Full-teardown kit for a 1994-up GM 4L60E: friction plates, steel plates, valve body gaskets, pan gasket, piston seals, O-rings and front and rear seals.
When a GM 4L60E has to come completely apart, this is the kit that covers the clutches and the sealing in one order. It is listed for 1994-and-later electronic units in Silverado, Sierra, Tahoe, Yukon, Suburban, S10, Sonoma, Blazer, Camaro and Corvette applications, and it is aimed at the most common complaints: slipping in third and fourth, a flare on the 3-4 shift, no reverse, or dark fluid with lining material in the pan.
The kit carries friction plates and steel plates for the clutch packs, valve body separator plate gaskets, the case-to-pump gasket, a cork-style pan gasket, lip and D-ring piston seals, sealing rings, an assortment of O-rings, and both the front pump seal and the rear tailshaft seal. Inside the transmission those parts do two jobs. The seals let the pistons in the forward, overrun, 3-4 and low/reverse circuits hold apply pressure, and the frictions and steels turn that pressure into a locked clutch pack. When either side wears, the pack slips, heats up and takes the next one with it.
A pressure problem can mimic worn clutches. Sonnax's vacuum test guide ties specific 4L60E symptoms to individual valve body bores, so a leaking valve body can be found before the case is opened. Start with the 4L60E common problems guide, and if a solenoid code is set, test that circuit first; a 4L60E master solenoid kit is cheaper than a teardown. If the pan shows heavy lining and gears are missing, the overhaul is the fix.
This kit is for the electronically controlled 4L60E only. The older hydraulic 4L60, the 700R4 family with a throttle valve cable instead of shift solenoids, takes a different kit. Our 4L60E data starts at 1993, while this listing is labeled 1994-on, so a 1993 owner should send us the VIN first. Pump seals, valve body gaskets and 3-4 clutch counts also changed between early and late production, so lay the kit next to your old parts and compare before you commit to the teardown. If anything does not match, send us your year and VIN and we will confirm. The full parts list for this unit is on the 4L60E collection page.
| Transmission | GM 4L60E, 1994-on |
| Includes | Friction plates, steel plates, valve body gaskets, pump gasket, pan gasket, piston seals, sealing rings, O-rings, front pump seal, rear seal |
| Not for | Hydraulic 4L60 (1982-1993) |
| Condition | New |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 1994-on units. The 4L60E was in production in 1993, so send us the VIN and we will confirm the gaskets and seals match before you order.
No. It is for the electronic 4L60E only. The hydraulic 4L60 and 700R4 use different gaskets, seals and valve body parts.
Neither is listed. The kit covers frictions, steels, gaskets, piston seals, sealing rings, O-rings and front and rear seals. Order a filter separately and inspect the bushings during teardown.
Steels run hot often go blue or warp. New frictions on old steels do not apply flat, and that is one of the most common reasons a rebuilt 4L60E comes back slipping.
Dexron VI ATF. Check the level with the engine running and fluid at operating temperature, then clear the adaptive shift values so the computer relearns.
