torque CHEVROLET DYNASTY 1993 Owner's Manual

(3) Swing the bracket into position on the engine and
loosely install the screws through the slotted holes. (4) Push the intermediate shaft assembly into the
transaxle as far as it can travel. Hold the assembly in
this position and tighten the screws (bracket to engine
block) to 54 N Im (40 ft. lbs.) torque. This will ensure
full seal engagement between the journal on the
intermediate shaft and the seal in the transaxle
extension. (5) Distribute a liberal amount of grease in side
spline and pilot bore on bearing end of intermediate
shaft. Use MOPAR Multi-Purpose Lubricant, or
equivalent. (6) Install speedometer pinion (Fig. 9).
(7) Install right driveshaft. See Driveshaft Assem-
blies Install.
C/V JOINT BOOTS Handling and Cleaning
It is vitally important during anyservice procedures
requiring boot handling. That care be taken not to
puncture or tear the boot by over tightening clamps,
misuse of tool(s) or pinching the boot. Pinching can
occur by rotating the C/V joints (especially the tripod)
beyond normal working angles.
The driveshaft boots are not compatible with oil, gaso-
line, or cleaning solvents. Care must be taken that boots
never come in contact with any of these liquids. The only
acceptable cleaning agent for driveshaft boots is
soap and water. After washing, boot must be thor-
oughly rinsed and dried before reusing.
BOOTS INSPECT
Noticeable amounts of grease on areas adjacent to or
on the exterior of the C/V joint boot. Is the first
indication that a boot is punctured, torn or that a
clamp has loosened. When a C/V joint is removed for
servicing of the joint. The boot should be properly
cleaned and inspected for cracks, tears and scuffed
areas on interior surfaces. If any of these conditions
exist, boot replacement is recommended.
BOOTS INSTALL
THE HARD PLASTIC BOOTS REQUIRE APPROXI-
MATELY 100TIMES THE CLAMPING FORCE OF THE
RUBBER BOOT. THE CLAMPS USED ON THE RUB-
BER BOOTS DO NOT HAVE THE TYPE OF LOAD
CAPACITY REQUIRED. TO SEAL THE HARD PLASTIC
BOOTS AND SHOULD NOT BE USED FOR THIS PUR-
POSE.
Rubber boots appear only on the inner joints of
certain driveshafts.
Fig. 9 Install Speedometer PinionFig. 1 C/V Joint Boot Positioning G.K.N.
Fig. 8 Installing Intermediate Shaft Assembly
2 - 44 SUSPENSION AND DRIVESHAFTS Ä

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 re-
sistance 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 fasten-
ers, remove shock absorbers (Fig. 2).
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 perfor-
mance.
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 N Im (45 ft. lbs.)
torque. Connect air line, if so equipped. (3) Install wheel and tire assembly, tighten wheel
stud nuts to 129 N Im (95 ft. lbs.) torque. Lower vehi-
cle to ground. (4) With suspension supporting the weight of the
vehicle. Tighten lower shock absorber fastener to 54
N Im (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.
INSTALLATION
(1) Position cup to rail. Install and tighten attach-
ing bolts to 8 N Im (70 in. lbs.) torque.
(2) Install isolator over jounce bumper and install
spring. (3) Raise axle and loosely assemble both shock ab-
sorber 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 N Im (45 ft. lbs.) torque.
Fig. 2 Remove/Install Shock Absorber Fasteners
Fig. 3 Coil Spring & Jounce Bumper
Ä SUSPENSION AND DRIVESHAFTS 2 - 51

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 re-
move 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 N Im (40 ft. lbs.) torque.
(2) Fit diagonal brace into support bracket and
over underbody stud, tighten stud nut to 75 N Im (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 N Im (70 ft. lbs.) torque. Tighten nut on
track bar-to-frame bolt to 75 N Im (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. 4 Track Bar Brace Bracket
Fig. 5 Remove Brake Hose Mounting Bracket Screw and Park Brake Cable
2 - 52 SUSPENSION AND DRIVESHAFTS Ä

WARNING: WHEN REMOVING THE REAR AXLE
PIVOT BUSHING ON VEHICLES EQUIPPED WITH EI-
THER 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).
(4) Remove hanger bracket to frame rail bolts (Fig.
7).
(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 AS- SEMBLY
Remove bushing with Remover/Installer Spe-
cial Tool C-4212-L (Press) and 3 piece set, Spe- 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 support-
ing 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).
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 assem-
bly 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 N Im (55 ft. lbs.) torque (Fig.
12). Install lower shock absorber mounting bolt, but
do not tighten. (5) Position brake hose mounting bracket to trailing
arm, install and tighten retaining screw to 11 N Im (95
in. lbs.) torque (Fig. 13). (6) Attach park brake cable housing to hanger
bracket and cable to connector.
Fig. 8 Tools Installed To Remove Bushing
Fig. 6 Remove Pivot Bushing Hanger Bracket Bolts
Fig. 7 Remove Hanger Bracket
Ä SUSPENSION AND DRIVESHAFTS 2 - 53

(7) Lower vehicle with suspension supporting vehi-
cle weight, trailing arm at design height. Tighten
pivot bolt nut and lower shock absorber mounting
bolt to 61 N Im (45 ft. lbs.) torque.
Fig. 9 Proper Position of Pivot Bushing
Fig. 10 Tools Assembled for Bushing Installation
Fig. 11 Install Hanger Bracket to Pivot Bushing
Fig. 12 Install Hanger Bracket on Frame
Fig. 13 Brake Hose Bracket & Park Brake Cable
2 - 54 SUSPENSION AND DRIVESHAFTS Ä

Tool C-4366-1 into press base. Position assembly as
shown in (Fig. 6) and press bushing into arm to
depth shown in (Fig. 5).
(3) Position hanger bracket on pivot bushing, and
install through bolt, loose assemble nut (Fig. 7). 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 N Im (55 ft. lbs.) torque (Fig.
8). Install lower shock absorber mounting bolt, but do
not tighten. (5) Position brake hose mounting bracket to trailing
arm, install and tighten retaining screw to 11 N Im (95
in. lbs.) torque (Fig. 9). (6) Attach park brake cable housing to hanger
bracket and cable to connector. (7) Lower vehicle with suspension supporting vehi-
cle weight, trailing arm at design height. Tighten
pivot bolt nut and lower shock absorber mounting
bolt to 61 N Im (45 ft. lbs.) torque.
Fig. 7 Install Hanger Bracket to Pivot Bushing
Fig. 8 Install Hanger Bracket on Frame
Fig. 9 Brake Hose Bracket & Park Brake Cable
Fig. 5 Proper Position of Pivot Bushing
Fig. 6 Tools Assembled for Bushing Installation
2 - 56 SUSPENSION AND DRIVESHAFTS Ä

REAR AXLE ASSEMBLY
REMOVE
(1) Raise vehicle (see Hoisting, Group 0). Support
axle with jack stands and remove wheel and tire as-
sembly. (2) Separate park brake cable at connector. Detach
cable housing from hanger bracket (Fig. 1).
(3) Remove lock and separate brake tube assembly
from brake hose mounting bracket (Fig. 1). (4) Remove lower shock absorber through bolts and
track bar to axle pivot bolt. Support track bar end
with wire (Fig. 2).
(5) Lower axle until spring and isolator assemblies
can be removed. Remove spring and isolator assem-
blies (Fig. 3). (6) Support pivot bushing end of the trailing arms.
(as well as axle beam with jack stands) Remove pivot
bushing hanger bracket to frame screws. Lower and
remove axle assembly from vehicle. (7) Remove rear brake assemblies, see Group 5 for
proper procedure. (8) For pivot bushing removal and installation see
PIVOT BUSHING this group.
INSTALLATION
(1) Raise and support axle on jack stands.
(2) Attach pivot bushing hanger brackets to frame
rail (Fig. 4). Tighten screws to 61 N Im (45 ft. lbs.)
torque.
(3) Install springs and isolators (Fig. 5).
(4) Raise axle and install shock absorber and track
bar through bolts loose assemble only (Fig. 6).
(5) Install brake assembly as follows:
DRUM BRAKE ASSEMBLY
(1) Position spindle, seal, and brake support to
axle after routing park brake cable through trailing
arm opening and brake tube over arm (Figs. 1). In-
stall the 4 spindle mounting bolts finger tight. Then
torque the 4 spindle mounting bolts to 75 N Im (55 ft.
lbs.) torque. (2) Install brake drum and bearings.Fig. 1 Remove Brake Hose Mounting Bracket Screw and Park Brake Cable
Fig. 2 Remove Shock Absorber and Track Bar Bolts
Fig. 3 Remove/Install Coil Spring and Isolator Assembly
Fig. 4 Attach Hanger Brackets to Frame
Ä SUSPENSION AND DRIVESHAFTS 2 - 57

(3) Install washer and nut. Tighten nut to 27-34
N Im (240-300 in. lbs.) torque while rotating brake
drum. Then back off nut to completely release pre-
load. Finger tighten nut. (4) Position nut lock with one pair of slots in-line
with cotter pin hole. Install cotter pin. Clean and in-
stall grease cap. DISC BRAKE ASSEMBLY
(1) Position caliper support and spindle to axle. In-
stall the 4 spindle mounting bolts finger tight. Then
torque the 4 spindle mounting bolts to 75 N Im (55 ft.
lbs.) torque. (2) Install hub and bearings. (3) Install washer and nut. Tighten to 27-34 N
Im
(240-300 in. lbs.) torque while rotating hub. Then
back off nut to completely release preload. Finger
tighten nut. (4) Position nut lock with one pair of slots in-line
with cotter pin hole. Install cotter pin. Clean and in-
stall grease cap. (5) Install braking disc and adapter. Install caliper
assembly (see Rear Disc Brake) in Brakes Section,
Group 5. (6) Attach brake hose and parking brake cable to
caliper and suspension arm (Fig. 7). Install brake
hose mounting bracket to caliper support. (7) Route park brake cable through hanger bracket
and lock housing end into bracket. Install cable end
into (intermediate) connector (Fig. 7). (8) Install brake hose and fitting into bracket and
install lock. Attach brake tube assembly to hose fit-
ting and tighten to 16 N Im (140 in. lbs.) torque (Fig.
7). (9) Install wheel and tire assemblies and tighten
wheel stud nuts to 129 N Im (95 ft. lbs.) torque. Re-
move jacks and lower vehicle. (10) With suspension supporting vehicle, torque
lower shock absorber bolts to 61 N Im (45 ft. lbs.).
Then torque track bar bolt to 95 N Im (70 ft. lbs.).
(11) Bleed brake system. See BRAKES, Group 5.
Fig. 5 Install Springs and Isolators
Fig. 6 Install Shock Absorber and Track Bar Fasteners (Bolts)
Fig. 7 Reconnect Brake Tube and Park Brake Cable
2 - 58 SUSPENSION AND DRIVESHAFTS Ä

² Air pressure leaks down below 621 kPa (90 psi),
before it remains steady.
² Output pressure builds up to less than 758 kPa
(110 psi) when it stabilizes. If the compressor is allowed to run during this test
until it reaches its maximum output pressure of 1516
kPa (220 psi). The solenoid exhaust valve will act as a pressure relief valve. The resulting leak-down, af-
ter the compressor is shut off, will indicate a false
leak.
SERVICE PROCEDURES
COMPRESSOR ASSEMBLY
REMOVAL
(1) Disconnect negative battery cable.
(2) Raise vehicle, see Hoisting, Group 0.
(3) Remove cover from compressor assembly. Re-
move air hose and electrical connectors (Figs. 1 and
2). (4) Remove compressor assembly mounting bolts
and lower assembly from vehicle. (5) Remove mounting bracket bolts and slide
mounting bracket away from compressor.
INSTALLATION (1) Slide mounting bracket on compressor and in-
stall bolts and tighten to 8 N Im (70 in. lbs.) torque.
(2) Install compressor assembly to frame rail and
tighten bolts to 8 N Im (70 in. lbs.) torque.
(3) Connect air hose and electrical connector to
compressor assembly. (4) Install cover on compressor assembly and
tighten bolts to 8 N Im (70 in. lbs.) torque.
(5) Lower vehicle and connect negative battery ca-
ble. (6) Check operation of the system.
Fig. 6 Compressor Current Draw Test
2 - 62 SUSPENSION AND DRIVESHAFTS Ä

SERVICE PROCEDURES
CONTROL MODULE (ASCM)
REMOVAL (1) Disconnect negative battery cable.
(2) Remove right side trunk trim panel.
(3) Remove electrical connectors from control mod-
ule and relay (Fig. 11). (4) Remove control module mounting screws and
remove assembly.
INSTALLATION
(1) Install relay on the control module mounting
bracket (if required). (2) Place control module in mounting position.
(3) Install mounting screws and tighten to 2-3 N Im
(19-29 in. lbs.) torque. (4) Install control module and relay wiring connec-
tors (Fig. 11). (5) Install right side trunk trim panel.
(6) Connect negative battery cable.
COMPRESSOR RELAY
REMOVAL
(1) Remove right side trunk trim panel.
(2) Remove electrical connector from relay.
(3) Remove relay from control module mounting
bracket by prying out on locating clip (Fig. 11)
INSTALLATION (1) Push relay onto bracket (relay will Lock into
position.) (2) Install electrical connector. (3) Install trim panel.
COMPRESSOR ASSEMBLY
REMOVAL
(1) Disconnect battery negative cable.
(2) Raise vehicle, see Hoisting, Group 0.
(3) Remove cover from compressor assembly. Re-
move air hose (see AIR LINES) and electrical connec-
tors (Fig. 12) (4) Remove compressor assembly mounting screws
and lower assembly from vehicle. (5) Remove mounting bracket screws and slide
mounting bracket away from compressor.
INSTALLATION (1) Slide mounting bracket on compressor and in-
stall screws and tighten to 8 N Im (70 in. lbs.) torque.
DO NOT OVER TORQUE THESE SCREWS. (2) Install compressor assembly to frame rail and
tighten screws to 8 N Im (70 in. lbs.) torque. DO NOT
OVER TORQUE THESE SCREWS. (3) Connect air hose and electrical connector to com-
pressor assembly. (4) Install cover on compressor assembly and tighten
screws to 6 N Im (40 in. lbs.) torque.
(5) Lower vehicle and connect battery negative
cable. (6) Check operation of the system.
AIR DRYER
REMOVAL
Remove compressor assembly. See COMPRESSOR
ASSEMBLY.
Fig. 11 Control Module and Relay Wiring
Fig. 12 Compressor Assembly
Ä SUSPENSION AND DRIVESHAFTS 2 - 85