4L70E Clutch Drum, used and ready to install. Fits the 4L70E. Ships fast from the USA.
If your 2006-2013 Silverado, Sierra, Tahoe, Yukon or Trailblazer SS came back from the shop with a pan full of band material, slips in 2nd and Overdrive, or backs up only after a long pause, the problem is often a drum that can no longer hold. This is a used OEM GM clutch drum for the 4L70E, priced at $81.99 so you can replace a damaged housing for a fraction of the cost of new hard parts. It ships from the USA and carries a 1-year warranty.
The 4L70E has two clutch housings that people casually call the drum: the input housing that carries the forward, overrun and 3-4 clutches on the turbine shaft, and the reverse input drum that the 2-4 band wraps around. The listing photo shows a smooth outer band surface with a castellated, tabbed rim at the open end and steel plates inside, which is the layout of the reverse input drum. Hold your old part next to the photo before you order. If yours has a long splined input shaft pressed into it, you need an input housing instead, such as our 4L70E input drum listing.
In this transmission the drum works as a reaction member. When the 2-4 servo squeezes the band onto the outer surface, the drum is held still, and because its rim tabs lock into the reaction sun shell, the sun gear is held with it. That gives you 2nd and 4th gear. In Reverse the band lets go and the reverse input clutch inside the drum applies, so engine torque drives the drum and sun shell instead of holding them. A drum with a glazed, dished or cracked band surface, worn tabs, or a leaking piston will show up in three different ranges, which is why it gets misdiagnosed so often.
Sonnax catalogs 2-4 band burned and burnt or delayed Reverse among the recorded complaints for this unit, alongside the better known 3-4 clutch failure.
A good drum will still slip if the hydraulics are weak, so rule out low line pressure, a leaking servo and solenoid faults first. Our 4L70E common problems guide walks through those checks. If the complaint is that the truck loses 4th and flares into 3rd, read the 3-4 clutch failure guide, because that pack lives in the input housing, not this drum. With the unit apart, lay a straightedge across the band surface, look for heat checking and blue discoloration, check the tabs for wear or cracks, and air-check the reverse piston.
The listing names the 4L70E without a specific year, and the vehicles that came with this unit are the 2006-2013 Chevrolet Silverado, Tahoe and Trailblazer SS and the GMC Sierra and Yukon, plus some Cadillac and Pontiac models. Because GM shares many hard parts across the 4L60E, 4L65E and 4L70E but did revise some of them, match tab count, bushing bore and overall height against your old drum, or send us the year and VIN and we will check before it ships. Our interchange guide explains what moves between the three units, and every part for this transmission is in the 4L70E collection.
| Fits | 4L70E |
| Part type | Clutch 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.
The photo shows a band surface and a tabbed rim, which is the reverse input drum the 2-4 band wraps around. Compare it with your old part; if yours has a long input shaft, you need an input housing instead.
The 2006-2013 Chevrolet Silverado, Tahoe and Trailblazer SS, GMC Sierra and Yukon, and some Cadillac and Pontiac models. Send us your year and VIN if you are not sure which unit you have.
Not always. Slipping in 4th can come from the 2-4 band and this drum, but a burned 3-4 clutch in the input housing is the more common cause. Check the pan debris and test line pressure first.
A new 2-4 band, reverse input piston seals, and the frictions in the reverse pack. Inspect the pump hub bushing surface as well.
No. It is a used OEM GM housing with a 1-year warranty, so plan to inspect and reseal it before installation.
