The GM line 6l80/6l90 has gained a poor reputation due to toque converter failure. Our tommy built line of transmission has upgrades built in. Most failures from the 6l80/6l90 can be found in the touqe converter, It isnt robust enough to handle the amount of time its locked and unlocked to adress shutter from the cyl deactivation that is programed on most gm trucks/suv. We start with a upgraded one peice lockup plate wrapped in a billet cover converter. All of the bellhouseing and pump are replaced when we overhaul and new non stick vavles installed in pumps. We also raise line pressure and vavle body will be upgraded with 8 check balls. All new clutches and seals with a new input drum with OE bushings are installed as well as a refurbished Techem. ON our 6l90 the 456 drump gets added clutches for better driveability as well as the 3,5,R.
We can build these unit to hold up to 1000hp! We also send them Pre Programmed to your vin. Email or call for perfromance builds.