6T75 Shift Kit 2007-2012, new and ready to install. Fits the 6T75. Ships fast from the USA.
The 6T75 is the heavier-duty member of GM's six-speed front-drive family, and on 2007-2012 builds it shares the Gen 1 valve body and pressure-switch TEHCM with the 6T70. If your large crossover tows a trailer or carries a full load and has started flaring between gears, chattering the converter clutch, or throwing pressure switch codes, this TransGo SK 6T70 kit (TransGo builds one kit for both the 6T70 and 6T75) is the valve body repair aimed at those complaints. It goes in during a valve body service or a full rebuild.
Heavy vehicles ask more of line pressure, and the 6T75 valve body pays for it with bore wear. When the pressure regulator valve wears, line pressure stops tracking throttle, and clutches slip during the apply instead of locking quickly. When the actuator feed limit bore leaks, the solenoids get the wrong feed pressure and every shift they time drifts. On the other side, cross-leaks through the factory isolator circuit can push line pressure too high. That over-boost is a common reason 6T75 units come back with broken parts. The kit answers each one: a new pressure regulator valve and spring, a drop-in AFL bushing and valve sized for the worn bore, and a relief bushing with a check ball that replaces the isolator valve and caps pressure. Five pressure switch diaphragms and grommets let you renew the TEHCM switches instead of replacing the module.
Check the fluid level and condition first; dark, burnt Dexron VI with friction material in the pan means the clutches need attention as well as the valve body. Scan for codes, separating electrical solenoid faults (which this kit does not fix) from pressure and ratio complaints. Our Acadia shift problems guide covers the Lambda crossover symptoms in detail, and the guide to a 6T70/6T75 that will not shift into overdrive shows how to find the failed clutch by the gear where the unit stops.
For 2007-2012 Gen 1 6T75 transmissions with the pressure switch TEHCM. Gen 2 units from about 2013 on have no pressure switches and need a different kit. If yours is a 2013-up unit, see the 6T75 shift kit 2013 listing. The 6T70 and 6T75 can share vehicle nameplates in these years, so read the transmission ID tag or RPO code rather than going by model name alone, or send us your year and VIN. Everything we carry for this family is in the 6T70/6T75 parts collection.
Lay the valve body out on a clean bench and work one bore at a time. Identify which isolator layout you have (TransGo shows two types) before pulling it, then drop in the relief bushing, check ball and spring and lock it with the new retainer. Look for a casting step at the TCC control valve; with a step, the original spring and retainer stay, and without one, the new parts go in. The bonded separator plate gaskets can go back in if undamaged. On the TEHCM, air test each pressure switch and rebuild only the leakers.
The kit restores hydraulics, but it cannot put back friction already burned off a towing-abused unit. If the 3-5-R or 4-5-6 drum shows heat damage, budget a 2007-up 6T75 clutch drum and a Gen 1 overhaul kit for the same job. Refill with Dexron VI, check the level hot per GM procedure, and relearn the adapts before towing again.
| Fits | 6T75 2007-2012 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. TransGo makes one Gen 1 kit for both the 6T70 and 6T75, because the two share the valve body hydraulics. The split that matters is Gen 1 (pressure switches) versus Gen 2 (none), not 6T70 versus 6T75.
It restores correct line pressure and actuator feed pressure in a worn valve body and caps over-boost, which helps clutches apply firmly under load. It does not replace worn frictions, so a slipping high-mileage unit may need clutches too.
Gen 1 units, roughly 2007-2012, have pressure switches on the TEHCM. Gen 2 units from about 2013 do not. Check the RPO code on the glovebox label or the transmission ID tag, or send us your VIN.
A new filter and fresh Dexron VI at minimum. If the pan shows heavy friction debris or the 3-5-R wave plate is broken, plan on a clutch drum and an overhaul kit along with this kit.
Yes. Clear codes and relearn the shift adapts with a GM-capable scan tool so the TCM stops correcting for the pressure errors it learned from the worn valve body.
