Compresses the low and reverse rear clutch return spring on GM units so you can pull or seat the retaining ring safely instead of fighting a loaded spring.
The low and reverse clutch at the back of a GM automatic sits under a stacked return spring held down by a retaining ring, and getting that ring in or out means holding the spring compressed while you work. Do it with a screwdriver and a prayer and you have a spring pack under real load looking for a way to launch across the bench. This is the dedicated tool that does the rear clutch the safe way.
You set the compressor over the piston, bear down evenly on the spring retainer, and the ring groove comes clear so you can pull or seat the snap ring cleanly. Back it off slow and the spring releases without drama. It is shaped specifically for the rear low and reverse clutch pack, so it reaches where a general drum compressor cannot, and it makes teardown and reassembly of that section a two-minute job instead of a knuckle-busting fight.
Fits the whole GM rear-drive family that shares this clutch layout: the 250, 250C, 350, 350C, 700-R4, 4L60, 4L60E, 4L65E, 4L70, 4L70E, and 4T80-E. It is machined from steel with a black oxide finish so it shrugs off shop humidity and holds up job after job. If you rebuild GM transmissions, this is one of those buy-once tools that earns a permanent spot on the bench.
| Type | Low and reverse rear clutch spring compressor |
| Fits | GM 250, 250C, 350, 350C, 700-R4, 4L60, 4L60E, 4L65E, 4L70, 4L70E, 4T80-E |
| Function | Compresses rear clutch return spring for safe ring removal |
| Material | Steel with black oxide finish |
| Replaces | Atec Trans-Tool T-0151 pattern |
