6L80 Shift Kit 2010, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
Be clear on what this is before you order: the listing name says shift kit, but the item is a complete remanufactured valve body assembly for 2010 and later 6L80 and 6L90 transmissions, not a bag of springs and valves. Every unit is vacuum tested and dyno tested before it ships. Plenty of owners shop for a shift kit because their 2010-up Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade or Camaro flares on the 2-3, bangs into gear, or slips once hot. When the aluminum bores in the factory casting are worn, a shift kit cannot seal them, and a tested replacement body is the better fix.
The TEHCM bolted to the bottom of the valve body decides when to shift and commands solenoids, but those solenoids only produce small signal pressures. The valve body turns them into clutch apply pressure through a regulator and boost valve for each clutch, a pressure regulator for line pressure, and an actuator feed limit valve that sets the supply every solenoid works from. Thousands of cycles wear the bores that those valves slide in. Oil leaks past, pressure goes soft or erratic, and the computer keeps trying to adapt around a hydraulic problem it cannot see.
Check fluid level and condition first; low or burnt Dexron VI causes slips on its own. Reset transmission adapts and drive the relearn, since GM's own correction for some harsh 6L80 shifts is just that. If the complaint survives, put a gauge on the line pressure port and compare it with commanded pressure while stepping the pressure control solenoid with a scan tool, the test Gears Magazine lays out. Pressure that lags or drops points at the valve body or pump, not at the clutches. Our 6L80 shift solenoid symptoms guide helps separate a bad TEHCM from a worn body, and if the problem is lost upper gears, read 6L80 won't shift into overdrive.
This assembly is listed for 2010 and later 6L80 and 6L90 units. Those years do not all share one upper body. GM bulletin 16-NA-130 explains that upper valve bodies are unique to the transmission RPO, identified by which of four lettered posts is milled off, and that the wrong one leaves you with no Reverse, no second gear and missing input and output speed signals. Read the RPO on your glovebox or door sticker (MYC for the 6L80, MYD for the 6L90), check the post on your old casting, and send us your year and VIN before buying so the right body ships. Other options are in our 6L80 parts collection.
Drop the pan and filter, unplug the TEHCM, and remove the valve body and TEHCM together. Transfer your TEHCM to the new body unless we confirm otherwise for your order, keep it clean, and torque the bolts in sequence to spec. Fit a new filter and case seal and fill with Dexron VI through the check plug with the fluid at the specified temperature. Reset adapts and complete a relearn before judging shift quality. Want firmer towing shifts on top? The TransGo 6L80-TOW&PRO kit is the calibration upgrade, and the Superior STL-6L80E kit is an alternative for builders working on their own casting.
| Fits | 6L80 2010 |
| Part type | Shift Kit |
| Condition | Remanufactured |
| 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 a complete remanufactured 6L80/6L90 valve body assembly for 2010 and later units, vacuum tested and dyno tested. The listing name says shift kit, but no separate spring and valve kit is included.
It is listed for 2010 and later. Upper valve bodies are specific to the transmission RPO and milled post, so send us your year and VIN and we will confirm before it ships.
Plan to move your existing TEHCM to this body. A replacement TEHCM must be programmed to the vehicle, so keeping yours avoids that step.
Yes, a calibration kit like the TransGo 6L80-TOW&PRO can be installed in a good valve body for firmer shifts. Follow the kit instructions with the body on the bench.
Refill with Dexron VI at the check plug, reset transmission adapts and run a relearn with a scan tool. Shift quality settles as the TCM learns the new hydraulics.
