Master overhaul set for the GM 4T65E transaxle in Buick, Pontiac and Chevy FWD cars: frictions, bonded pistons, seals, gaskets, filter and band.
When a 4T65E in a Buick LeSabre, Century, Lucerne, Chevy Impala, Monte Carlo, Pontiac Grand Prix or GM minivan starts slipping on the 1-2 or 2-3 shift, engages late, or drips fluid from the vent, the fix on a mechanically sound unit is soft parts. This master kit covers the whole 1997-2011 run in one box: friction plates, bonded apply pistons, Teflon and metal sealing rings, metal-clad lip seals, the case and channel plate gaskets, O-rings and rubber piston seals, a pan filter and the coast band. Steel plates are not included, which keeps the price down when your steels are still good.
Every gear in the 4T65E depends on a clutch or band holding under line pressure that comes up through the pump, the channel plate and the valve body. The channel plate is the big casting on the side of the case, and its gaskets seal dozens of passages between it and the case. When those gaskets or the piston lip seals leak, pressure bleeds off before it reaches the clutch, the plates slip, and the frictions burn. This kit replaces the parts that wear and leak: the frictions that do the gripping, the piston seals that apply them, and the gaskets and rings that keep the circuits separate.
Start with codes and a pan inspection. If the only problem is a vent leak with clean fluid, the bulletin repair may be all you need; if the pan holds lining and metal, plan the full overhaul. Weak pressure can also come from the pump, so read our 4T65E pump failure guide along with the 4T65E common problems guide before you order.
This kit is listed for 1997-2011 4T65E transaxles in the H, W and U-body cars: Buick LeSabre, Park Avenue, Regal, Century, Rendezvous, LaCrosse, Allure, Terraza and Lucerne; Chevy Lumina, Monte Carlo, Impala, Venture and Uplander; Pontiac Grand Prix, Bonneville, Aztek, G6, Montana and Montana SV6; Oldsmobile Intrigue, Aurora and Silhouette; and Saturn Relay. The 4T65E changed over those years, including the 2003 switch to pawl-type input and third freewheels with a different input friction. Compare your old frictions and pistons with the kit before assembly, or send us your year and VIN and we will confirm it. All of our parts for this unit are on the 4T65E parts page.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The kit has frictions, bonded pistons, sealing rings, lip seals, gaskets, O-rings, rubber piston seals, a filter and the coast band. Reuse your steels if they are flat and not heat discolored, or replace them separately.
It contains the channel plate gaskets that GM bulletin 01-07-30-032E calls for on 1997-2009 4T65E units that leak from the vent. The plate must be torqued correctly on reassembly.
It is listed for 1997-2011. GM changed the input freewheel and input friction in 2003, so compare your old parts with the kit or send us your year and VIN.
Dexron VI. Flush the cooler and lines first so old friction material does not get into the rebuilt unit.
Inspect and replace as needed the drums, pump shaft sleeve, axle bearing and seals, and any worn valve body. Clear the shift adapts when the job is done.
