Rebuild kit for 1997-2003 GM 4L60E trucks and SUVs with frictions, steels, 2-4 band, filter, gaskets and seals to overhaul a slipping unit.
A 1997-2003 4L60E that flares between 1st and 2nd, slips into 4th, or sits in Drive without pulling has usually worn out its clutch plates or its 2-4 band, and on a high-mileage truck it is often both. This kit packages the parts that take that wear: friction plates, steel plates, a new 2-4 band, a filter, the pan gasket, oil seals, gaskets and O-rings. It is a good fit for the builder who wants fresh friction surfaces and fresh steels without paying for pistons and hard parts the unit may not need.
Every gear in the 4L60E comes from holding or driving part of the planetary gear train. The forward, 3-4, overrun and reverse input clutches do that with alternating friction and steel plates squeezed by a piston, while 2nd and 4th rely on the 2-4 band wrapping the reverse input drum when the servo applies. Frictions glaze and lose lining, but steels wear too: they take a heat set, warp or turn blue, and a bad steel will slip a brand-new friction. Including a full set of steels is the main thing that separates this kit from a frictions-only overhaul. The new band matters because a glazed band is a common cause of a 1-2 or 3-4 flare that a clutch job alone will not cure.
Drive it and note which shifts slip. Band problems show up in 2nd and 4th, the gears the 2-4 band holds, while forward clutch wear shows up as a lazy engagement and slipping in every forward gear. On the bench, measure servo apply pin travel; Sonnax gives roughly 0.075-0.125 in as the target, and the factory procedure uses a dedicated gauge to select the right pin. Our 2-4 band and servo guide covers pin selection and the servo upgrade many builders add. For the overrun clutch, which causes no-engine-braking complaints, see our overrun clutch guide.
Listed for the 1997-2003 GM 4L60E: 1999-2003 Silverado and Sierra 1500; 1997-2003 Tahoe, Suburban 1500, Blazer, S10, Jimmy, Sonoma, Astro, Safari, Express and Savana 1500; 2002-2003 Trailblazer and Envoy; 1999-2003 Escalade, 2002-2003 Escalade EXT and 2003 Escalade ESV; and 1997-2002 Camaro and Firebird. The 4L65E and 4L70E share the general clutch and band layout, but plate counts differ, so check your unit and year before ordering. When in doubt, send us the year and VIN. More parts for this transmission are on the 4L60E shop page.
The kit weighs about 10.4 lb. See the 4L60E rebuild tools guide before you start the teardown.
| Type | Transmission rebuild kit |
| Fits | GM 4L60E, 1997-2003 |
| Includes | Frictions, steels, 2-4 band, filter, pan gasket, oil seals, gaskets, O-rings |
| Weight | 10.41 lb |
| Does not include | Pistons, drums, sun shell, bushings |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It includes frictions, steels, a 2-4 band, filter, pan gasket, oil seals, gaskets and O-rings. Pistons, drums, the sun shell and bushings are not included, so inspect them during teardown.
Yes, the 1999-2003 Silverado 1500 is on the listed fitment. Confirm the case tag reads 4L60E, or send us the year and VIN for a check.
Steels take a heat set and can warp or glaze even when they look usable. A worn steel will slip a new friction, so a full set of steels gives the new clutches a fair start.
A 1-2 flare often comes from a glazed 2-4 band or weak servo apply, and this kit includes a new band. Check servo pin travel and the servo seals during the rebuild as well.
Dexron VI ATF. Soak the frictions before assembly, flush the cooler, and check the level hot at idle in Park after the test drive.
