6T30 Sprag Clutch, new and ready to install. Fits the 6T30. Ships fast from the USA.
This listing is named for a sprag, but the part in the box is the 6T30 clutch housing that carries the 3-5-reverse and 4-5-6 clutches, OE number 24231648 (industry interchange 133550). It is a new aftermarket housing made to the original pattern, produced in South Korea. Builders shop for it after opening a small-engine Chevrolet Cruze or Sonic six-speed that lost reverse or started slipping into third and fifth, and finding the drum splines hammered by pieces of a broken wave plate. If you need the actual one-way clutch instead, see the note under Fitment.
GM built the 6T30 as the light-duty version of the 6T40 and 6T45, with the same five-clutch, no-band layout. Each forward gear and reverse is two clutches applied together, and this one housing holds two of the five packs. The 3-5-R pack is on in third, fifth and reverse. The 4-5-6 pack is on in fourth, fifth and sixth, so in fifth gear both packs in this housing are clamped at the same time. The housing turns with the input, its inner and outer splines locate the steel plates, and the pistons for both packs ride inside it, fed through sealing rings. When the splines or the piston bores are damaged, nothing bolted into the housing can hold properly, no matter how good the new frictions are.
Sonnax traced the 3-5-R wave plate failure across Gen 1 through Gen 3 units of this family to cracks that start at the plate's tooth corners. Once a plate breaks, the pieces chew the housing lugs, and later plates can bind in the notches.
Missing gears are not always mechanical. GM's PI0670A ties no reverse and third or fifth slips with P0776 to this clutch, but it also has the technician check fluid level and controls before tearing down. Set the level hot, read codes and note which gears are gone. Our shift solenoid symptoms guide explains how a stuck solenoid can drop the same gears, and the common problems guide covers the wave plate failure in detail. With the unit apart, look at the lugs: any step, notch or burr where the steels ride, or a cracked lug, means the housing is done.
The listing gives 24231648 as the OE number and calls it a 6T30 part, which places it in the 1.8L Cruze and Sonic and other small-engine GM cars that used the 6T30. The listing does not give model years, and the 6T30 went through Gen 1 and Gen 2 changes, so compare the stamped number and the lug and bore layout on your old housing before you order, or send us your year and VIN. If what you actually need is the low one-way clutch for a first-gear slip, the 6T30 low one-way clutch for 2013-up is that part.
| Fits | 6T30 |
| Part type | Sprag Clutch |
| Condition | New |
| Brand | OEM |
| Reference | 24231648 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is the 3-5-R and 4-5-6 clutch housing (drum), OE 24231648, interchange 133550. It is not a one-way clutch. For a first-gear slip caused by the one-way clutch, look at our 6T30 low one-way clutch listing instead.
No. It is the housing only. Plan on new piston seals or pistons, sealing rings, frictions, steels and the wave plate when you install it.
GM used the 6T30 behind its smaller engines, including the 1.8L Chevrolet Cruze and Sonic. Match the number on your old housing to 24231648 or send us your year and VIN before ordering.
The most common cause in this family is a cracked wave plate. Cracks start at the plate's tooth corners, and once it breaks the pieces damage the housing splines and the clutch can no longer hold reverse, third and fifth.
Yes. Clear the shift adapts with a scan tool and drive the car through all gears so the module relearns the clutch fill times. Expect shifts to feel slightly off until it finishes.
