Chevrolet 6L90 Hill Start Assist Inoperable
The vehicle came back with a complaint of the “Hill Hold Assist” feature was not working since the remanufactured transmission was installed.
Pressure Checker, Bearing Installer Tool For 6L80/6L90 12-3-4/3-5 Reverse Drum
The new Adapt-A-Case multi-functional tool (p/n T-135PRBRAC) tests the pressure of the 6L80/90 1-2-3-4/3-5 reverse drum to ensure there are no cracks or leaks. Simply place the tool in the drum and use an air gun in each hole to check for leaks. It also installs the bearing to the proper depth by placing the
6L80/6L90 3-5/Reverse Drum Check Tool
The 6L80/6L90 3-5/Reverse Drum Check Tool (p/n T45555-LEAK) from Whatever It Takes (WIT) allows you to air check the weld on the drum for cracks. It is made of billet aluminum and includes a set of sealing rings. For more, visit www.wittrans.com.
6L80/90 3-5/Reverse Drum
The drum may crack at the weld affecting application and setting DCT’s such as P0776.
Sonnax GM 6L45-6L90 Pump Vane
The pump vane is a replacement for rebuilding pump rotors.
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
Updated 6L80/90 Output Shaft Assembly
During model year 2012, Chevrolet and GMC trucks equipped with the 6L80/90 transmission received an updated output-shaft assembly. The previous output-shaft assembly was comprised of a separate output shaft, output carrier ring gear, ring-gear spacer, output carrier internal front gear and snap rings as seen on the left in figures 1 through 3. This required the use of a specific style output transmission speed sensor also shown on the left in figures 4 and 5.
Location and Function of New #8 Checkball for 6L80/90
The 6L80/90 transmission is showing up in shops much more frequently than in the past, as vehicles equipped with this unit get older. Believe it or not, the 6L80 is already 10 years old! As time flies by and we get familiar with rebuilding a specific transmission, we store in our memory more and more details of the disassembly and reassembly of specific items — such as the pump, input drum and valve body — to the point where it becomes second nature. This particular transmission is a pretty easy build. After their third overhaul, most builders would tear down the internal components and dump everything into a basket, run it all through the parts washer and start rebuilding and reassembling after the parts are cleaned.
Vacuum Testing GM 6L45, 6L50, 6L80, 6L90
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
