6T75 Input Drum 2007, new and ready to install. Fits the 6T75. Ships fast from the USA.
If you are rebuilding a 2007 6T75 and the old input drum came out with chewed splines, a scored ring land or a loose reluctor wheel, this is the replacement. It is a new 6T75 input drum for 2007 transmissions: the input shaft with the clutch housing on its end, shown in the photo as a bare housing ready to be built up. Most buyers are mid-rebuild on a launch-year unit after the classic no Reverse, no 3rd, no 5th failure.
The 6T75 is the higher-capacity member of GM's 6T70/6T75 front-drive six-speed family, and its input drum works the same way. The shaft is driven by the converter turbine, so the housing turns any time the engine is pulling. Inside the housing sit two of the transmission's five clutches: the 3-5-Reverse clutch and the 4-5-6 clutch, each with its own apply piston. GM's parts breakdown names the whole assembly the 3-5-Reverse and 4-5-6 Clutch Housing Assembly. Fluid reaches each piston through sealing rings riding on the stationary hub, and a toothed reluctor ring on the outer shell gives the input speed sensor its signal. One part therefore drives half the gear chart and also tells the TCM how fast the input is turning.
Note which gears are missing before the unit comes out. GM tied the no Reverse, 3rd or 5th complaint on 2007-2009 6T70/6T75 vehicles to a broken 3-5-R wave plate, and our 6T70 Acadia common problems guide walks through that pattern on the crossovers that used these units. If the complaint is a shudder or harsh shift with every gear still present, read the 6T70 common problems and fixes guide first, since valve body and TEHCM faults produce shift complaints without hard-part damage. On the bench, a broken wave plate alone does not condemn the drum. Replace the drum when the internal splines are notched, the ring lands are stepped, the bushing journals are scored or the reluctor ring is damaged.
Listed for 2007 6T75 transmissions. Read the RPO code on the vehicle's Service Parts ID label to confirm you have a 6T75 and not the lighter 6T70, which uses its own drum; for a 6T70 see the 6T70 input drum 2007. Before installing, lay your old drum next to this one and compare shaft length, the turbine spline, the internal clutch spline and the position of the reluctor ring. If anything looks different, stop and send us your year and VIN so we can check it. Every 6T70 and 6T75 part we carry is on the 6T70/6T75 transmission parts page.
| Fits | 6T75 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.
The photo shows the housing and input shaft without clutch plates. Plan on installing new frictions, steels, an updated wave plate and piston seals from a 6T75 overhaul kit, then air check and set clearances.
Do not assume so. The 6T75 is the higher-capacity version of the family and its internals differ. Confirm 6T75 on the RPO label and match the drum to your old part, or send us the year and VIN.
No. The usual cause is a broken 3-5-R wave plate, which sets P0776. The drum only needs replacing if the splines, ring lands, bushing journals or reluctor ring are damaged when you inspect it.
Dexron VI. Check the level with the transmission at operating temperature and run the adaptive reset and relearn after installation.
New sealing rings, piston seals, frictions, steels and an updated wave plate, plus the pump fluid filter and solenoid filter plate. Flush the cooler so old debris does not come back into the new parts.
