4L30E Overhaul Kit 1982, used and ready to install. Fits the 4L30E. Ships fast from the USA.
This is a Precision gasket and seal overhaul kit for the GM 4L30E, the four-speed automatic used in 1990s BMW 3 and 5 Series cars, the Isuzu Rodeo, Trooper and Amigo, the Honda Passport, Acura SLX and Cadillac Catera. If you have a 4L30E that leaks, has lost reverse, or is already on the bench for a rebuild, this kit supplies the paper gaskets, rubber seals and sealing parts that keep each clutch circuit holding pressure.
The 4L30E applies overrun, reverse, second, third and fourth clutches plus a band, with sprag and roller freewheels doing the rest. Pressure to those clutches comes from valve bodies in both the main case and the adapter case, and passes through a center support and a spacer plate on its way. Every one of those joints relies on a gasket or seal. Once the rubber hardens with age and heat, pressure bleeds off before it reaches the piston and the clutch slips or never applies at all. A full reseal replaces those parts at once so the rebuilt unit holds pressure from end to end.
Transmission Digest notes that on a unit that has never been apart, little or no reverse usually traces to the reverse clutch, and a worn piston seal surface is a common cause. A leaking converter clutch solenoid can also feed into the reverse lockout circuit and cause partial lockup in reverse, which is not a seal kit fix. Check fluid level and condition, then do a line pressure test before teardown; our line pressure testing guide and slipping diagnosis guide walk through it.
The kit is labeled 1982-up, but the 4L30E itself was built in Strasbourg from roughly 1990 to 2004 and went into the BMW E34, E36 and E39, the Z3, the Isuzu Rodeo, Trooper, Amigo, Axiom and VehiCROSS, the Honda Passport, Acura SLX and Cadillac Catera. Treat it as a 4L30E seal kit for those vehicles. One warning matters here: the adapter case, center support and spacer plate vary between vehicle makers and do not interchange, and neither do the gaskets that sit between them. Match the gaskets in the kit to your parts before you discard the old ones. This kit is listed in used condition, so check the contents against your teardown when it arrives. If you are not sure it fits, send your year and VIN. More 4L30E parts are in our rebuild kits section.
| Fits | 4L30E 1982 |
| Part type | Overhaul Kit |
| Condition | Used |
| Brand | Precision |
| Ships | From the USA |
| Warranty | 1-year |
No. It is the gasket and seal set for an overhaul. If your clutches are worn, the master rebuild kit adds frictions and steels.
That is how the kit is labeled. The 4L30E was built from about 1990 to 2004, so treat this as a seal kit for 4L30E units in BMW, Isuzu, Honda, Acura and Cadillac vehicles.
The adapter case, center support and spacer plate differ between vehicle makers, and so do the gaskets between them. Compare each gasket to your parts before you install it.
GM specified Dexron III. GM Dexron VI is the current fluid that replaces it. Check the level hot after the rebuild.
Often, if the reverse clutch seal is leaking. But a leaking converter clutch solenoid can also cause reverse trouble, so test before you tear it down.
