Four-tool set that compresses 4L60E clutch drum and low/reverse return springs and resizes turbine and stator shaft Teflon seals on the bench.
Most 4L60E rebuilds out of a Silverado, Sierra, Tahoe, Yukon, S10 or Camaro do not go wrong at the clutches. They go wrong at the return springs and the Teflon rings. A spring retainer that cocks under a screwdriver, or a sealing ring that gets rolled over the turbine shaft by hand, can leave a brand new rebuild slipping before it ever leaves the driveway. This set puts the four tools for those jobs on the bench together: a T-0158 universal clutch drum spring compressor, a T-0151 rear clutch spring compressor, a J-36418-C turbine shaft seal installer and resizer, and an ST-1503 stator shaft seal installer and resizer. The listing covers the GM 700-R4, 4L60, 4L60E, 4L65E, 4L70E and 4L70L.
Every clutch in this transmission is applied by a piston held back by a return spring and a retainer under a snap ring. The T-0158 sits over a drum up to 6 inches across and pushes the retainer down so the snap ring can be lifted out and reinstalled without the spring launching it. It handles the forward, 3-4 and reverse input drums. The 3-4 piston deserves care: Sonnax notes the load release springs in that pack must never be left out, and you only see them properly when the pack is compressed evenly. The T-0151 is the tool for the low/reverse piston at the rear of the case. It hooks the case lugs and squeezes that spring pack so the ring clears; the listing states it also fits GM 250, 350, 4L70 and 4T80-E cases.
The seal tools solve a quieter problem. The turbine shaft and the stator shaft on the pump both carry scarf-cut Teflon rings that feed the clutches in the input housing. Each ring has to stretch over the shaft into its groove and then be squeezed back to size before the housing or pump slides on. The installer cone spreads the ring evenly, and the resizer sleeve closes it again in one push.
The tools help you rebuild right, but it pays to know what you are fixing. Repeat 3-4 burnup is usually a pressure or leak problem in the 3rd-gear circuit rather than the clutches themselves, so read our 3-4 clutch friction count and upgrade guide before you choose a pack. If the truck has no Reverse or slips in manual low, our low-reverse clutch guide explains what to inspect once the T-0151 has the rear spring pack out.
The compressors and sizers are listed for the GM 700-R4, 4L60, 4L60E, 4L65E, 4L70E and 4L70L, which covers 1982 700-R4 units through the last 4L70E trucks. They are listed as replacements for the Kent-Moore J-36418-C and Atec T-0158-HD, T-1574, T-1503 and #39SS. If you are building a 4L65E or 4L70E, the 3-4 pack is larger and clearances differ, so follow the specs for your unit. Hard parts for every year are on our 4L60E parts page.
| Fits | GM 700-R4, 4L60, 4L60E, 4L65E, 4L70E, 4L70L |
| Pieces | 4 (T-0158, T-0151, J-36418-C, ST-1503) |
| Drum capacity | Clutch drums up to 6 in. |
| Material | Carbon steel and aluminum alloy |
| Replaces | Kent-Moore J-36418-C, Atec T-0158-HD, T-1574, T-1503, #39SS |
| Rear compressor also fits | GM 250, 250C, 350, 350C, 4L70, 4L70E, 4T80-E |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the forward, 3-4 and reverse input drums and fits clutch drums up to 6 inches in diameter, which covers the input housing and reverse input housing in the 700-R4 through 4L70E family.
The low/reverse piston sits in the back of the case under a stiff return spring pack and snap ring. The T-0151 engages the case lugs and compresses that pack evenly so the ring can come out without bending the retainer.
It is possible, but a hand-rolled ring often tears or stays oversize, and then the housing will not slide on or the circuit leaks. The installer cones spread the ring evenly and the resizers bring it back to size in one step.
Yes, the listing covers the 700-R4, 4L60, 4L60E, 4L65E, 4L70E and 4L70L. Use the clutch counts and clearance specs for your specific unit.
A master rebuild kit with seals, frictions, steels and band, a front pump alignment band and puller, and a new filter. Replace any drum that is cracked or has a worn bushing.
