GM Genuine 24217231 low roller clutch for the 4L60E, the one-way clutch that holds first gear in Drive. Fixes no-first or slipping first gear.
Your Silverado, Sierra, Tahoe, S10 or Camaro sits at a light in Drive with the engine revving and barely creeps, yet it pulls away normally the moment you pull the shifter down to manual Low. That is the classic sign of a worn low roller clutch in a 4L60E, and this is the factory GM part for it, number 24217231, a GM Genuine Parts piece rather than an aftermarket copy. It weighs about 5 ounces and ships from the USA.
The low roller clutch is a one-way clutch at the rear of the gear train. It uses cylindrical rollers in a cage, each pushed by a small accordion spring against a cam ramp. Turn the races one way and the rollers wedge and lock; turn them the other way and they drop into the deep end of their pockets and release. In the 4L60E the center support acts as its outer housing and is snap-ringed into the case.
In first gear in Drive this clutch alone holds the rear carrier against rotation, with no hydraulic apply involved. When the transmission shifts to second, the carrier starts turning the other way and the rollers freewheel, which gives a smooth 1-2 shift without two clutches having to hand off. In manual Low and Reverse the low/reverse clutch pack applies and holds the same carrier, which is why a vehicle with a slipping roller clutch still drives in Low.
Unlike a sprag, which often fails all at once, a roller clutch usually wears gradually, so the complaint can come and go before it stops holding completely. This part will not fix the 4L60E's other well-known failures, such as a stripped sun shell or a burned 3-4 pack, so match the symptom before you buy.
Transmission Digest lays out the simplest test: if the vehicle moves in manual Low but did not move in the other forward ranges, the low roller clutch is not holding. Do it on a level surface with the fluid full and warm. If the vehicle has no reverse and no engine braking in Low but drives fine in Drive, that is the opposite problem, covered in our 4L60E low-reverse clutch failure guide. Our breakdown of 4L60E sprag and roller clutches explains how to separate this part from the forward sprag up front.
GM 24217231 is the low roller clutch assembly for the GM 4L60E, which was used in 1993 and later rear-drive trucks, SUVs and cars such as the Silverado and Sierra 1500, Tahoe, Yukon, Suburban, S10, Blazer, Camaro and Corvette. The 4L65E and 4L70E share much of the same gear train, but GM made running changes across that long production run, so compare the new assembly with your old roller clutch and center support before you install it. If you are unsure, send us your year and VIN. If the unit is fully apart, the Borg Warner forward and low sprag set replaces both one-way clutches together. Everything else for this transmission is in our 4L60E collection.
| Part number | GM 24217231 |
| Brand | GM Genuine Parts (ACDelco) |
| Transmission | GM 4L60E |
| Type | Low roller clutch (one-way clutch) assembly |
| Condition | New, OE |
| Item weight | 5.1 oz |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is GM's low roller clutch assembly for the 4L60E automatic used in 1993 and later trucks, SUVs and cars. Compare it with your old part before installing, or send us your year and VIN to confirm fitment.
In manual Low the low/reverse clutch pack holds the rear carrier, so the low roller clutch is not needed. If the vehicle only moves in Low, the roller clutch is the part that is slipping.
No. It sits inside the case at the center support, so the transmission must come out and the gear train must be disassembled.
Replace it if it shows pitting, scoring or a worn groove. A damaged race will wear out a new roller clutch quickly.
Dexron VI ATF. Flush the cooler and lines if the old roller clutch left metal in the pan.
