Rotating holding fixture plus a bench mount bracket for GM 4L60E, 4L80E, TH350, TH400 and 200R4 cases, used on an engine stand or bolted to the bench.
If you are about to tear down a 4L60E out of a Silverado, Tahoe, S10 or Camaro, or a 4L80E, TH350, TH400 or 200R4 on the same bench, this rotating holding fixture is what keeps the case still while you work. It clamps to the transmission, spins a full 360 degrees, and comes with a bench mount bracket, so you can hang it on a compatible engine stand or bolt it straight to a solid workbench. It weighs about 8 lb and ships with the mounting hardware.
GM's own overhaul procedure for the 4L60-E starts by putting the case in a holding fixture and base (the factory tool is J 8763-02) and keeps it there until the unit is ready to go back in the truck. That is not about convenience. Several of the measurements that decide whether the rebuild lives are taken with the case standing on its bellhousing or lying pan-up, and they assume the case is not rocking. Total end play, specified at 0.005 to 0.036 in. and best set around 0.020 to 0.025 in., is read with a dial indicator on a fixture through the pump bore. Clutch pack travel is checked with feeler gauges at each pack. The valve body is torqued to 8 lb ft in a spiral pattern, and the GM procedure warns that random tightening can distort the bores. All of that goes better on a fixture you can lock at the angle the step calls for than on a case propped on wood blocks.
Start with how you work. If you already own an engine stand, the fixture turns it into a transmission stand, and the rotating head lets you roll the case nose-up to stack the gear train and pan-up to pull the valve body. If you would rather work at bench height, the included bracket bolts to the bench instead. Our 4L60E bench tools guide walks through every measurement on this unit and which tool each one needs, and the 4L60E common problems guide explains the failures you are most likely opening the case to fix, from a burned 3-4 pack to stripped sun shell splines. If you only ever do 4L60E family units and want a simpler lug-mount base, compare the 4L60E holding fixture and bench base.
The listing covers the GM 4L60E, 4L80E, TH350, TH400 and 200R4. That spans most GM rear-wheel-drive automatics a home builder or small shop sees, including 1993-2013 Silverado 1500, Sierra 1500, Tahoe, Yukon, Suburban, S10, Blazer, Camaro and Corvette applications of the 4L60E. Engine stands are not all built the same, so check the fixture's mounting plate against your stand's head pattern, and check the bench bracket against your bench thickness and fastener size before you drill. If you are not sure the fixture will pick up your case, send us the transmission model and we will check. The full 4L60E parts and tools collection lists everything else for the job.
Drain the transmission and pull the converter before you mount it, since a full case is heavier and messier than it needs to be. Bolt the fixture to the case with the supplied hardware, snug it evenly, and make sure the rotation lock is fully engaged before you let go. Mount the stand-side plate or bench bracket on a surface rated for the weight of a dressed case, not a folding table. Work in this order and the fixture earns its keep: pan-up for the valve body and accumulators, nose-up for the pump, end play check and clutch drums, nose-down for the output and rear gear train. On reassembly, spring compressors such as the T-0151 low/reverse spring compressor and the parts in a 4L60E super master rebuild kit go in with the case locked at the same angle you took them out. Refill with Dexron VI once the unit is back in the vehicle.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the GM 4L60E, 4L80E, TH350, TH400 and 200R4. Check the bolt pattern against your exact case before you start, and send us the model if you are unsure.
No. It works on a compatible engine stand, or you can bolt the included bench mount bracket to a sturdy workbench and use it at bench height.
The GM procedure keeps the case in a holding fixture for a reason: end play, clutch travel and valve body torque all assume a stable case. A case that rocks gives bad readings and makes it easy to cross-thread or unevenly torque valve body bolts.
Yes, it rotates 360 degrees and locks, so you can work pan-up for the valve body, nose-up for the pump and drums, and nose-down for the output end.
A dial indicator for end play, an inch-pound torque wrench, clutch spring compressors, Teflon seal installers and sizers, and the rebuild kit itself. Our 4L60E bench tools guide lists each one and why it matters.
