4L60E Overhaul Kit 1993-2003, new and ready to install. Fits the 4L60E. Ships fast from the USA.
If your 1993-2003 Chevy or GMC is leaking from the pan and front pump, engages slowly on a cold morning, or you already have the transmission on the bench for new clutches, this is the soft-parts kit that puts every circuit back together tight. It covers the full first decade of the 4L60E, from the early C/K 1500, Tahoe, Suburban, Blazer and S10 through the 1999-2003 Silverado and Sierra 1500, plus Camaro, Firebird and Corvette applications. The photo shows a cork pan gasket, valve body and spacer plate gaskets, red lip seals, large case O-rings, sealing rings and a spread of small O-rings for the servos, accumulators and fittings.
A 4L60E makes every shift by pushing line pressure into a clutch piston or the 2-4 servo. The oil has to cross the valve body gaskets, the spacer plate, the case passages, the Teflon rings on the turbine and stator shafts and finally the lip seal on the piston. Any one of those that has gone hard after twenty-plus years lets pressure bleed off, so the clutch applies soft and slips. An overhaul kit replaces that whole chain of rubber, paper and Teflon in one go. It does not include frictions, steels, a band or a filter, so plan to add those if the old ones are burnt or glazed.
Pull the pan first. Clean fluid and a light film on the magnet with a leak or slow engagement points to seals. Black fluid and friction material means you need clutches too. Codes matter: Sonnax notes late 4L60E units can set either P1870 or P0741 for converter clutch slip, and that points at the valve body and converter circuit rather than the clutch seals. Our 4L60E common problems guide separates the hydraulic, electrical and hard-part failures, and the 1-2 accumulator and shift feel guide helps when the only complaint is a harsh or soft first shift.
This kit is listed for the 4L60E built from 1993 through 2003. That span covers some real changes inside the unit. GM moved converter clutch control from a simple on/off solenoid to PWM in the mid-1990s, and the valve body gaskets changed around 2001, which is why some kits carry two gasket styles. Before you bolt the valve body up, lay the new gaskets over your spacer plate and confirm every hole lines up. 2WD and 4WD units also use different tailhousings and rear seals. If you are unsure, send us your year and VIN, or browse the full 4L60E parts collection for year-specific kits.
| Fits | 4L60E 1993-2003 |
| 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 gasket and seal overhaul set: pan gasket, valve body gaskets, lip seals, sealing rings and O-rings. Frictions, steels, a band and a filter are bought separately if your unit needs them.
It is listed for 1993-2003 4L60E transmissions, which includes the 1999-2003 Silverado and Sierra 1500. Because the valve body gasket pattern changed around 2001, check the gaskets against your spacer plate, or send us your VIN to confirm.
Pan, servo cover and rear output leaks can often be fixed in the truck. Front pump seal leaks and internal piston seal failures need the transmission out and torn down, which is when a complete kit like this pays off.
At minimum a new filter, and any frictions or steels that are burnt, glazed or heat-checked. Inspect the reaction sun shell splines and the 2-4 band, since both commonly fail on high-mileage 4L60E units.
Use Dexron VI ATF, which GM lists as the replacement for earlier Dexron grades. Check the level hot with the engine running.
