Jeep Cherokee

 Service Manual

Transmission and transfer case » AW-4 automatic transmission » Disassembly and assembly
Second brake

DISASSEMBLY

(1) Remove second brake drum from output shaft (Fig. 280).

Fig. 280 Removing/Installing Second Brake Assembly

1 - SECOND BRAKE ASSEMBLY
2 - OUTPUT SHAFT

(2) Remove thrust washer from second brake drum (Fig. 281).

(3) Compress piston return springs with shop press and tool 7538. Then remove piston snap ring (Fig. 282).

(4) Remove compressor tool and remove spring retainer and return springs.

(5) Remove second brake piston and sleeve from drum with compressed air (Fig. 283). Use only enough air pressure to ease piston out of drum.

(6) Remove and discard brake piston O-rings.

(7) Measure free length of piston return springs with springs mounted in retainer (Fig. 284). Length should be approximately 16.05 mm (0.632 in.).

Replace return springs if length is less than specified.

Fig. 281 Removing/Installing Second Brake Drum Thrust Washer

1 - THRUST WASHER
2 - SECOND BRAKE DRUM

Fig. 282 Removing/Installing Second Brake Piston Snap Ring

1 - COMPRESSOR TOOL
2 - PISTON SNAP RING

Fig. 283 Removing/Installing Piston And Sleeve

1 - PISTON AND SLEEVE
2 - DRUM

Fig. 284 Measuring Second Brake Piston Return Springs

1 - PISTON RETURN SPRINGS
2 - SPRING RETAINER

ASSEMBLY

(1) Lubricate and install new O-rings on brake piston. Then install brake piston in drum.

(2) Install return springs and retainer on brake piston.

(3) Compress return springs with shop press and Compressor Tool 7538. Install piston snap ring and remove brake assembly from press.

(4) Check brake piston operation with low pressure compressed air (Fig. 285). Apply air pressure through feed hole in drum. Piston should move smoothly when applying-releasing air pressure.

Fig. 285 Checking Second Brake Piston Operation

1 - PISTON
2 - DRUM

(5) Coat thrust washer with petroleum jelly and install it in drum. Be sure washer notches are aligned with tabs on spring retainer (Fig. 286)

Fig. 286 Installing Second Brake Thrust Washer

1 - THRUST WASHER NOTCHES
2 - SPRING RETAINER TABS

Transmission

Oil pump

Overdrive planetary gear and clutch

Overdrive support

Direct clutch

Forward clutch

Front planetary gear

Sun gear and no. 1 one-way clutch

Second brake

Planetary/brake pack/output shaft

Transmission valve body