Every seal, gasket, and O-ring needed to reseal a GM 6L80E or 6L90E during a rebuild: input/output shaft seals, pan gasket, paper gaskets, and O-ring set.
A 6L80 that drips from the bell housing or tailshaft, or one you are tearing down anyway, needs every rubber and paper seal replaced at once. This is the TRANSPEED T19502A overhaul seal and gasket kit for the GM 6L80E and 6L90E. The listing covers 2006-2014 applications including the Cadillac Escalade, ESV, EXT, CTS, STS and XLR, Chevrolet Avalanche, Camaro SS and Corvette, Express and Savana vans and the Hummer H2. It suits a shop or DIY rebuilder resealing a unit that still shifts, or building the soft-parts side of a full overhaul.
The 6L80E runs entirely on hydraulic pressure. Its pump feeds the valve body and control module in the pan, and that oil travels through the case, the stator support and drilled shafts to five clutches. Every joint along the way is sealed by an O-ring, a paper gasket or a molded seal. The converter seal at the front and the output seal at the rear keep fluid in the case; the pan gasket seals the sump around the module; internal O-rings and gaskets keep each circuit from bleeding into its neighbor. A small internal leak does not drip on the floor, it shows up as a slow clutch fill.
It does not include friction plates, steel plates, pistons or a filter. Order a filter separately; GM's December 2023 bulletin 23-NA-224 notes the old filter kit was replaced by separate filter and filter seal part numbers, so be sure a new filter neck seal goes in too.
Clean the case, add dye if needed, and find the leak source before you buy, since a front leak can come from the converter hub, the pump gasket or the case. For internal leakage, a line pressure test against commanded pressure tells you whether the problem is sealing or pump output. Units built before December 2008 used a one-piece pump cover sealing ring that leaks to the 1-2-3-4 and 3-5-R clutches, and the later two-piece rings will not fit an early cover. Our 6L80 pump failure symptoms guide explains how to tell the covers apart, and the 6L80 common problems guide covers the cold-engagement leak.
Built for the 6L80E and 6L90E. The applications listed run 2006 through 2014, but GM put several different transmissions in some of these vehicles, so check the RPO code on the glovebox or door label for MYC (6L80) or MYD (6L90) before ordering. If you are not sure, send us your year and VIN. More parts for this unit are on the 6L80 parts page.
| Type | Seal and gasket overhaul (reseal) kit |
| Fits | GM 6L80E and 6L90E six-speed automatics |
| Part number | T19502A |
| Includes | Input and output shaft seals, oil pan gasket, paper gaskets, internal O-ring set, external seals |
| Does not include | Friction plates, steel plates, or pistons |
| Common applications | 2006-2014 Cadillac Escalade/CTS/STS, Chevy Avalanche/Camaro SS/Corvette, GMC/Chevy Express & Savana, Hummer H2 |
| Brand | TRANSPEED |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Input and output shaft seals, the oil pan gasket, paper gaskets, an internal O-ring set and external seals.
No. Friction plates, steel plates, pistons and the filter are not included. Add a master rebuild kit or a filter separately.
GM 6L80E and 6L90E units, listed for 2006-2014 Escalade, ESV, EXT, CTS, STS, XLR, Avalanche, Camaro SS, Corvette, Express, Savana and Hummer H2. Confirm RPO MYC or MYD on your vehicle.
Only if the cause is a rubber seal or gasket. On early units the pump cover sealing rings often cause it, and those must match your one-piece or two-piece cover.
Dexron VI. Set the level at operating temperature through the check plug since the 6L80 has no dipstick.
