6T70 Clutch Drum 2007-13, new and ready to install. Fits the 6T70. Ships fast from the USA.
Rebuilders who open a 2007-13 6T70 after a no-Reverse complaint usually find the same thing: a 3-5-R wave plate broken at the teeth and a drum with chewed splines. This listing is a new GM-branded 6T70 clutch drum, the 3-5-Reverse and 4-5-6 clutch housing with its input shaft, for owners and shops who would rather start the rebuild with a clean housing than dress up a damaged one.
Most of the 6T70's clutches are held to the case. This one spins. The drum is driven by the input shaft and carries two apply pistons, one for the 3-5-Reverse clutch and one for the 4-5-6 clutch, each sealed with inner, outer and dam seals. Fluid for both pistons comes through sealing rings at the case cover. The outside of the drum also mounts the input speed sensor reluctor wheel, so the TCM reads turbine speed directly off this part. A drum with worn ring lands bleeds apply oil, and a drum with damaged splines lets the plates move and hammer, which is how a single failed plate turns into slipping, flares and debris through the whole unit.
Start with the codes and the missing gears; our 6T70 common problems and fixes guide lays out which complaints come from this drum and which come from the valve body or TEHCM. If the unit is already out, look closely at the inside splines where the wave plate and steels engage. Sonnax found that broken OE wave plates separated at a tooth corner and usually damaged the drum splines on the way out. Also spin the drum on the case cover hub and feel for rough bushings. Equinox and Impala owners will find the shift-complaint side of this unit covered in our 6T70 Equinox shift problems guide.
Listed for 2007-13 6T70 units. GM's wave plate coverage named 2007-2009 vehicles with RPO codes MH2, MH4, MH6 and MY9, and the 6T70 kept changing through 2013, so years alone are not a guarantee. Check the RPO on the Service Parts ID label and compare your old drum against the photo, especially shaft length, splines and the reluctor wheel. Send us the year and VIN if you want us to confirm before shipping. Every other 6T70 part we stock is on the 6T70 collection page.
| Fits | 6T70 2007-13 |
| Part type | Clutch Drum |
| Condition | New |
| Brand | GM |
| 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 listed as new and branded GM. Inspect it on arrival and compare it to your original housing before assembly.
Check the internal splines, piston bores, sealing ring lands and bushings. Notched splines from a broken wave plate or a scored ring land means replace it.
The 3-5-Reverse clutch and the 4-5-6 clutch. Between them they work in 3rd, 4th, 5th, 6th and Reverse, which is why a damaged drum affects so many gears.
A master rebuild kit or overhaul kit with pistons and seals, a new 3-5-R wave plate, the pump fluid filter, and enough Dexron VI to fill and flush the unit.
No new programming is required for a drum swap, but the TCM adaptive values should be reset and relearned with a scan tool so shifts come out right.
