10L90 Transmission Parts

10L90 transmission parts for 2018+ GM heavy-duty applications. The 10L90 is the strengthened version of the 10L80, designed for higher torque capacity behind the 6.6L L8T gas V8 in HD trucks and other heavy-duty applications.

Shares the same basic architecture as the 10L80 with reinforced internals — heavier-duty input shaft, larger clutch packs, stronger output components. Used in 2500/3500 Silverado/Sierra HD, Yukon XL/Suburban Denali, and Hummer EV applications.

We stock rebuild kits, friction packs (Alto, Raybestos), valve body components, master rebuild kits, torque converters, solenoid packs, filters, pan gaskets, and HD-specific hard parts for the 10L90. The 10L90 takes most 10L80 service parts with HD upgrades where applicable.

Use Dexron ULV — same as the 10L80. Service every 50,000 miles in normal use, 30,000 miles for towing or severe duty. Free shipping over $70. Same-day shipping on in-stock parts.