Sonnax GM 6L80 Series Transmission Upgrades & Repairs

Sonnax High Performance Product Line Manager, Gregg Nader, delivers an in-depth look at four popular GM 6L80-series transmission upgrades and repairs. Featured products include the heavy-duty 4-5-6 clutch apply piston kit, high-strength pump slide spring, proven line pressure booster kit and award-winning Zip Kit®.