6L80 Planetary 2006, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
The 6L80 went into production for the 2006 model year, first in the Cadillac STS-V and in the C6 Corvette automatic, a year before the GMT900 trucks adopted it. If you are rebuilding one of those launch-year units and the gear train is making noise or has shed metal, this remanufactured planetary is matched to the 2006 build. Remanufactured means it has been cleaned, inspected and restored to service, so you are not gambling on a core that came out of another worn unit.
GM built the 6L80 around the Lepelletier principle. A conventional single planetary at the front of the case acts as a reduction stage, and its output feeds a Ravigneaux compound gearset with long and short pinions sharing one carrier. The five clutches route torque through different members of those sets to give six forward speeds and Reverse. In a high-output car application like the STS-V or Corvette, first and Reverse multiply a lot of torque through the pinion shafts, so pinion bearings, thrust washers and sun gear splines carry the wear.
Before a gearset goes on the bench, rule out the cheaper causes. Check fluid level at the check plug with the unit hot, because low fluid on these cars causes noise and slip on its own. Scan for codes and look at the Corvette-specific issues in the 6L80 Corvette common problems guide. A pump whine that tracks engine speed, a burnt 3-5-R pack or a valve body fault can each look like a gear problem from the driver's seat. Once the pan is off and the magnet shows bearing or bronze debris, it is time to pull the gear train and inspect each carrier.
This planetary is listed for 2006 6L80 transmissions. Early units had details GM changed in later production, so match the carrier you remove against the listing photo, count pinions and splines, and confirm the shaft size before installing. It is not a 6L90 part; the 6L90 uses a longer case and heavier internals. If your car or truck is a 2007 or later, or you are unsure which assembly you need, send us the year and VIN. The full range of hard parts is in the 6L80 collection.
| Fits | 6L80 2006 |
| Part type | Planetary |
| Condition | Remanufactured |
| 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.
The 6L80 launched for 2006 in the Cadillac STS-V and the C6 Corvette automatic. GM trucks and SUVs adopted it for 2007. Send us your VIN if you are not sure which unit you have.
It is remanufactured: cleaned, inspected and restored to service-ready condition. It is not a used core pulled straight from another transmission.
Do not assume it will. The 6L80 was revised during production, so match pinion count, spline count and carrier shape to your old part, or order the version listed for your years.
Yes. Each gear loads the pinions differently, so a worn carrier is often loud in one or two ranges and quiet in others, and the noise changes with road speed.
DEXRON-VI. The 6L80 has no dipstick, so set the level hot at the check plug, then reset adapts with a scan tool.
