3rd clutches. The three planetary gear sets provide five forward speeds and one reverse speed. They differ from a rebuilt transmission in the fact that they are as good as a new transmission at a greatly reduced price and often include modifications and upgrades that make them much more durable. The 4T65E is also referred to as a transaxle, meaning the transmission and drive axle assembly is housed in one case.
Note: There have been many engineering changes in this transmission since its introduction. Operational theories of the mechanical, hydraulic and electrical components are presented in a sequential and functional order to better explain their operation as part of the system. The transfer of torque from the engine through the transaxle is graphically displayed on a full page while a narrative description is provided on a facing half page. Pan Gasket in excellent shape after cleaning, and can be reused. Transmission Range Switch: This is the one that sits on top of the trans case, right where the shifter cable attaches.
This is a fix to the problem the Author had when he needed to have this tool to have more length. The opposite side of the half page contains the narrative description of the hydraulic fluid as it applies components or shifts valves in the system. Facing this partial page is a hydraulic schematic that shows the position of valves, checkballs, etc. This would not cover the manual transmission models. According to the book, the retaining ring on the top is not reuseable:And I don't know if the Master kit comes with this retainer.
Their locations do not affect the operation of the given valves. Operational theories of the mechanical, hydraulic and electrical components are presented in a sequential and functional order to better explain their operation as part of the system. In the first section of this book entitled , exacting explanations of the major components and their functions are presented. All the roller bearings, roller thrust bearings, and selective washers are fine. Since there is a wide range of repair procedures and technical specifications specific to certain vehicles and transaxle models, the proper service publication must be referred to when servicing the Hydra-matic 4T65-E transaxle.
Manufacturer Model Year Range Transmission Buick Century 2000-2004 4T65E Buick LaCrosse,Allure 2005-2008 4T65E. The opposite side of the half page contains the narrative description of the hydraulic fluid as it applies components or shifts valves in the system. But that still doesn't explain why your Trans shifts from 1st to 2nd on its own even when you try to shift manually. This transmission is electronically controlled, including an electronically controlled lockup torque converter. Installing a shift improver kit can also help cure this problem. Drove Left axle oil seal out from behind with hammer and screwdriver. It also uses a four element lockup torque converter, four planetary gear sets as well as five multiple disc and one mechanical clutch set.
A re-manufactured transmission also comes with a : three years compared to 90 days for a rebuilt transmission. To give credit where credit is due please go to And thank member agrazela for his mechanical know how. Technicians or other persons not having automatic transaxle or transmission know-how may find this publication somewhat technically complex if additional instruction is not provided. The 8L90 utilizes an off axis chain drive pump to maintain fluid volume and operating pressures. Since the intent of this book is to explain the fundamental mechanical, hydraulic and electrical operating principles, technical terms used herein are specific to the transmission industry.