6T70 Clutch Drum 2011, used and ready to install. Fits the 6T70. Ships fast from the USA.
If your 2011 Equinox, Terrain, Malibu or LaCrosse with the 6T70 six-speed has dropped reverse, third and fifth, or the teardown shows chewed-up splines on the clutch drum, this is the part that ends the search. It is a used GM 6T70 clutch drum taken from a 2011 unit, shown in the photo with the input shaft attached, priced well under what a new housing costs. Buying the drum by itself makes sense when the rest of the hard parts in your case still check good.
GM's service information calls this part the 3-5-Reverse and 4-5-6 Clutch Housing Assembly. It is the only rotating clutch drum in the 6T70: the 1-2-3-4, 2-6 and low/reverse clutches are held in the case, while the two packs in this housing turn with the input shaft. The 3-5-R pack applies in third, fifth and reverse. The 4-5-6 pack applies in fourth, fifth and sixth. On the 3-4 upshift the transmission hands torque from one pack to the other inside this same housing, so a leak or a damaged spline here shows up as a shift problem before it becomes a no-move. Apply oil for both pistons arrives through sealing rings riding on the case cover hub.
Note which ranges are gone. Losing only 3rd, 5th and reverse points at the 3-5-R side of this housing. Before you pull the unit, ATRA's quick check is to unplug the transmission connector: if reverse comes back in failsafe, the fault is electrical and the drum is likely fine. Our 6T70 3-4 clutch failure guide walks through separating a pack failure from a valve body or adapt issue. Once the drum is out, inspect the splines where the waved plate sits. Sonnax notes that a broken plate usually damages those splines, and a damaged drum will eat the next plate too.
This drum is listed for 2011 6T70 units. GM's wave plate trouble was concentrated in 2007-2009 transmissions and ATRA's update advice targets 2010 and earlier, so a 2011 drum comes from the later production run, before the 2013 Gen 2 controls change. The 6T70 and the heavier 6T75 share the family name but use different RPO codes, so read the RPO label in your glovebox or trunk, compare the shaft length and spline count against your old drum, or send us your year and VIN before ordering. Every 6T70 part we carry is on the 6T70 parts page.
| Fits | 6T70 2011 |
| Part type | Clutch Drum |
| Condition | Used |
| 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 for 2011 units. Many Gen 1 6T70 housings look alike, but we do not guarantee interchange across years. Compare shaft length and spline count with your old drum, or send your year and VIN and we will check before you order.
The product photo shows the housing with the input shaft attached. If you need to confirm a specific detail before buying, contact us with your question and we will check the part.
If the drum splines are smooth and the ring lands and piston bores are clean, a new waved plate and clutch pack may be enough. If the splines are notched, peened or cracked from a broken plate, replace the drum, because a new plate will not survive in a damaged housing.
Dexron VI ATF. Check the level hot using the procedure for your vehicle, then run the shift adapt drive cycle.
P0776 is the classic code for a lost 3-5-R apply, and a broken wave plate can also set P0777, P2715, P2723, P0716 or P0717. A 3-4 bind with P0797 points more often at the case cover hub rings than at the drum itself.
