10L80 Planetary, new and ready to install. Fits the 10L80. Ships fast from the USA.
This is a P3 planetary kit for the 10-speed automatic shared by the GM 10L80 and the Ford 10R80. It is aimed at the Silverado, Sierra, Tahoe, Suburban, Yukon or Escalade owner (or F-150 owner on the Ford side) whose transmission is apart because of a grinding or whining gear noise, metal in the pan, or a damaged number 3 gearset. The kit contains three pieces: a P3 planet carrier, a machined sun gear, and a machined thrust washer that sits between them.
The GM 10L80 and Ford 10R80 were developed together and share the same gear train layout: four simple planetary gearsets, numbered 1 through 4 from front to rear, each made of a ring gear, a sun gear and a carrier. Gearset 3 is tied into the rest of the train in two places. Its sun gear is joined to ring gear No. 2 by a shaft, and its ring gear drives the shell that carries sun gear No. 4. Because of those links, set 3 is working in most of the ten ratios, so wear here shows up across a wide range of gears rather than in one.
On the stock parts the sun gear and the planet carrier can run against each other with no washer between them. This kit adds a dedicated thrust washer and supplies a sun gear that has been machined to make room for it, so the two parts ride on the washer instead of on bare steel. That is the whole point of buying the set together: the washer will not fit an unmachined factory sun gear.
Gear noise in this transmission has more than one source, so pin it down first. GM's Preliminary Information PIP5928A describes a 4th-through-7th gear whine on 2022-2023 trucks and SUVs built in specific Silao production windows, caused by reaction carrier pinion machining, and notes it is not a durability concern. A noise that follows engine speed in Park and Neutral points to the front pump drive instead; our 10L80 pump failure guide covers the idler gear noise. If the noise comes with flares or harsh shifts, read the 3-4 clutch failure guide as well, because a slipping pack can also leave debris that damages gears. Confirm the damage at teardown before ordering.
The kit is catalogued for both the GM 10L80 and the Ford 10R80 ten-speeds, 2017 and later. No year range is listed beyond that, and the Ford and GM units did see running changes, so lay your old sun gear and carrier next to the photo, count the splines and pinions, and compare before installing. If you are unsure, send us your year and VIN before ordering. The heavier-duty 10L90 and the smaller 10R60 are not listed. You can browse more parts on our 10L80 collection page.
| Fits | 10L80 |
| Part type | Planetary |
| Condition | New |
| 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.
Three parts: a P3 planetary carrier, a sun gear machined to accept a thrust washer, and the matching machined thrust washer. It does not include ring gears, bearings, seals or clutches.
It is catalogued for both. The two transmissions were co-developed and share the four-gearset layout, but compare your old sun gear and carrier with the photo and send us your year and VIN if anything looks different.
No. The washer only fits because the supplied sun gear has been machined to make room for it. Install the sun gear and washer together.
Not necessarily. GM PIP5928A traces that whine to the reaction carrier and reaction sun gear on units from specific Silao build dates. Check your transmission ID tag date and confirm which gearset is noisy before buying.
Dexron ULV. After refilling and checking the level hot, run the GM fast learn with a capable scan tool so shift quality is correct on the first drive.
