4L60E Master Rebuild Kit with BorgWarner Frictions and Band

This master kit covers the parts that wear out in a GM 4L60E, 4L65E and 4L70E and leaves you with nothing to order mid-rebuild. It contains BorgWarner friction clutches with the matching steel plates, a wide 2-4 band, bonded rubber pistons, a new filter, the pump bushing and extension housing bushing, and a full Transtec soft parts kit with the gaskets, lip seals, O-rings and sealing rings. Kit weight is about 13 lb.

These transmissions sit behind the Silverado 1500 and Sierra 1500 (2WD and 4WD), Tahoe, Suburban, Yukon, Camaro, Corvette and Cadillac CTS. Year ranges are not given for this kit, so compare the pistons and gaskets against your case during teardown, especially if you are working on a later 4L65E or 4L70E.

Bonded pistons are the reason to pick this kit over a basic overhaul set. The molded rubber lip is bonded to the steel piston, so there is no loose seal to roll or cut when you drop the piston into its drum, which is a common cause of a slipping clutch right after a rebuild. The wide band holds 2nd and 4th better than a worn narrow band. Soak the BorgWarner frictions in ATF for 30 minutes before assembly, set clutch clearances as you stack each pack, and install the new bushings with a proper driver so the pump and output shaft run true.