6T75 Shift Kit 2007, new and ready to install. Fits the 6T75. Ships fast from the USA.
A 2007 6T75 is a first-production unit of the heavy-duty half of GM's six-speed front-drive family, and most of them have now lived a long life behind a big V6 in a loaded crossover. When one comes in it is usually for the same short list: upshifts that slip or flare once the vehicle is full or pulling a trailer, a converter clutch that will not settle at highway speed, bangs that show up on a hot day, or a pressure switch code from the TEHCM. This is the TransGo Gen 1 valve body repair kit pictured with the orange pressure switch diaphragms, listed here for the 2007 6T75. It is meant to go in while the valve body is on the bench, during a rebuild or a hydraulic service.
The 6T75 shifts clutch to clutch. The TEHCM solenoids decide when each clutch applies, but they can only meter the oil the valve body hands them. Three valves set that oil. The pressure regulator (PR) valve sets line pressure, the actuator feed limit (AFL) valve caps what reaches the solenoids, and the TCC regulator valve controls converter clutch apply. Years of heat and debris wear those bores, so line pressure is slow to rise, solenoid feed drifts, and converter apply wanders. TransGo replaces all three with hardened steel valves, uses a drop-in steel bushing for the AFL bore, and swaps the factory isolator valve for a relief bushing with a ball and spring. That relief is the part a heavy 6T75 benefits from most, because it bleeds off over-boost that would otherwise crack wave plates and drum parts. The kit also includes five pressure switch diaphragms and five grommets, so a 2007 TEHCM with blown switches can be renewed instead of replaced.
Pull the codes and separate electrical faults from pressure faults. An open or shorted solenoid circuit is a TEHCM or wiring problem, and no shift kit will fix it. Look at the fluid and pan. Clean Dexron VI with a pressure or TCC complaint points to the valve body. Burnt fluid and friction material mean the clutches have to be replaced too. On the big crossovers, our Traverse shift problems guide walks through the load-related flares, and the overdrive diagnosis guide shows how the gear a unit stops in tells you which clutch has failed.
This listing covers the 2007 model year 6T75. Every 2007 unit is a Gen 1 design with pressure switches in the TEHCM, which is what this kit requires. TransGo builds one Gen 1 kit for both the 6T70 and the 6T75 and rates it for 2007-13 Gen 1 units, so the same parts also suit later Gen 1 builds; see the 6T75 shift kit for 2007-2012. The kit will not fit a Gen 2 valve body. Confirm which unit you have from the transmission ID tag or the RPO code in the glove box, not from the model name, or send us your year and VIN and we will check it. Everything else we stock for this family is in the 6T70/6T75 collection.
Work one bore at a time and lay the old parts out in order. Install the relief ball and spring into the new bushing, seat it in the isolator bore, and lock it with the new retainer. For the TCC regulator, size the scarf-cut ring with the supplied O-ring in a freezer and fit the valve while it is still cold, without forcing it. Air test each pressure switch and replace the diaphragms that leak. Fill with fresh Dexron VI, then clear and relearn adapts with a scan tool. A unit that has already broken a wave plate needs its clutches renewed as well. The 6T75 overhaul kit for 2007-2012 supplies the seals and gaskets, and a 6T75 clutch drum for 2007-13 is listed if the drum is damaged.
| Fits | 6T75 2007 |
| 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.
Yes. TransGo makes one Gen 1 kit for both the 6T70 and the 6T75. Every 2007 unit is Gen 1 with pressure switches, which is what this kit is built for.
It fixes TCC hunting and slip caused by a worn TCC regulator bore. If the shudder comes from a damaged converter clutch or an engine misfire, find and fix that first, because the kit cannot repair either.
No. It restores and stabilizes pressure control and adds over-boost protection. Shifts should feel firm and consistent, not harsh, once adapts are relearned.
Renew the filter and use fresh Dexron VI. Any burnt clutches or a broken 3-5-R wave plate must be replaced, and a 6T75 overhaul kit covers the seals and gaskets for a full teardown.
Yes. Clear the old adapts with a scan tool and run the relearn, then drive the vehicle through every gear so the TEHCM can learn the new pressure response.
