4L60E Overhaul Kit 1997-2003, new and ready to install. Fits the 4L60E. Ships fast from the USA.
The late-1990s 4L60E is the one most people are rebuilding today: it sits behind the LS-family V8 in 1999-2003 Silverado, Sierra, Tahoe, Yukon and Suburban models, in the 1997-2003 Corvette, and in the S10, Blazer and Camaro of the same years. Those engines make more torque than the 700-R4-based gear train was first sized for, so 1997-2003 units come in with burnt 3-4 clutches, a slipping 2-4 band and leaks all at once. This new overhaul kit is the seal and gasket half of that rebuild. The photo shows a molded pan gasket, valve body and spacer gaskets, a pair of red lip seals, colored piston and servo O-rings, Teflon shaft rings and the small fitting O-rings.
Every apply in this transmission is hydraulic. Line pressure leaves the pump, runs through the valve body and spacer plate, crosses into the input shaft through Teflon sealing rings, and finally pushes a clutch piston or the 2-4 servo. When the seals at any of those joints shrink with heat and age, the apply circuit loses pressure under load and the clutch slips instead of clamping. That is the common thread behind many 3-4 clutch failures on these trucks. The kit renews those sealing points in one order. It does not include friction plates, steels, the band or a filter.
Burnt 3-4 clutches on this generation are not always the clutch's fault. GEARS Magazine traced many of them to poor line rise caused by a failing mass airflow sensor, so check MAF readings and pressure before you blame the seals. Sonnax points to two more hidden leaks on 1997-2003 builds: a worn 2-4 servo pin bore in the case, and cross-leakage at the servo that starves both the band and the 3-4 clutch. Use our 2-4 band and servo guide to check servo pin travel and bore wear, and the 3-4 clutch apply and AFL valve guide for the valve body side of a weak 3-4 apply. If shifts are erratic but not slipping, rule out a solenoid with the shift solenoid guide.
This kit is listed for 4L60E transmissions from 1997 through 2003. Kits for this transmission are sold in more than one year split because gaskets and seals changed over the run, and the valve body gasket pattern changed again around 2001. Match the new gaskets against your old ones and your spacer plate before assembly, and check that the rear seal matches a 2WD or 4WD tailhousing. If your truck falls near the edge of the range, send us the year and VIN. The full 4L60E collection has kits for 1993-1996 and 2004-up units.
| Fits | 4L60E 1997-2003 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the overhaul gasket and seal set. For a burnt unit, pair it with new frictions, steels, a 2-4 band and a filter, or choose a master kit that already bundles them.
It is listed for 1997-2003 4L60E transmissions, and the C5 Corvette used the 4L60E in those years. Corvette applications differ from trucks at the output end, so check the gaskets and rear seal against yours or send us the VIN before installing.
Common causes are low line pressure from a bad MAF sensor, a worn 2-4 servo pin bore, and servo cross-leaks. New seals help only if those are corrected at the same time.
Both cover 1997-2003 trucks, but gasket styles differ between kits. Compare the pan and valve body gaskets with what came out of your transmission, or give us your year and VIN and we will confirm.
Dexron VI ATF. Check the level hot with the engine running, then recheck after the first drive.
