Description: HYDRA-MATIC 8L90 Manual This is the rebuild manual for the new Hydra-matic 8L90 (8 Speed RWD & 4WD). It 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. Covers assembly, dis-assembly, diagnosis, troubleshooting, and electronic controls & 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 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. Many of those changes are indicated in this manual.The transmission in this manual was disassembled and reassembled without all factory tools. Contents:General Description and Vehicle Application ChartComponent Identification and Application ChartShift Quadrant OperationIdentification Tag Information and SpecificationsTransmission Fluid Requirement, Drain, Fill and Check ProceduresTransmission Line Pressure SpecificationsElectronic Component OperationSolenoid Identification and Application ChartManual Shift Shaft Position Switch OperationTransmission Speed Sensor OperationTransmission Fluid Temperature Sensor and Internal Main Harness IDTransmission Case Connector Terminal IDWiring Diagram ExampleHigh Pressure Accumulator Stop / Start OperationDiagnostic Trouble CodesSolenoid Characterization ProgrammingTransmission DisassembleComponent Rebuild SectionTransmission AssembleTransmission Final AssembleAir Check LocationsTorque SpecificationsSpecial Tools Specifications:Publisher: Automatic Transmission Service GroupSoftcover: Approx. 140 pages
Price: 48.5 USD
Location: Midland, Michigan
End Time: 2024-08-05T17:42:22.000Z
Shipping Cost: 0 USD
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Return shipping will be paid by: Buyer
Returns Accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Return policy details:
Make: GMC
Country/Region of Manufacture: United States
Publisher:: Automatic Transmission Service Group (ATSG)