Atsg Transmission Repair Manuals
Atsg 4l60e Transmission Repair Manual
You’ve finished reassembling the 2-4 servo in that THM 4L60-E. You made sure the dimensions of the second apply piston and housing are compatible with the other components.
You used the J-22269-01 tool to compress the cushion spring and installed the servo return spring onto the assembly. But, for some odd reason, you have an extra component. What happened? Well, at this point in the operation, we’d go straight to page 97 of the GM THM 4L60-E Transmission Rebuild Repair Manual: 1993-Up to see where we went wrong.
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With a quick review of the step-by-step procedures that are a staple of ATSG transmission manuals, we can see immediately we didn’t miss anything. So we can get back to work.
We imagine this is how a professional would use this great book to work on GM’s 4L60-E. This manual is a thorough and focused review of the most common procedures known for repairing, maintaining and overhauling the THM 4L60-E. The GM THM 4L60-E Transmission Rebuild Repair Manual: 1993-Up has comprehensive descriptions and needed information about everything from internal electronic controls to torque specifications.
Now, if you’ll excuse us, we’re still wondering where that extra component came from NOTE: ATSG has an UPDATE HANDBOOK which includes changes in engineering in the 4L60-E. Between the handbook and manual, you’ll have a comprehensive resource for the overhaul and repair of this GM transmission.
The new Hydra-matic 6T70/75 (6 Speed) is a fully automatic, six speed, front wheel drive, electronically controlled transmission that features clutch to clutch shifting. It is also all-wheel drive capable. It was first introduced in the 2007 model year in several different models. It consists primarily of a four element torque converter, three planetary gear sets, five clutch packs, one mechanical one-way clutch and a hydraulic pressurization and control system. Three planetary gear sets provide the six forward gear ratios and reverse. Changing gear ratios is fully automatic and is accomplished through the use of a Transmission Control Module (TCM), that is located within the transmission.
The AF23/33-5 is a fully-automatic, five speed, electrically controlled, front-wheel drive transmission. This transmission is currently used by many different vehicle manufacturers, among them are; GM, Infiniti, Nissan, Saab, Saturn, Suzuki, and Volvo. In the GM, Saturn and Suzuki vehicles, the transmission is known as the AF23/33-5. In Saab vehicles it’s designated FA 57. Nissan and Infiniti call it the RE5F22A, and in a Volvo it’s known as the AW55-50/51SN. This transmission contains three planetary gear sets, three driving friction elements, five holding friction elements (one of which is a servo applied band), two sprags, and a torque converter, which contains a clutch assembly for increased fuel efficiency. The three planetary gear sets provide five forward speeds and one reverse speed.
Gear ratio change is fully automatic and controlled through the Transmission Control Module (TCM). The TCM monitors and receives inputs from various electronic sensors, then uses the information to control shift timing, clutch apply control, line pressure control, and torque converter clutch application. This manual will contain overhaul information pertaining to the AF23/33-5, AW55- 50/51SN, and RE5F22A transmission. Since the introduction of the THM 4T65-E transmission in model year 1997, there have been many major engineering design changes to improve durability and reliability.
These changes have affected many of the parts used in the THM 4T65-E. This 'Update Handbook' will cover preliminary information and will also explain each change, the parts affected by the change, and any parts interchangeability concerns created by the change. This manual is a companion manual to the 4T65-E Blue assembly and disassembly manual and is most helpful during a rebuild. HYDRA-MATIC 8L90 Manual - The 8L90 transmission is a fully automatic eight speed rear wheel drive transmission that is available in both two and four wheel drive configurations. It features clutch to clutch shifting which provides eight forward and one reverse gear. It also uses a four element lockup torque converter, four planetary gear sets as well as five multiple disc and one mechanical clutch set.
The 8L90 utilizes an off axis chain drive pump to maintain fluid volume and operating pressures. The externally located TCM controls the changing of gear ratios through the use of solenoids and also controls transmission line pressure through the use of a variable force motor. The TCM will also control converter clutch operation. The 8L90 has undergone some parts changes from it’s inception until the present. Some of those changes are indicated in this manual and some are not. 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. For clarity this manual will address the disassembly and assembly procedures for the 8L90 and is intended for use by the professional technician.