4L60E Master Rebuild Kit 1997-2003, new and ready to install. Fits the 4L60E. Ships fast from the USA.
The 1997-2003 4L60E is the version most people are rebuilding today: it sits behind the Vortec and LS-family V8s in GMT800 Silverado and Sierra 1500 pickups, Tahoe, Suburban and Yukon, and in S10, Sonoma, Blazer, Camaro and Corvette applications of the same era. If yours is flaring between shifts, has lost 3rd and 4th, or the pan is full of black lining material, this new master rebuild kit is the starting point for a complete overhaul instead of a one-clutch patch job.
Four clutch packs (overrun, forward, 3-4 and reverse input) plus the 2-4 band and low/reverse clutch put the 4L60E into each gear. All of them depend on rubber and Teflon seals holding apply pressure against a piston, and on friction plates that still have their paper intact. Heat kills both. Once the 3-4 pack has burned, the debris travels through the pump and valve body, which is why a full reseal with fresh frictions and steels makes more sense than replacing only the pack that quit. A master kit puts every seal, gasket, friction and steel in the unit back at zero miles at the same time.
Rule out hydraulics first. On these years a worn valve body bore can mimic a failed clutch: Sonnax ties TCC regulator wear to converter slip codes such as P0741, and pressure regulator bore wear to 3-4 clutch and 2-4 band burn-ups. If you rebuild the hard parts and reinstall a leaking valve body, the new 3-4 pack can fail again. Our 4L60E common problems guide walks through separating clutch failure from pressure problems, and a pressure gauge on the line tap is the cheapest diagnostic you can buy. If the pan shows heavy lining and the truck has no 3rd or 4th, plan on the overhaul.
This kit is listed for the 4L60E from 1997 to 2003. That window lines up with GM's move to the PWM (pulse width modulated) torque converter clutch: Sonnax splits its TCC solenoid parts at '97, with '97-later PWM units on one side and '96-earlier on the other. 1998-later units also picked up EC3 controls on the TCC regulator circuit. Late in this range, 2003 introduced the late-style EPC solenoid and a new valve body family that carried on to 2008, so a 2003 truck can have either style depending on build date. A master kit covers the soft parts, but check your case and pan gasket against what comes out of the transmission, and if in doubt send us the year and VIN. A 2004 unit needs the 2004 master rebuild kit instead. Every other part for this unit is on our 4L60E collection page.
The bench tools that make this job go smoothly, from a clutch spring compressor to a dial indicator for end play, are listed in our 4L60E bench rebuild tools guide.
| Fits | 4L60E 1997-2003 |
| Part type | Master Rebuild 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.
It is listed for 1997-2003 4L60E units, so a 2003 Silverado or Sierra 1500 is in range. GM changed the EPC solenoid and valve body style during 2003, which affects solenoids and the valve body rather than the soft parts, but send us the year and VIN if you want us to check.
No. A master kit covers frictions, steels, seals and gaskets. Drums, the sun shell, bushings, sprags and the pump are inspected and replaced separately if worn.
GM specifies Dexron VI ATF for the 4L60E. Fill the pan, start the engine, then check and top off the level at operating temperature.
Inspect them. Worn TCC regulator and pressure regulator bores are a known cause of repeat 3-4 clutch failures, so vacuum test the valve body before reusing it and replace the EPC solenoid if shifts were harsh or soft.
Many techs reset adaptive shift values with a scan tool after an overhaul so the computer is not compensating for the old worn clutches. Expect shifts to firm up over the first drive cycles.
