Jeep Cherokee (XJ): Overrunning clutch/low-reverse drum. Front servo piston. Rear servo piston

Jeep Cherokee (XJ) 1984 - 2001 Service Manual > Transmission and transfer case > Automatic transmission-30RH > Disassembly and assembly > Overrunning clutch/low-reverse drum. Front servo piston. Rear servo piston

Overrunning clutch/low-reverse drum

DISASSEMBLY

(1) If the clutch assembly came out with the lowreverse drum, thread two clutch cam bolts into the cam. Then lift the cam out of the drum with the bolts (Fig. 164). Rotate the cam back and forth to ease removal if necessary.

Fig. 164 Removing Overrunning Clutch From Low-Reverse Drum
Fig. 164 Removing Overrunning Clutch From Low-Reverse Drum

1 - CAM BOLTS
2 - LOW-REVERSE DRUM> 3 - OVERRUNNING CLUTCH AND CAM

(2) Remove the clutch roller and spring assembly from the overrunning clutch race.

ASSEMBLY

(1) Assemble clutch rollers and springs in retainer if necessary (Fig. 165).

(2) Install overrunning clutch roller, spring and retainer assembly in clutch cam (Fig. 166).

(3) Temporarily assemble and check overrunning clutch operation as follows: (a) Assemble cam and clutch.

Fig. 165 Overrunning Clutch Rollers, Springs, Retainer
Fig. 165 Overrunning Clutch Rollers, Springs, Retainer

1 - RETAINER
2 - SPRING
3 - ROLLER

Fig. 166 Assembling Overrunning Clutch And Cam
Fig. 166 Assembling Overrunning Clutch And Cam

1 - CLUTCH CAM 2 - CLUTCH ROLL ASSEMBLY

(b) Install clutch assembly on low-reverse drum with twisting motion (Fig. 167).

(c) Install drum-clutch assembly in case and install clutch cam bolts.

(d) Install rear support and support attaching bolts.

(e) Check low-reverse drum rotation. Drum should rotate freely in clockwise direction and lock when turned in counterclockwise direction (as viewed from front of case).

Fig. 167 Temporary Assembly Of Clutch And Drum To Check Operation
Fig. 167 Temporary Assembly Of Clutch And Drum To Check Operation

1 - LOW-REVERSE DRUM
2 - CLUTCH RACE (ON HUB OF DRUM)
3 - OVERRUNNING CLUTCH

Front servo piston

DISASSEMBLY

(1) Remove seal ring from rod guide (Fig. 169).

(2) Remove small snap ring from servo piston rod.

Then remove piston rod, spring and washer from piston.

(3) Remove and discard servo component O-ring and seal rings.

ASSEMBLY

(1) Lubricate new O-ring and seal rings with petroleum jelly and install them on piston, guide and rod.

(2) Install rod in piston. Install spring and washer on rod. Compress spring and install snap ring (Fig.

169).

(3) Set servo components aside for installation during transmission reassembly.

Fig. 168 Assembled Overrunning Clutch
Fig. 168 Assembled Overrunning Clutch

1 - LOW-REVERSE DRUM
2 - OVERRUNNING CLUTCH CAM
3 - ROLLER AND SPRING ASSEMBLY
4 - CLUTCH RACE
5 - HUB OF LOW-REVERSE DRUM

Fig. 169 Front Servo
Fig. 169 Front Servo

1 - PISTON RINGS
2 - O-RING
3 - SNAP-RING
4 - SEAL RING
5 - PISTON ROD GUIDE
6 - SNAP-RING
7 - SERVO SPRING
8 - PISTON ROD
9 - SERVO PISTON

Rear servo piston

DISASSEMBLY

(1) Remove small snap ring and remove plug and spring from servo piston (Fig. 170).

(2) Remove and discard servo piston seal ring.

ASSEMBLY

(1) Lubricate piston and guide seals with petroleum jelly. Lubricate other servo parts with Mopart ATF Plus 3, Type 7176, transmission fluid.

(2) Install new seal ring on servo piston.

(3) Assemble piston, plug, spring and new snap ring.

(4) Lubricate piston seal lip with petroleum jelly.

Fig. 170 Rear Servo Components
Fig. 170 Rear Servo Components

1 - SNAP RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON

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