6L90 Input Drum 2007, used and ready to install. Fits the 6L90. Ships fast from the USA.
If your 2007-up 6L90 slips in the lower gears, has lost Reverse, or keeps burning the clutches in its input housing after a rebuild, the input drum itself may be the part that failed. This listing is a used original GM 6L90 input clutch housing, the 1-2-3-4 / 3-5-Reverse drum, from a 2007 or later unit. It comes as a complete assembly with steels and clutches in place, which makes it a practical swap for HD Silverado, Sierra, Express, Savana and 2500 Suburban owners who need the truck back on the road.
The input drum is splined to the turbine shaft, so it spins at converter output speed whenever the engine is running in gear. Inside it are two packs: the 1-2-3-4 clutch, which drives the planetary set for the first four ratios, and the 3-5-Reverse clutch, which carries power in third, fifth and Reverse. Both pistons get their apply oil through sealing rings on the stator support. That means a problem anywhere in this drum shows up in more than one gear, and it often looks like a pressure or solenoid fault before anyone opens the case.
Several cheaper failures produce the same slip. The Gears Magazine write-up on 6L80/6L90 forward slip traces it to the number one check ball in the upper valve body wearing undersize and leaking 1-2-3-4 apply oil, and GM classifies some 2-3 flare as a normal characteristic with no repair needed. Start with a scan for codes, a hot line pressure check and a look at the pan. If the unit is already apart, air-check both pistons and look at the drum weld; a leak there condemns the housing. Our 6L90 3-4 clutch failure guide covers the forward-slip side and the Silverado 2500 shift problems guide helps separate drum faults from valve body faults.
Listed for 2007 and later 6L90 (RPO MYD) transmissions, the heavy-duty six-speed in Silverado and Sierra 2500HD/3500HD, Express and Savana vans, and the 2500-series Suburban and Yukon XL. The 6L80 uses smaller internal parts in this area and is not interchangeable. GM changed internal parts over the 6L90's run, so compare the spline count, the drum height and the sealing ring bore of your old drum with this one, or send us your year and VIN and we will check it. This is the same drum sold on our 6L90 clutch drum 2007 page; you only need one. Browse the full 6L90 parts collection for everything else in the unit.
| Fits | 6L90 2007 |
| Part type | Input 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.
No. In the 6L90 the input drum is the 1-2-3-4 / 3-5-Reverse clutch housing. Both listings are the same used OEM part, so order only one.
Yes, it is supplied as a complete drum with steels and clutches installed. Inspect and measure them before reuse, since it is a used part.
2007-up GM vehicles with the 6L90 (RPO MYD), such as the Silverado and Sierra 2500HD/3500HD, Express and Savana 2500/3500 and 2500 Suburban. Check the RPO label or send us your VIN.
Yes. A worn number one check ball in the upper valve body or a worn clutch regulator bore can starve the 1-2-3-4 clutch. Check line pressure and codes before replacing the drum.
Dexron VI only. Set the level hot with the engine running, then clear adaptives and run the adaptive learn.
