6L90 Master Rebuild Kit 2007, new and ready to install. Fits the 6L90. Ships fast from the USA.
A 6L90 that slips in one or more gears, flares on the 2-3 or 4-5 shift, or leaves friction material in the pan of a 2007 or later Silverado or Sierra 2500HD/3500HD, Express or Savana is usually past the point of a valve body fix. This master rebuild kit is built for the 2007-up 6L90 and covers the soft parts for a full overhaul: a BorgWarner friction module, gaskets, seals, O-rings, sealing rings, lip seals, the rubber components and a new filter. It is supplied without steel plates, which keeps the cost down when your steels measure flat and clean.
The 6L90 uses five clutch packs (1-2-3-4, 3-5-Reverse, 4-5-6, 2-6 and Low-Reverse) to make six speeds, and every one of them is sealed by rubber and Teflon that hardens with heat. A master kit lets you reseal the case, pump, drums and pistons and replace every friction in one job, so nothing worn is left behind to drag the new parts down. Because this version leaves out the steels, you reuse the original steel plates after inspection or buy steels separately if they are blued, scored or warped.
Check line pressure with a gauge. GM's bulletin on P0741 ties converter clutch debris to pump scoring, low line pressure and burnt clutches, with the 4-5-6 pack named as the most likely casualty. If the converter shed material, the rebuild has to include the converter, the pump and a cooler flush, not just this kit. Our 6L90 rebuild wear points guide covers what to inspect, and the 6L90 common problems guide helps rule out the cheaper fixes first.
This kit is listed for GM 6L90 units from 2007 on: Silverado and Sierra 2500HD/3500HD, Express and Savana vans, and the 6L90-equipped performance cars. Do not use it on a 6L80. ATSG documents fifteen internal parts that differ between the two, including the 3-5-R clutch hub, and mixing them causes a screech on the 2-3 and 4-5 shift. If your unit is a 2006, see the 2006 6L90 master kit; for a kit catalogued across 2006-up units, see the 6L90 master rebuild kit page. When in doubt, confirm the RPO code MYD on the vehicle label or send us your year and VIN. More parts are on the 6L90 parts page.
If the valve body bores tested worn, a 6L90 Zip Kit valve body repair kit restores them while the unit is apart.
| Fits | 6L90 2007 |
| Part type | Master Rebuild Kit |
| Condition | New |
| 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.
No. It includes the BorgWarner friction module, gaskets, seals, O-rings, sealing rings, lip seals, rubber components and a filter, but no steels. Reuse your steels only if they measure flat and show no heat damage.
It is listed for the 2007-up 6L90. The 6L80 has different internal dimensions, and 2006 units have their own kit listing. Send us your year and VIN if you are not sure which you have.
Inspect the torque converter, pump, 3-5-R drum and 1-2-3-4 piston. Converter debris is a common root cause, so service or replace the converter and flush the cooler with the rebuild.
Dexron VI. A rebuilt unit takes more than the 6.0 quart fluid change capacity GM lists, so fill and check the level hot with the engine running.
Yes. Clear the adaptive values and run the transmission adaptive learn so the module relearns clutch fill times for the new frictions.
