Complete BorgWarner friction clutch module for the GM 10L80 ten-speed, part 35955KIT, covering every clutch pack in the unit for a 2017-up rebuild.
If your Silverado, Sierra, Tahoe, Suburban, Yukon or Escalade with the 10L80 ten-speed is slipping, flaring on upshifts or has a pan coated in brown lining paste, the clutches are worn and the unit needs new frictions. BorgWarner's 35955KIT is the one-box answer: 28 friction plates covering all six clutch packs, A through F, built to the factory dimensions so a GM 10L80 rebuild goes back together with matched material in every pack instead of a mix of new and reused plates.
The 10L80 makes ten forward gears from four planetary gearsets and six multi-plate clutches. Four of the six clutches are held in every gear, so each shift is a swap of one or two packs while the rest stay locked. That is why a single burnt pack can upset several gears at once. BorgWarner's own breakdown of this kit shows how different the packs are:
The large A-clutch plates come pre-soaked from the factory, so they look darker than the rest. That is normal, not a used part.
Not every 10L80 shift complaint is lining. GEARS Magazine points out that clutch clearance outside spec causes harsh or binding shifts the TCM cannot adapt around, but so do valve body faults, and the 10L80 has a well documented valve body wear history. Work through our 10L80 valve body testing guide first. If the slip lives in the upper gears, our 10L80 3-4 clutch failure guide walks through how that pack fails. Sonnax also lists worn sealing rings and hub bushings as one of the biggest causes of lost clutch pressure in these units, which burns new frictions fast if it is missed.
BorgWarner lists the 35955KIT for 2017-on GM 10L80 and the Ford 10R80 and 10R100 that share the same design; interchange number B164119B. Sonnax notes GM changed the clutch apply strategy on Gen. 2 10L units from 2020 on, so the gear chart on a 2019-and-earlier unit will not match every service reference. The plates are what has to match: count the frictions in each pack as you strip it and compare them to the list above before you start assembly. Not sure which version you have? Send us your year and VIN, or browse every part for this unit on our 10L80 parts page.
| Part Number | 35955KIT |
| Fits | GM 10L80, 10L90; Ford 10R80, 10R100 (2017-up) |
| Type | Complete friction clutch module, all clutch packs |
| Brand | BorgWarner |
| Ships | From the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
28 in total: 3 for the A clutch, 6 for B, 5 for C, 5 for D, 5 for E and 4 for F. That relines every clutch in a 10L80 in one order.
BorgWarner lists it for 2017-on GM 10L80 units, which covers those trucks. GM did revise the 10L80 for 2020, so compare plate counts pack by pack during teardown, or send us your year and VIN and we will check it.
No. The kit is friction plates only. Reuse steels only if they are flat and free of heat marks, and plan on new sealing rings, piston seals and a filter.
BorgWarner pre-soaks the largest-diameter set in ATF at the factory, so it ships darker than the others. It is new material.
GM specifies Dexron ULV for the 10L80. Soak the frictions in it before assembly and fill with it afterward, then complete the adaptive relearn.
Only if worn lining or bad clearance is the cause. Test the valve body and solenoids first, because hydraulic faults produce the same harsh or flared shifts.
