4T60E Master Rebuild Kit, new other (see details) and ready to install. Fits the 4T60E. Ships fast from the USA.
This is an Alto DK8400X master rebuild kit for the GM 4T60-E, the electronic four-speed front-drive transaxle used from 1991 through 1999 behind the 3.1L, 3.4L and 3.8L V6. Owners of a Buick LeSabre, Park Avenue or Regal, an Oldsmobile 88 or 98, a Pontiac Bonneville or Grand Prix, a Chevrolet Lumina, or a Trans Sport or Silhouette minivan usually find it after the car started flaring on the 2-3 shift, engaging Drive slowly, or dripping from more than one seal. The kit is new old stock from Alto, sealed in its original packaging, and it includes the steels, which many budget kits leave out.
The 4T60-E is a chain-drive transaxle: the converter turns a drive sprocket, a chain carries power down to the gear train, and clutch packs and bands apply in sequence to make each gear. Every clutch apply depends on rubber seals and shaft sealing rings holding pressure, so a high-mileage unit loses grip and gets slower long before it fails outright. Per the listing, this kit contains Alto's overhaul gasket pack (Alto 062804, ref K84900X) with Vespel sealing rings, which hold up to heat better than plain rings, along with the electronic-model friction set (card 062752H) and matching steel separator plates (card 062753H). The listing does not mention bands, a filter or pistons, so budget for those based on your teardown.
Do not count on a trouble code. Transmission Digest points out that the 4T60-E, unlike the later 4T65-E, has no turbine speed sensor, so the computer cannot see clutch slip and will not flag it. Check the fluid level and smell, pressure test the unit, and pull the pan. Heavy friction material means the packs are done. Low line rise with a clean pan points to valve body wear instead. The 4T65E grew out of this transaxle and shares much of its layout, so our 4T65E diagnosis guide and pump failure guide are useful references.
The DK8400X is listed for 1991-1999 GM 4T60-E electronic transaxles. It is not for the hydraulic 4T60 (440-T4) or the 4T65E that replaced it starting in 1997. Some 1997-1999 cars used either unit depending on model, so confirm the transmission code on the case tag before ordering, and compare the friction count and tooth style to your old plates during teardown. Not sure which you have? Send us your year and VIN. For first-generation units, also compare our 1991-94 4T60-E master kit, and browse the related front-drive parts on our 4T65E and 4T60-E parts page.
| Fits | 4T60E |
| Part type | Master Rebuild Kit |
| Condition | New Other (See Details) |
| Brand | Alto |
| Reference | DK8400X |
| 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 1991-1999 GM 4T60-E transaxles, including the Buick LeSabre, Park Avenue and Regal, Oldsmobile 88 and 98, Pontiac Bonneville and Grand Prix, Chevrolet Lumina, and Trans Sport and Silhouette minivans. Confirm the case tag, since some late-1990s cars used the 4T65E instead.
It is new old stock: a factory-packaged Alto kit that has been on the shelf. The gaskets, seals, frictions and steels are new and unused.
The listing covers the overhaul gasket pack with Vespel sealing rings, frictions and steels. Bands, a filter and pistons are not listed, so plan to buy them if your teardown shows wear.
Usually not. The 4T60-E has no turbine speed sensor, so the computer cannot detect clutch slip the way a 4T65E can. Diagnose by feel, pressure test and pan inspection.
Dexron VI. It is approved for older GM applications that originally called for Dexron IIE or III.
