10L80 Shift Kit, new and ready to install. Fits the 10L80. Ships fast from the USA.
This is the RatioTek Trans Tuner Kit, part number RT-10L80-PRX, a valve body kit for the GM 10L80 ten-speed. The box is labeled for correcting and reducing shift complaints and for increased torque capacity, and inside are a set of color-coded calibrated springs, a machined sleeve, a check ball, a pin and a small drill bit used during installation. It is aimed at the Silverado 1500, Sierra 1500, Tahoe, Suburban, Yukon or Escalade owner who tows, has added power, or is rebuilding a 10L80 and wants the shifts to apply firmer and with less slip time than the factory calibration allows.
The 10L80 is electronically controlled: the TCM commands a set of solenoids mounted directly in the valve body casting, and each solenoid moves a regulating valve that feeds a clutch. A shift on this transmission is a hand-off between one clutch releasing and another applying, and ATRA's 10L diagnostic article puts that overlap at roughly three tenths of a second. When springs fatigue and valve bores wear, the pressure behind that hand-off drops and the clutch slips longer than it should, which is heat, glazed frictions and eventually a flare you can feel. A spring-and-valve kit like this one changes the hydraulic balance in the valve body so the regulated pressures hold up under load. It does not reprogram the TCM, so it works alongside the factory shift schedule rather than replacing it.
A shift kit is not a cure for a failed solenoid or a damaged valve body casting, and the 10L80 has a long list of those. GM issued a 2025 safety recall on '19-later 10-speed valve bodies for wheel lock-up, and bulletin 22-NA-182 tells technicians to check software, fluid level and condition, and adaptive learning before tearing anything down. Work through our 10L80 harsh shift guide first, then the valve body symptoms and testing guide. If the valve body passes and the complaint is soft or slipping shifts under load, this kit is a sensible upgrade. If the casting or solenoid bores are worn, start with a replacement 10L80 valve body instead.
The kit is listed for the GM 10L80. That covers the 2017-up half-ton Silverado and Sierra, Tahoe, Suburban, Yukon and Escalade that use the 10L80 rather than the 10L90 or 10L60. GM has released more than one valve body generation: Sonnax documents a '19-later Gen. 2 design and a Gen. 3 service valve body released in June 2025. Check the instruction sheet in the box against the valve body in your truck before you start pulling valves, or send us your year and VIN and we will check it for you. Other parts for this transmission are on our 10L80 collection page.
| Fits | 10L80 |
| Part type | Shift Kit |
| 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.
It is the RatioTek Trans Tuner Kit, part number RT-10L80-PRX, as printed on the box. RatioTek describes it as a valve body kit to correct and reduce shift complaints and increase torque capacity.
It is listed for the GM 10L80 used in 2017-up Silverado 1500, Sierra 1500, Tahoe, Suburban, Yukon and Escalade. GM has changed the valve body over the years, so check the kit instructions against your valve body or send us your year and VIN before installing.
The kit is hydraulic only and does not change the TCM software, but you should run a scan tool fast learn afterward so the TCM relearns clutch apply pressures. Do it with the fluid between 167 and 185 degrees F.
Yes. It goes into the valve body, which comes out with the pan dropped. If the clutches are already slipping badly or the fluid is burnt, a shift kit alone will not fix that and the unit needs a rebuild.
Dexron ULV only. GM specifies it for every 10L80 application and lists 8.1 quarts for a pan and filter service. Older Dexron VI is not a substitute.
