6T40 Clutch Drum, new and ready to install. Fits the 6T40. Ships fast from the USA.
A Chevy Cruze, Malibu, Equinox, Sonic or GMC Terrain with a 6T40 that drives forward but will not back up, or slips going into third and fifth, very often has a broken 3-5-R waved plate and a damaged clutch housing behind it. This listing is a new 6T40 3-5-R and 4-5-6 clutch drum built to original equipment specifications, interchanging with GM 24253300 (industry number 144550). It is the housing only; the input shaft, pistons, plates and seals transfer from your unit or come from a rebuild kit.
The 6T40 makes six forward speeds by applying clutches in pairs, and this input-driven housing holds two of the most heavily used packs. The 3-5-R clutch works in third, fifth and reverse; the 4-5-6 clutch works in fourth, fifth and sixth. The input speed sensor reads this assembly as it turns, so the transmission control module uses it to calculate gear ratio and clutch slip. When the drum splines are damaged or the piston bores leak, the module sees the slip and sets ratio codes.
Sonnax reports that the factory 3-5-R waved plate cracks at the tooth corners in Gen 1 units especially, and still fails in later units with the updated shot-peened plate. When it breaks, it damages the drum splines.
Not every missing gear is a hard-part failure. GM bulletin PI1131 traces several missing-gear conditions in this family, including P0776 and P2714, to a pressure control solenoid that stopped working, which is a valve body and control module repair rather than a teardown. Check fluid level and condition, scan for codes and run GM's solenoid performance test on 2012-up Gen 2 controls. Our 6T40 shift solenoid guide covers that testing, and the 6T40 common problems guide explains when a teardown is the next step. GM also warns that an air check of the 3-5-R clutch through the case is not reliable; the housing and piston have to be inspected with the unit apart.
This drum is listed for the 6T40 without a specific year range. The 6T40 went into the Cruze, Malibu, Equinox, Terrain, Sonic, Regal, Verano and Encore over many years, and GM made running changes, including the 2012 move to Gen 2 controls. Match GM 24253300 to the number on your old housing, compare the ring and spline layout to the photo, and send us the year and VIN if you are unsure. We also stock the 6T40 clutch drum for 2012-2021 and the 2008 6T40 drum; other drums, planetaries and housings are in the hard parts section.
Clean the old shaft and inspect its journals and sealing ring grooves before fitting it into the new housing. Replace the bonded pistons rather than reusing them; ATRA's GEARS team found cracked and heat-shrunk pistons in this family. Install new sealing rings, a new waved plate, new frictions and steels, set clearance, and air check both packs on the bench. The 6T45 master rebuild kit for 2012 covers the soft parts for later units of this shared design; confirm it matches your generation. Flush or replace the cooler, refill with Dexron VI, set the level hot at the check plug, then clear adapts and complete a relearn drive.
| Fits | 6T40 |
| Part type | Clutch Drum |
| Condition | New |
| Brand | OEM |
| Reference | 24253300 |
| Ships | From the USA |
| Warranty | 1-year |
The new 3-5-R and 4-5-6 clutch housing only. The input shaft, pistons, waved plate, frictions, steels and seals are not included.
It is listed for the 6T40. Because GM revised the housing over the years, match GM 24253300 to your old part or send us your year and VIN before ordering.
No. GM has traced missing gears with P0776 to a failed pressure control solenoid. Test the solenoids and check fluid first; replace the drum only if the splines or bores are damaged.
No. That plate is the usual cause of drum damage in the 6T40. Install a new updated or aftermarket plate with the housing.
Refill with Dexron VI, check the level hot at the level set plug, clear the adaptive values with a scan tool and drive through every gear so the module relearns the clutches.
