Removal & Installation
Comanche, Wagoneer and 1984-93 Cherokee
See Figures 1, 2, 3, 4, 5, 6 and 7
The Comanche, Wagoneer and 1984-93 Cherokee models utilize what is referred to as a hydraulic concentric bearing, which performs the same function as a slave cylinder.
The hydraulic concentric bearing incorporates the release bearing and the slave cylinder in a single assembly.
The hydraulic concentric bearing completely encircles the transmission input shaft. In operation, the piston movement causes the bearing to move in a straight line direction.
The hydraulic concentric bearing is serviced as an assembly only. The release bearing portion of the assembly is permanently attached to the piston. The hydraulic lines are also permanently attached.
- Disconnect the negative battery cable.
- Raise and support the vehicle safely.
- Remove the transmission.
- Disconnect the clutch master cylinder fluid line.
- Remove the insulator plate bolts and slide the plate off the bleed line.
- Remove the concentric bearing retaining nut.
- Remove the concentric bearing from the transmission input shaft. If the bearing will be reused, secure the bearing and piston with rubber bands.
- Inspect the bearing mounting pin and replace the front cover if the pin is damaged. Install the concentric bearing on the transmission input shaft.
- Guide the bearing fluid and bleed lines through the openings in the clutch housing.
- Position the bearing boss on the mounting pin and seat the bearing against the transmission. Install a new retaining nut and unhook the T-handle straps retaining the bearing.
- Install the insulator and plate.
- Install the transmission and transfer case and connect the clutch master cylinder fluid line.
- Fill and bleed the clutch hydraulic system.
The clutch master cylinder, reservoir, slave cylinder and connecting lines are sealed units and are serviced as an assembly only. Refer to the Clutch Master Cylinder removal and installation procedure.
On the Grand Cherokee and 1994-98 Cherokee, the clutch master cylinder, reservoir, slave cylinder and connecting lines are sealed units and are serviced as an assembly only. System bleeding is not necessary or possible.
- Fill the reservoir with clean brake fluid.
- Raise and support the truck on jackstands.
- Remove the slave cylinder from the clutch housing, but do not disconnect the hydraulic line. There is enough play in the line to do this.
- Remove the slave cylinder pushrod.
- Using a wood dowel, compress the slave cylinder plunger.
- Attach one end of a rubber hose to the slave cylinder bleeder screw and place the other end in a glass jar, filled halfway with clean brake fluid. Make sure that the hose will stay submerged.
- Loosen the bleeder screw.
- Have an assistant press and hold the clutch pedal to the floor. Tighten the bleeder screw with the pedal at the floor. Bubbles will have appeared in the jar when the pedal was depressed.
- Have your assistant release the pedal, then perform the sequence again, until bubbles no longer appear in the jar.
- Install the slave cylinder and lower the truck. Test the clutch.