4T60E Master Rebuild Kit 1991-94, new and ready to install. Fits the 4T60E. Ships fast from the USA.
This is a complete master rebuild kit for the first generation of GM's electronic 4T60-E, the 1991-1994 units. Those years cover the cars the transaxle launched in and spread to quickly: the 1991 Buick Park Avenue where it debuted, the Oldsmobile 98 and 88, the 1992-on Buick LeSabre, the 1991-93 Buick Riviera and Cadillac DeVille with the 4.9L V8, and from 1993 the Chevrolet Lumina, Buick Regal and Oldsmobile Cutlass Supreme. If yours now slips into second or third, flares on the 1-2 shift, takes a long time to engage Drive, or has burnt fluid full of friction material, a soft-parts reseal will not hold; the clutch packs and bands need renewing.
The 4T60-E is a chain-drive, four-speed front-wheel-drive transaxle that adds computer-controlled shifting to the older 4T60. Inside, four clutch packs and two bands are applied by line pressure in sequence to give each gear. Every friction you take out of a high-mileage unit is glazed or thinned, every lip seal has hardened, and every piston seal leaks a little, which is why the unit gets slower and softer before it quits. This kit replaces the whole wear package in one box. Per the listing it contains Borg-Warner friction plates together with the steel plates (cheaper kits leave the steels out, and reused steels are a common cause of a rebuild that shudders), a Transtec soft parts kit with the rubber seals and gaskets for the complete overhaul, a new filter, and new bands. Pistons are not included on this 1991-94 kit, so inspect yours for cracks and bonded-seal damage during teardown.
Check fluid level and condition, then do a pressure test before committing to a teardown. A 4T60-E with low line rise can feel like worn clutches when the actual cause is a worn pressure regulator or boost valve bore, and fitting new frictions on top of that only buys a few months. Pull the pan: heavy friction material and metal on the magnet confirms internal wear. The 4T65E that replaced this unit in 1997 shares most of its layout and failure patterns, so our 4T65E common problems and diagnosis guide is a useful checklist for separating clutch failure from hydraulic faults.
This kit is listed for 1991-1994 4T60-E transaxles. GM made running changes inside that span: Sonnax notes a revised TCC regulator valve for 1993 and later units, and a different 2-3 shift valve and 3-2 manual downshift valve from 1994 on, so a 1994 valve body is not the same as a 1991. Those changes are in the valve body rather than the clutch packs this kit covers, but clutch counts and drum designs can still vary by application. Read the identification tag on the case and send us your year and VIN if you want us to confirm the kit before it ships. For a 1995 or later unit, use the 1995-up 4T60-E master rebuild kit instead. Other 4T60-E and 4T65E parts are on our 4T65E and 4T60-E parts page.
Soak every new friction plate and the bands in transmission fluid for at least thirty minutes before assembly. Inspect drums and bushings as you go; a cracked or worn 4T60-E input drum will eat new seals, and the planetary reaction shell should be checked for worn splines. Set clutch clearances to specification rather than trusting stack height, prime the pump, and fill with Dexron VI, which GM made back-serviceable into older Dexron III transmissions such as this one. For parts and labor planning, see our guide to what drives rebuild cost on the successor unit.
| Fits | 4T60E 1991-94 |
| Part type | Master Rebuild Kit |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The 1991-94 kit includes frictions, steel plates, seals and gaskets, a filter and bands, but not pistons. Inspect your pistons for cracks and damaged bonded seals during teardown and replace any that are worn.
It is listed for 1991-1994 units only. For 1995 and later, choose the 1995-up master rebuild kit. If your car is near the changeover, send us the year and VIN and we will confirm.
Steels wear and heat-check along with the frictions. Reusing old steels behind new frictions is a common cause of shudder and short rebuild life, so this kit includes new steel plates with the frictions.
Bushings, any worn drums, and the torque converter, which holds debris from the old clutches. Check the valve body bores for wear too, since low line pressure burns new clutches quickly.
Dexron VI. GM designed Dexron VI to be back-serviceable into transmissions that originally used Dexron III or IIE, which includes the early 4T60-E.
