Bolts a GM 4L60E case to your bench by its case lugs and swings a full 360 degrees so you can pull the valve body one-handed.
Rebuilding a 4L60E out of a Silverado, Tahoe, Suburban, S10, Blazer or Camaro on a flat bench means fighting a case that rolls every time you lean on a ratchet. This is the bench-mounted holding fixture with its own base, built as the aftermarket equivalent of the Kent-Moore J-8763-B. It grabs the case by its mounting lugs, locks at any angle, and turns a full 360 degrees, so one person can work the whole teardown and assembly without a helper holding the transmission.
GM's 4L60-E overhaul procedure opens with two steps before anything is unbolted: install the holding fixture on the transmission, then install the fixture into the base (GM lists the factory tool as J 8763-02). The rest of the procedure assumes the case is held that way. The very next step after the converter comes out is rotating the unit bellhousing-up so fluid drains out of the case extension. Later the case goes pan-up for the valve body, nose-up for stacking the input housing and gear train, and back again for end play, which GM specifies at 0.005 to 0.036 in. and which Transmission Digest recommends setting nearer 0.020 to 0.025 in. A reading like that is only as good as how still the case sits while the dial indicator is on it.
This fixture hangs the transmission from the case mounting lugs, so it suits GM cases that share that lug pattern. Check your unit against the fitment list below. Then think about where you work: this version bolts to a bench through the included base, which keeps it at a comfortable height and does not tie up an engine stand. Our 4L60E bench tools guide lists every measuring and pressing tool the rebuild calls for and where the fixture fits in that order. If you are still deciding whether to rebuild, our 4L60E common problems guide lays out which failures need the case opened.
The listed applications are GM 180C (3L30), 200, 200C, 200-4R, 250, 250-C, 350, 350-C, 375, 400 (3L80), 425, 475 (3L80-HD), 700-R4, 4L60, 4L60E and 4L80E. That covers the 4L60E in 1993-2013 GM trucks, SUVs and cars, along with the older Turbo-Hydramatic units a lot of shops still see. GM has used more than one revision of this fixture number over the years, so if your case has been machined or your unit is not on the list, check the lug spacing against the fixture before ordering. Shop our full 4L60E collection for the parts the rebuild needs.
Bolt the base to a solid bench near the edge with grade hardware, since a loaded case puts real leverage on it. Pull the torque converter first and have a drain pan under the bellhousing before rotating, because the case extension holds fluid. Hang the case on its lugs, snug both tightening handles, and lock it before you put any torque on a fastener. Use the dual handles to swing it one-handed between positions: pan-up for the valve body and solenoids, nose-down for the pump, nose-up to stack the drums. The fixture makes the clutch work go faster too; pair it with the clutch drum spring compressor and seal installer set for the input housing, and if the 3-4 pack is burned, plan on new 3-4 friction plates. Refill the finished unit with Dexron VI.
| OEM reference | |
| Rotation | |
| Includes | |
| Fitment | |
| Mounting |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is built as the aftermarket equivalent of Kent-Moore J-8763-B. GM's 4L60-E overhaul procedure calls for J 8763-02, a later number for the same style of fixture and base.
No. The base plate is included, and it bolts to your bench. If you would rather use an engine stand, look at a rotating fixture with a stand adapter instead.
Yes, both are on the listed fitment along with the 700-R4, TH350, 200-4R and the other GM units named in the listing. It mounts by the case lugs those units share.
Yes. That is one of the main reasons to use it. Lock the case so it cannot move, then read end play with a dial indicator. GM's specification is 0.005 to 0.036 in.
A clutch spring compressor, seal installers, a dial indicator, snap ring pliers and a torque wrench that reads accurately at low values, plus the rebuild kit and fresh Dexron VI. Our bench tools guide goes through the full list.
