Файл: 92FWD_2.pdf

2 - 52 SUSPENSION/DRIVESHAFTS

to the road surface. While being able to twist as one wheel moves vertically with respect to the other.

Roll resistance is provided partly by the axle's resistance to twist. But primarily by a torque tube or rod (depending on the suspension option called for) running through the channel and attached rigidly to its end plates by welding. Because the torque tube/rod is an integral part of the axle assembly, it cannot be individually replaced.

The spindles are bolted to the axle end (spindle mounting) plates and can be individually replaced if required. Rear wheel alignment changes require the use of shims between the spindle and axle end plates.

SHOCK ABSORBERS

REMOVAL

(1)Raise vehicle, see Hoisting, Group 0.

(2)Support axle and remove wheel and tire assem-

bly.

(3)If equipped with air shocks, disconnect air lines.

(4)Remove upper and lower shock absorber fasteners, remove shock absorbers (Fig. 2).

Fig. 2 Remove/Install Shock Absorber Fasteners

INSPECTION

Inspect for evidence of fluid leakage from upper end of reservoir. (Actual leakage will be a stream of fluid running down and leaking off lower end). Slight seepage is not unusual and will not effect performance.

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INSTALLATION

(1)Position shock absorber on car. Install upper and lower fasteners loosely to hold shock absorber in place.

(2)Tighten upper fastener to 61 NIm (45 ft. lbs.) torque. Connect air line, if so equipped.

(3)Install wheel and tire assembly, tighten wheel stud nuts to 129 NIm (95 ft. lbs.) torque. Lower vehicle to ground.

(4)With suspension supporting the weight of the

vehicle. Tighten lower shock absorber fastener to 54 NIm (40 ft. lbs.) torque.

COIL SPRINGS AND JOUNCE BUMPER

REMOVAL

(1)Lift vehicle see hoisting Group 0.

(2)Support axle assembly and remove both lower shock absorber attaching bolts.

(3)Lower axle assembly until spring and spring upper isolator can be removed (Fig. 3). Do not stretch brake hose.

(4)Remove two screws holding cup to rail (Fig. 1). Remove assembly.

Fig. 3 Coil Spring & Jounce Bumper

INSTALLATION

(1)Position cup to rail. Install and tighten attaching bolts to 8 NIm (70 in. lbs.) torque.

(2)Install isolator over jounce bumper and install spring.

(3)Raise axle and loosely assemble both shock absorber to axle mounting bolts. Remove axle support and lower vehicle.

(4)With suspension supporting the weight of the

vehicle. Tighten both shock absorber attaching bolts to 61 NIm (45 ft. lbs.) torque.

TRACK BAR-BRACE-BRACKET (FIG. 4)

REMOVAL

(1)Raise vehicle, see Hoisting, Group 0.

(2)Raise rear axle to curb height, with jack stands (Fig. 5).

(3)Remove track bar-to-axle pivot bolt. And remove track bar-to-frame pivot bolt. Remove track bar.

(4)Remove diagonal brace-to-underbody stud nut. Remove diagonal brace.

(5)Remove two track bar bracket-to-frame rail bolts. Remove bracket.

INSTALLATION

(1)Position support bracket on frame rail, install and tighten (2) bolts to 54 NIm (40 ft. lbs.) torque.

(2)Fit diagonal brace into support bracket and over underbody stud, tighten stud nut to 75 NIm (55 ft. lbs.) torque.

(3)Fit track bar to diagonal brace, loose assemble pivot bolt with nut and washer on rear side. Attach

the other end of track bar to bracket on axle and tighten to 95 NIm (70 ft. lbs.) torque. Tighten nut on track bar-to-frame bolt to 75 NIm (55 ft. lbs.) torque.

PIVOT BUSHING AC AND AY BODY

REMOVE FROM VEHICLE

(1)Raise vehicle (see Hoisting, Group 0). Remove brake hose mounting bracket screw (Fig. 5).

(2)Detach park brake cable at connector and from hanger bracket (Fig. 5).

Fig. 5 Remove Brake Hose Mounting Bracket Screw

and Park Brake Cable

2 - 54 SUSPENSION/DRIVESHAFTS

WARNING: WHEN REMOVING THE REAR AXLE PIVOT BUSHING ON VEHICLES EQUIPPED WITH EITHER REAR COIL SPRINGS OR AIR SUSPENSION. THE REAR AXLE MUST BE SUPPORTED BY THE AXLE AND TRAILING ARM TO ENSURE ADEQUATE SUPPORT OF REAR AXLE.

(3) Support the rear axle assembly at both the axle channel and the trailing arm (Fig. 6). Then remove lower shock absorber to rear axle mounting bolt (Fig. 6).

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cial Tool 6122 (Receiver Support Bridge, Bushing Remover/Installer and Bushing Remover).

(1)Install receiver (support) bridge into base of press C-4212-L and bushing Remover/Installer disc onto screw.

(2)Position assembly with receiver bridge supporting trailing arm while turning screw to begin bushing removal.

(3)After bushing has begun to move replace bushing remover/installer (round disc) with bushing remover (oval shaped disc). Use this assembly to finish pressing bushing out of trailing arm (Fig. 8).

Fig. 6 Remove Pivot Bushing Hanger Bracket Bolts

(4) Remove hanger bracket to frame rail bolts (Fig.

7).

Fig. 7 Remove Hanger Bracket

(5) Lower axle assembly down enough to remove pivot bolt and hanger bracket (Fig. 7). Right side trailing arm shown.

PIVOT BUSHING REMOVAL FROM AXLE ASSEMBLY

Remove bushing with Remover/Installer Special Tool C-4212-L (Press) and 3 piece set, Spe-

Fig. 8 Tools Installed To Remove Bushing

PIVOT BUSHING INSTALLATION

(1)Align the bushing with the bushing mounting hole in the trailing arm bracket (Fig. 9). Tap bushing in slightly to hold position.

(2)Assemble bushing installer Tool onto press screw and support bridge into press base. Position assembly as shown in (Fig. 10) and press bushing into arm to depth shown in (Fig. 9).

(3)Position hanger bracket on pivot bushing, and install through bolt, loose assemble nut (Fig. 11). Right side trailing arm shown.

(4)Position hanger to frame rail (a suitable drift

will aid in guiding hanger bracket into position). Install and tighten screws to 75 NIm (55 ft. lbs.) torque (Fig. 12). Install lower shock absorber mounting bolt, but do not tighten.

(5)Position brake hose mounting bracket to trail-

ing arm, install and tighten retaining screw to 11 NIm (95 in. lbs.) torque (Fig. 13).

(6)Attach park brake cable housing to hanger bracket and cable to connector.

2 - 56 SUSPENSION/DRIVESHAFTS

PIVOT BUSHING AC AG AJ AP BODY

REMOVE FROM VEHICLE

(1)Raise vehicle (see Hoisting, Group 0). Remove brake hose mounting bracket screw (Fig. 1).

(2)Detach park brake cable at connector and from hanger bracket (Fig. 1).

Fig. 1 Remove Brake Hose Mounting Bracket Screw

and Park Brake Cable

WARNING: WHEN REMOVING THE REAR AXLE PIVOT BUSHING ON VEHICLES EQUIPPED WITH EITHER REAR COIL SPRINGS OR AIR SUSPENSION. THE REAR AXLE MUST BE SUPPORTED BY THE AXLE AND TRAILING ARM TO ENSURE ADEQUATE SUPPORT OF REAR AXLE.

(3) Support the rear axle assembly at both the axle channel and the trailing arm with jack stands (Fig. 2). Then remove lower shock absorber to rear axle mounting bolt (Fig. 2).

Fig. 2 Remove Pivot Bushing Hanger Bracket Bolts

(4)Remove hanger bracket to frame rail bolts (Fig.

3).

(5)Lower axle assembly down enough to remove pivot bolt and hanger bracket (Fig. 3). Right side trailing arm shown.

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Fig. 3 Remove Hanger Bracket

PIVOT BUSHING REMOVAL FROM AXLE ASSEMBLY

Remove bushing with Remover/Installer Special Tool C-4702-7 Press. And 3 piece set, Special Tool C-4212 and C-4366-1 (Receiver Support Bridge, Bushing Remover/Installer and Bushing Remover).

(1)Install receiver (support) cup C-4366-1 into base of press C-4212 and Bushing Remover Cup C-4702-7 onto screw.

(2)Position assembly with receiver bridge supporting trailing arm while turning screw to begin bushing removal.

(3)After bushing has begun to move replace bushing remover/installer (round disc) with bushing remover (oval shaped disc). Use this assembly to finish pressing bushing out of trailing arm (Fig. 4).

Fig. 4 Tools Installed To Remove Bushing