Video: GM 8L45/90 Part I
Various aspects of the GM 8L45 / 90 eight-speed RWD models will be addressed.
Tech Tip: GM 6L80, 6L90 Low Line Pressure Repair
After installing the service pump cover, a transmission may have low line pressure. Models 2006-2015 GM Passenger Cars and Trucks equipped with 6L80 or 6L90 Automatic Transmission (RPO MYC or MYD) Condition After installing the service pump cover P/N 24248573, a transmission may have low line pressure. If the low line pressure is not identified
6L80, 6L90 (300mm) Performance Converter Kit
For customers with demanding GM 6L80/90 gas-powered applications that use a full-size torque converter, Sonnax has introduced an easy-to-build, cost-effective performance converter kit (#GM-RK-21). Employing a forged cover, forged piston and three woven carbon friction elements, builders now have a dampered 300mm multi-plate option that delivers significantly increased clutch capacity and durability. By re-using the
GM FWD 6-SPD Universal Pulse Dampener (Accumulator)
This repair addresses numerous driveability complaints including harsh, flared and erratic shifts as well as solenoid codes and friction burnup.
GM 6T70/75/80 (Gen. 1 & 2) Jig Plate
The new plate can be used with both Gen. 1 and Gen. 2 oversized actuator feed accumulator piston kits.
GM 6T70/75/80 (Gen. 2) Oversized Actuator Feed Accumulator Piston Kit
The new oversized actuator feed accumulator piston kit re-establishes correct clearance for revived shift control in all ranges.
Expect the Unexpected
A 2011 Chevrolet HD2500 6.6L equipped with a LCT1000 transmission came into the shop with a customer concern of no reverse and the indicator under the “R” is flashing.
No Forward Good Reverse – A Leave Out or a Blow Out
There have been reports in the field that a garage shift from reverse to drive produces a “snapping” sound, which has been traced to a defect with the previous design output shaft assembly. Installing the “UNIGEAR” output shaft assembly seemed to have eliminated the garage shift noise.
GM Gen. 2 6T70, 6T75 and 6T80
Critical Wear Areas & Vacuum Test Locations
10R80/10L90 Ford & GM Ten Speed Unique Filter System
This design will allow enough fluid volume to the pump during a cold start up and quickly prime the pump. As the fluid heats up (low viscosity), the Thermal Plate will move towards a slight ledge along the topside of the filter housing.
Hydraulics Fundamentals: Accumulators & Shift Feel
Accumulators and their circuits have been used for years as the primary method for controlling shift feel. These components are designed to modify a shift by essentially acting as a shock absorber for the fluid pressure that is applying a clutch, brake or band. Cushioning of this high pressure allows the apply component to engage gradually, instead of slamming on and rattling parts and bones alike.
Don’t Assume; Be Systematic with Diagnosis
Like many of you, this time of year I am usually asked to assemble a variety of items and gifts for my family members. In light of these requests, I have spent a significant amount of time analyzing why we waste so much time assembling, disassembling and re-assembling items out of an unwillingness to simply read the instructions. Often this process results in leftover spare parts and frustration.
