4T60E Overhaul Kit 1991-99, new and ready to install. Fits the 4T60E. Ships fast from the USA.
If you are rebuilding the 4T60E out of a 1991-99 Buick, Chevrolet, Oldsmobile or Pontiac and need every gasket and seal in one box, this is the kit. It is the K52900-1E overhaul set, listed for GM 4T60E front-drive transaxles from 1991 to 1999, and the description adds that some late 4T60E applications run into 2002. Inside are the replacement gaskets, O-rings and seals a standard overhaul calls for. It is usually bought by someone who has already decided the transaxle is coming out: the clutches have slipped, a band has burned, or the pump or a drum needs replacing, and nothing should go back together on thirty-year-old rubber.
The 4T60E drives its gear train through a chain from the converter, and every shift is a clutch or band being squeezed by line pressure. That pressure has to travel through the pump, the channel plate, the case passages and the rotating drums without escaping, and each joint along the way relies on a gasket, O-ring or seal. When any of them leaks, the clutch it feeds applies late and soft, heats up and starts to wear. This kit restores those sealing points throughout the unit. It is gasket and seal material only, so the clutch plates, steels, bands and filter come from a separate kit if they need replacing.
A pressure gauge tells you more than guessing. Low line pressure that will not rise under load can come from leaking seals, but it can also come from a worn pump or from wear in the valve body: Sonnax lists pressure regulator and boost valve bore wear on the 4T60-E that produces soft shifts and 2nd and 3rd clutch distress. If the pressure is low at idle in every range, look hard at the pump; our pump failure guide covers the checks, and the 4T65E diagnosis guide lists the related failures this design family shares. Pull the pan as well. A clean pan with soft engagement points toward seals and hydraulics, while heavy friction debris means you need clutches too.
Listed for the GM 4T60E, 1991-1999, in Buick, Chevrolet, Oldsmobile and Pontiac front-drive models, with the listing noting some applications through 2002. It is not for the 4T65E, which replaced the 4T60E in several of the same cars starting in 1997, or the older non-electronic 440-T4. Confirm the transaxle ID tag before you order, or send us your year and VIN. If you already know the frictions are gone, the 1995-up 4T60E overhaul kit and the 1991-94 version add plates and bands. All of our parts for this family are on the 4T65E and 4T60E parts page.
| Fits | 4T60E 1991-99 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | GM |
| Reference | K52900 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing identifies it as overhaul kit K52900-1E for the GM 4T60E, 1991-1999.
It is a gasket and seal overhaul kit: gaskets, O-rings and seals. It does not include frictions, steels, bands or a filter.
The listing notes some 4T60E applications into 2002, but many cars from those years use the 4T65E, which this kit does not fit. Check the transaxle ID tag or send us your year and VIN.
If line pressure was low in every range or the rotor pocket is scored, yes. New seals cannot make up for a worn pump.
Dexron VI. GM made it back-serviceable for transmissions that originally specified Dexron III.
