6T75 Overhaul Kit 2007, new and ready to install. Fits the 6T75. Ships fast from the USA.
The 6T75 is the heavy-duty version of GM's six-speed front-drive transaxle, and in 2007 it went into the first-year GMC Acadia and Saturn Outlook crossovers. If yours has lost reverse, 3rd and 5th, engages slowly on a cold morning, or weeps fluid from the side cover, the unit is coming apart anyway. This new overhaul kit is the gasket and seal set for that teardown. The package in the photo is labeled as an overhaul kit for the generation 1 6T70/6T75, which is the design used in every 2007 unit.
ATRA's introduction to this family lists what makes a 6T75 different from a 6T70: a shot-peened output carrier, a five-pinion carrier, a wider transfer gear, a heavier differential carrier and a heavier ribbed case. GM rated it for 299 lb-ft and 4,500 lb of towing against the 6T70's 280 lb-ft and 1,000 lb. None of that changes the hydraulics. Both share the same five clutches (1-2-3-4, 2-6, 3-5-Reverse, 4-5-6 and Low/Reverse), all applied clutch to clutch by pistons with rubber seals, with no shift valves and only one accumulator. That makes the seals the whole show. A piston seal that leaks a little lets a clutch apply late or soft, and the internal control module can only add so much pressure before it sets a code. The overhaul kit supplies the piston seals, sealing rings, gaskets and O-rings so every circuit holds again once the case is closed.
Before you pull the transaxle, unplug the transmission connector and select reverse. ATRA's product-issues seminar uses this as the dividing line: if reverse engages with the connector off, the hard parts are holding and the fault is electrical. If it still will not move, pull the pan and look for wave plate fragments. Our Acadia common problems guide covers the 2007-2009 failures in order, and the Acadia shift problems guide separates adapt and solenoid complaints from mechanical ones. The 6T70 common problems overview applies to the 6T75 as well.
This listing is for a 2007 6T75. Check the RPO label in the glovebox: MY9 is the front-drive 6T75 and MH6 is the all-wheel-drive 6T75. A label showing MH2 or MH4 means you have a 6T70 and should look at the 2007 6T70 overhaul kit instead. Year matters inside Gen 1 too: in Special Coverage 14404B GM called for one seal kit on 2007-2008 units and a different one on 2009 units, so do not assume a 2009 kit is the same. Gen 2 hardware started showing up in 2013. If your year or build date is borderline, send us the year and VIN before ordering. Every 6T70 and 6T75 part we carry is on the 6T70/6T75 collection page.
| Fits | 6T75 2007 |
| Part type | Overhaul 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.
The package is labeled for the Gen 1 6T70/6T75, and the two share their sealing parts, but this listing is sold for the 2007 6T75. If your RPO code is MH2 or MH4 you have a 6T70, so compare against the 2007 6T70 kit or send us your VIN and we will confirm.
No. An overhaul kit is the seals, sealing rings, gaskets and O-rings. Frictions, steels and the wave plate are separate parts. If you are fixing a no-reverse, no-3rd, no-5th complaint you also need a new 3-5-Reverse wave plate and the frictions in that pack.
Look at the service parts label in the glovebox. MY9 is the front-drive 6T75 and MH6 is the all-wheel-drive 6T75. MH2 and MH4 are 6T70 codes.
Dexron VI only. GM's owner manuals for these crossovers specify DEXRON-VI, and the level should be checked hot. A rebuilt unit takes more than a pan drain and refill, so plan on a full case of fluid.
Yes. Clear the adapts and run the shift adapt learn with a scan tool, or drive the vehicle through repeated light-throttle upshifts. Skipping it leaves harsh or soft shifts that look like a bad rebuild.
