10L90 Banner Rebuild Kit 2018, new and ready to install. Fits the 10L90. Ships fast from the USA.
The 10L90 is the high-torque member of GM's 10-speed family, the unit behind supercharged and high-output V8s such as the Camaro ZL1 and the performance Cadillacs. When one of these starts slipping under hard throttle, flaring on a full-power upshift or coming back from the track with dark, burnt fluid, the friction material and seals are usually what gave up. This banner rebuild kit, listed as HDK135904LSF for 2018-and-later units, gives you the overhaul seal set, a friction pack, clutch pistons and a filter so the clutches can be rebuilt in one teardown.
There are no bands or freewheeling clutches doing the shifting in this transmission. Every ratio change is a timed handoff: one clutch releases while another fills and applies, and four apply components have to be holding at once to move the car. In a 10L90 that handoff is carrying far more torque than in a typical truck application, so a friction pack that has lost thickness or a piston seal that bleeds pressure shows up fast as a slip, a tie-up or a gear that feels late. Fresh frictions and seals restore the clamping force the TCM is counting on.
Steels and bushings are not included. On a unit that has been slipping under high power, expect to find blued steels; replace them rather than reuse them.
A worn valve body can burn a fresh set of clutches. GM's safety recall 25V-148 covers 2020-2022 Camaro and several Cadillac models with the 10-speed for excessive valve body wear that causes a fluid leak and pressure drop, and Sonnax lists low line pressure and burnt clutches among the complaints from worn regulator and latch valves. Read our GM 10-speed valve body recall guide and the pressure control solenoid guide to separate a hydraulic fault from worn clutches. A weak pump is the other thing to rule out, covered in our 10-speed pump failure guide.
The kit is listed for 10L90 transmissions from 2018 on, and the same kit number is offered for the 10L80. GM's 2025 fluid chart carries the 10L90 under RPO MHX in the CT5 and MHO in the Escalade, separate from the 10L80 RPOs used in the trucks, and earlier 10L90 applications include the Camaro ZL1. Because heavy-duty 10L90 clutch packs can differ from 10L80 packs in plate count and style, count your old frictions clutch by clutch against the kit before you start assembly, or send us your year and VIN to confirm. All 10-speed parts we carry are on the 10L80 and 10L90 parts page.
| Fits | 10L90 2018 |
| Part type | Banner 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.
This listing uses one kit number for both. Heavy-duty 10L90 clutch packs can differ in plate count and style, so lay each new friction set next to the old pack before assembly, or send us your year and VIN and we will check it for you.
The kit is listed for 2018-and-later 10L90 transmissions, and the Camaro ZL1 is a 10L90 application. Confirm your build year falls in that range and compare clutch packs during teardown.
Steel plates if yours are blued or warped, bushings, DEXRON ULV fluid, and a cooler or cooler flush if the old unit dropped clutch material. If testing shows a worn valve body, replace it at the same time.
Sustained high torque is hard on any clutch pack, but low line pressure from valve body wear is a common hidden cause. Have the valve body tested or replaced before installing new frictions so the same fault does not repeat.
Yes. Reset the shift adapts and complete the relearn before judging shift feel or making full-throttle runs.
