4L60E Overhaul Master Rebuild Kit 1993-2003

This is a master overhaul kit for the early electronic GM 4L60E, the 1993-2003 case. It carries the friction plates and steel plates for the clutch packs, a new filter, the valve body separator plate gaskets, the pan gasket and the complete seal and O-ring set, so a unit that is torn all the way down can go back together without chasing loose soft parts. The listing cross-references it to 4L60E rebuild kit numbers 74165E and K61908E. Kit weight is about 13 lb.

Listed applications include the 1994-2003 S10, Blazer, Jimmy, Astro and Safari with the 4.3L, 1999-2003 Silverado 1500, 1995-2003 Tahoe and Suburban 1500, 2002-2003 Trailblazer and Envoy, and the 1994-2003 Corvette. The 4L60E changed in 2004, so on a 2004-up truck confirm the kit against the parts in your case before you start the teardown.

The usual reasons to go this deep: a burned 3-4 clutch pack that shows up as a flare or no 4th gear, a worn 2-4 band that gives a slipping 1-2 shift, and leaking piston seals that drop apply pressure. On the bench, soak every friction in clean ATF for at least 30 minutes, check each clutch pack clearance as you stack it, lube the new lip seals before you install the pistons, and replace the filter. Inspect the sun shell, the 3-4 apply ring and the pump before reassembly, since those hard parts are not in a soft-parts kit and a cracked sun shell will undo the rebuild.