6L80 Planetary 2006-2011, used and ready to install. Fits the 6L80. Ships fast from the USA.
A 6L80 that whines louder as road speed climbs, drops a gear outright, or leaves bronze and steel glitter on the pan magnet usually has a gearset problem rather than a clutch problem. This used GM planetary is for 6L80 transmissions built 2006 through 2011, the span that covers the GMT900 Silverado, Sierra, Tahoe, Suburban, Yukon and Escalade, the C6 Corvette automatic, and the first two years of the fifth-generation Camaro. It is a genuine GM part pulled for reuse, so tooth form and spline count are factory.
The 6L80 uses a Lepelletier gear train: one simple planetary at the front feeds a Ravigneaux compound set behind it, and five clutches choose which sun, ring or carrier is driven or held. That arrangement produces six forward ratios from 4.03:1 in first to a 0.67:1 sixth-gear overdrive, plus a 3.06:1 reverse, with fewer gears than older designs needed. Because so few gearsets do so much work, a single worn carrier affects several ranges at once. Pinion needle bearings and the thrust washers on each side of the pinions take the load; once they wear, end play grows, the pinions tilt, and the gear teeth start to mark.
Noise and lost gears overlap with other 6L80 faults. A pump whine follows engine rpm, not road speed, and the 6L80 pump failure guide covers how to tell the two apart. Slip in third, fifth and Reverse points to the 3-5-R clutch, not gears. Work through the 6L80 common problems guide, then pull the pan and look at what is on the magnet. Fine grey paste is normal wear; chunks, needles or bronze flakes mean the gear train needs inspection. With the unit apart, check each pinion for rough rotation, measure pinion end play, and look for chipped teeth or pitting on the sun gears.
Listed for 6L80 transmissions from 2006 to 2011. GM revised the 6L80 several times in that window, and the gear train has more than one planetary assembly, so lay the part you removed beside the listing photo and match pinion count, spline count and carrier shape before ordering. 6L90 gearsets are a different design and will not interchange. If you are not sure, send us the year and VIN and we will check it. Other hard parts for this unit are in the 6L80 collection.
| Fits | 6L80 2006-2011 |
| Part type | Planetary |
| Condition | Used |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers a 6L80 planetary for 2006-2011 units. The gear train has more than one planetary assembly, so compare the photo with the part you removed and match pinion and spline counts, or send us your year and VIN.
It is a used genuine GM part. Spin each pinion and check end play before installing, as you would with any reused gear train part.
It is listed for 2006-2011 units only. Later 6L80s received revisions, so for a 2012 or newer truck send us the VIN before ordering.
A planetary whine changes with road speed and is often worse in certain gears. A pump whine follows engine rpm, including in Park and Neutral.
Thrust washers, Torrington bearings and any worn bushings, plus a new filter. If metal debris went through the unit, flush the cooler and replace the frictions and seals.
