6T70 Input Drum 2007, new and ready to install. Fits the 6T70. Ships fast from the USA.
Searching for a 6T70 input drum usually means the teardown is already done and the shaft-and-drum assembly at the front of the gear train is scored, cracked or full of broken plate teeth. This is a new input drum for 2007 6T70 transmissions, the part that takes engine torque off the converter and carries the input speed sensor target. It suits a rebuild on an early Acadia, Outlook or other GM front-drive model where the old drum is no longer worth saving.
Shops call this part an input drum because the input shaft is pressed into it and it is the first rotating member after the converter. In GM's own parts breakdown it is the 3-5-Reverse and 4-5-6 Clutch Housing Assembly, so it is the same assembly some catalogs list as a clutch drum; our 6T70 clutch drum 2007 listing is this style of housing under the other name. Its job has three parts. The shaft spline takes turbine torque from the converter. The housing holds the 3-5-R and 4-5-6 clutch packs and both of their apply pistons, fed by sealing rings at the case cover. And the reluctor wheel on its outer shell is what the input shaft speed sensor reads, which the TCM compares to output speed to command and verify every shift.
Start with a scan and a careful road test. A clean loss of 3rd, 5th and Reverse is the classic 6T70 wave plate failure, and our 6T70 common problems and fixes guide shows how that differs from the valve body and TEHCM faults this unit is also known for. On a Traverse, Equinox or Impala with shift complaints but no lost gears, read the 6T70 Equinox shift problems guide before pulling the transmission. If the unit is already out, inspect the input shaft splines, the ring lands on the hub, the drum's internal splines and the reluctor wheel. Sonnax's analysis of broken wave plates found the drum splines damaged in most cases, so look closely there.
Listed for 2007 6T70 units. The 6T70 shares its design with the heavier 6T75, and GM changed internal parts as the family evolved, so match your transmission rather than just the year. Read the RPO code on the Service Parts ID label to confirm 6T70, then compare your old drum to the photo: input shaft length and spline, the drum's internal spline and the reluctor wheel should all match. If you would rather we check it, send the year and VIN with your order question. Other drums and every part we carry for this family are on the 6T70 transmission parts page.
| Fits | 6T70 2007 |
| Part type | Input Drum |
| 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.
On this unit, yes. Both names are used for the 3-5-Reverse and 4-5-6 clutch housing with the input shaft attached. Compare the photo with your old part to be sure you are looking at the right assembly.
The photo shows the drum and input shaft assembly. Inspect your old reluctor wheel and retainer ring; if either is damaged, ask us before ordering so we can confirm what is included.
This listing is for the 6T70. The 6T75 uses its own parts in several places, so 6T75 owners should use a 6T75 drum listing or send us their VIN.
The 3-5-R wave plate is the usual starting point, and its fragments can damage the drum splines, the other clutch packs and the valve body. Expect to replace frictions, steels, seals and filters at the same time.
Yes. Clear codes, reset the transmission adapts with a scan tool and complete a relearn drive so shift timing is learned for the new clutches.
