6T75 Clutch Drum, used and ready to install. Fits the 6T75. Ships fast from the USA.
The 6T75 is the higher-torque version of GM's 6T70 six-speed transaxle, and it inherited the family's most expensive habit: a 3-5-R waved plate that breaks and takes the drum splines with it. If your 6T75 has lost reverse, third and fifth, or a rebuild came back with the same failure, this used 6T75 clutch drum is the budget way to replace a housing that can no longer hold a clutch pack. At $83.99 it costs a fraction of a new assembly.
Of the five clutches in the transmission, two rotate, and both live in this drum: the 3-5-Reverse pack and the 4-5-6 pack. GM lists the drum as the 3-5-Reverse and 4-5-6 Clutch Housing Assembly. It turns with the input shaft, so the steels splined to it carry engine torque in every range except first and second. Each pack has its own piston and apply circuit, fed through rings on the case cover hub. The waved plate in the 3-5-R pack cushions the apply, and because its teeth sit in the drum splines, a plate that fractures hammers those splines on its way out.
Start with codes and a careful road test. If only 3rd, 5th and reverse are missing, the 3-5-R side of this housing is the prime suspect, but unplug the transmission first: ATRA notes that if reverse returns in failsafe, the cause is electrical. Inside, look for cracked or notched spline teeth, scored piston bores and worn ring lands. Sonnax points out that even updated OE plates still fail, so a drum with damaged splines is worth replacing rather than reusing. Our 6T70 Acadia common problems guide covers the wave plate bulletin and the other faults that hit GM's large crossovers, and the 3-4 clutch failure article explains how the two packs in this drum trade off on the upshift.
This listing is for the 6T75 and does not name a specific model year, so confirm fit before you order. The 6T75 was built across several generations, including the 2013 Gen 2 controls update, and the 6T70 version of this housing is listed as a separate part. Check the RPO code on your vehicle's label, compare shaft length and spline count with your original drum, or send us your year and VIN and we will verify. If you need a year-specific drum, our 6T70 and 6T75 parts page lists every version we stock.
| Fits | 6T75 |
| Part type | Clutch Drum |
| Condition | Used |
| 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 listing does not state a year. Send us your vehicle year and VIN, or compare the shaft length and spline count with your old drum, and we will confirm fit before you buy.
Do not assume so. The 6T75 is the heavier-duty version, and we list the housings separately. Match the part to your transmission's RPO code.
The waved plate's teeth ride in the drum splines. When the plate fractures, the loose pieces and the remaining teeth batter those splines, and a damaged drum will break the next plate too.
Special Coverage 14404B named certain 2007-2009 vehicles with the 6T70 or 6T75. That coverage ran 10 years or 120,000 miles from the in-service date, so most of those vehicles are now past it.
Dexron VI ATF, checked hot by the vehicle's procedure, followed by the shift adapt drive cycle so the TCM relearns clutch fill.
