4T40E Overhaul Kit 1995, new and ready to install. Fits the 4T40E. Ships fast from the USA.
If you are rebuilding the 4T40E out of a Cavalier, Sunfire, Malibu, Alero, Cobalt, HHR, Ion or G5, or the transaxle is weeping fluid from the side cover and pan while engagement into Drive gets slower every cold morning, this is the reseal kit the job starts with. It is a new TransTec 4T40E/4T45E overhaul kit, maker number 2420, cross-referenced to the industry 14002AW kit, and it covers 4T40E production from the first 1995 units onward. The year in our title is the start year, not a single-year limit.
The 4T40E is GM's light-duty four-speed front-drive transaxle, with a chain drive between the converter side and the gear train, a side cover over the valve body and a bonded pan gasket underneath. Every clutch in it is applied by oil that has to stay trapped behind a piston seal, and every rotating shaft carries sealing rings that feed those circuits. Once that rubber hardens or the rings wear, apply pressure bleeds away, clutches fill slowly and start to slip, and the computer can only compensate so far.
According to the listing, this kit carries the bonded rubber pan gasket, the side cover gasket-seal, drum piston seals, valve body seals and a set of valve body gaskets, a small-parts bag of case seals, O-rings and seal washers, and metal-clad seals for the converter, both axles and the manual shift shaft. That is the full soft-parts layer of a teardown. It does not include frictions, steels, a filter or bonded pistons. Catalogs list bonded pistons for this unit as a separate part, so inspect yours before you order.
Clean the case and find the leak's real source before deciding on a full overhaul. An axle seal or the converter seal can be replaced without tearing the unit down. Check fluid level and condition next; our ATF color and smell chart helps you tell normal wear from burnt clutch material. If the complaint is a shift that flares rather than slips, read shift flare vs. slip first, because a flare on a 4T40E is often a valve body or pressure regulator problem, not seals. A pan full of friction material means you need frictions and steels with this kit, not just a reseal.
The kit is listed for the 4T40E and 4T45E from 1995 on. That covers the early J-body Cavalier and Sunfire units as well as later Malibu, Alero, Cobalt, HHR, Ion and G5 transaxles. The basic seal and gasket layout stayed common across those years, but valve body castings and the pressure control solenoid changed over production, so compare the old valve body gaskets to the new ones before you bolt anything down. If you are not sure which unit you have, read the ID tag on the case or send us your year and VIN. Browse the full 4T40E parts collection to match the rest of your rebuild.
| Fits | 4T40E 1995 |
| 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. The kit is listed for the 4T40E and 4T45E from 1995 on, so it covers the first-year units as well as later Malibu, Alero, Cobalt, HHR, Ion and G5 transaxles. Compare valve body gaskets to your casting before installing.
No. This is the seal and gasket set: pan and side cover gaskets, piston seals, valve body gaskets, O-rings, washers and metal-clad seals. Frictions, steels, a filter and bonded pistons are separate parts.
Yes. The listing includes metal-clad seals for the torque converter, both axles and the manual shift shaft, so the common external leak points are covered in one box.
Use Dexron VI. GM superseded the earlier Dexron fluids with Dexron VI and it is the correct fill for a rebuilt 4T40E or 4T45E.
Yes. After any internal repair, clear the transmission adaptive values with a scan tool and drive the car through light-throttle upshifts so the TCM relearns clutch fill times.
