If you aren't sure which Sonnax GM 6L80, 6L90 456 upgrades are right for your transmission build, watch this video to get a great breakdown of all the options. High Performance Product Line Manager Gregg Nader explains the different levels of clutch capacity available for stock/HD commercial and lightly modded street/strip performance vehicles all the way up to extreme racers. Then we dig into how each part improves transmission durability with a look at the unique heavy duty and high capacity 456 piston kits plus heavy duty/extreme duty 456 hub and intermediate shafts.

Learn more about Sonnax 6L80, 6L90 transmission repairs and upgrades here: https://www.sonnax.com/gm_6L80_6L90