6T40 Clutch Drum 2012-2021, new and ready to install. Fits the 6T40. Ships fast from the USA.
Searching for a 6T40 drum because your 2012-or-later Cruze, Sonic, Encore, Trax or Malibu lost reverse, flares into 3rd or 5th, or won't take the top gears? This listing is the factory part for that rebuild. It is a brand-new ACDelco (GM OE) 4-5-6 clutch drum, part number 24263527, made for the updated 6T40 and 6T45 built from 2012 through 2021. Other GM numbers listed against it are 24230736, 24230760 and 24230761. It ships as a bare drum: one aluminum housing, with no plates, piston or snap rings.
The 6T40 uses five clutches and a low one-way clutch, and every forward gear holds two of them. This drum carries two clutches. The 4-5-6 clutch is applied in 4th with the 1-2-3-4 clutch, in 5th with 3-5-R, and in 6th with 2-6. The drum has a single O-ring groove inside for the 4-5-6 apply piston. On the outside, its 36 lugs drive the 3-5-R plates, so the same housing is loaded in 3rd, 5th and reverse too. The input speed sensor sits on the rear cover and reads the 3-5-R clutch assembly as it turns. That is why a damaged drum can show up as both a slip and a strange input speed reading.
A 6T40 that slips is not always a hard-parts problem. On 2012 and later Gen 2 units, a low fluid level, a sticking pressure control solenoid or a leaking valve body can produce the same symptoms. Read our 6T40 valve body symptoms guide and our speed sensor guide before you pull the unit. Set the fluid level hot (85-95°C) at the level set plug, the way ATRA describes. Then do a road test and log which gears slip. When the case is apart, measure the outer lugs. Wear grooves or rounded corners where the 3-5-R steels ride mean the drum is finished.
The listing covers 2012-2021 6T40 and 6T45 transmissions with the updated drum design. GM's 2012 production changeover did not happen on the same date for every model, so a 2012 build date alone is not enough to be sure. Compare your old drum's lugs and piston bore with the photo, or send us your year and VIN to check. Older 2008-2011 units use the earlier drum on our 6T40 2008-up clutch drum page. The 6T45 version of this listing is the 6T45 2012-2021 drum.
| Fits | 6T40 2012-2021 |
| Part type | Clutch Drum |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
A 2014 Cruze with the 6T40 falls inside the 2012-2021 range this drum is listed for. Compare the lugs and piston bore to your old drum, or send us your VIN before ordering.
Yes. Both carry the same GM 24263527 4-5-6 drum, because the 6T40 and 6T45 share this housing in the 2012-2021 units.
Two of them. The 4-5-6 piston is inside it, and the 3-5-R plates ride on its 36 outer lugs. Between the two, the drum is working in 3rd, 4th, 5th, 6th and reverse.
It can. The 6T40 input speed sensor reads the 3-5-R clutch assembly, so damage or a wobble there can upset the signal. Test the sensor and wiring first, since they are far cheaper to replace.
A master rebuild kit (frictions, seals, gaskets), an updated 3-5-R wave plate, a new filter, Dexron VI fluid, and a scan tool that can run a fast learn after the unit goes back in.
