1998 SSANGYONG MUSSO differential

SECTION 3D
REAR DRIVE AXLE
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 3D-1
General Specifications . . . . . . . . . . . . . . . . . . 3D-1
Fastener Tightening Specifications . . . . . . . . . 3D-2
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-3
Noise (During Straight Driving) . . . . . . . . . . . . 3D-3
Oil Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-3
Noise (During Turning) . . . . . . . . . . . . . . . . . . 3D-3
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-3
Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-4Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-4
Component Locator . . . . . . . . . . . . . . . . . . . 3D-5
Maintenance and Repair . . . . . . . . . . . . . . . 3D-6
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 3D-6
Axle Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-6
Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D-9
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . . . 3D-11
Axle Housing . . . . . . . . . . . . . . . . . . . . . . . . . 3D-11
LSD (Limited Slip Diffrential) . . . . . . . . . . . . . 3D-16
SPECIFICATIONS
GENERAL SPECIFICATIONS
Axle Shaft Type
Axle Housing Type
Differential
Reduction Ratio
Type
Gear
M/T
M/T
A/T (MB)
M/T
A/T (BTRA)
M/T
A/T (BTRA)
Description
Semi - floating
Salibury (Build-up)
Conventional Type
Hypoid Gear
4.55
4.55
3.73
4.55
5.38
4.27
4.89Application
661NA
662NA
661LA
662LA

REAR DRIVE AXLE 3D-3
Checks
Worn or Damaged Tooth of Pinion or Side Gear
Worn Pinion Shaft
Excessive Backlash of Pinion Gear and Side Gear
Excessive End-play of Rear Axle Shaft
Incorrect Contact of Side Gear and Differential Case
Axle Housing Crack
Bent or Poor Installation of Drive Pinion Oil Seal
Damaged or Torn Drive Pinion Oil Seal
Loosened Bearing Collar
Worn or Damaged Universal Joint
Worn or Damaged Axle Shaft BearingChecks
Excessive Oil
Faulty Seal of Carrier Contact Surface
Axle Housing Crack
Worn or Damaged Oil SealChecks
Lack of Oil
Low Viscosity of Oil
Insufficient Oil
Excessive Backlash of Ring Gear
Worn or Damaged Tooth of Ring and Pinion Gear
Worn or Damaged Drive Pinion Bearing
Bent Axle Housing
Bent Differential Case
Worn Pinion Shaft
Incorrect Drive Pinion Preload
Incorrect Contact of Ring Gear and Pinion
DIAGNOSIS
NOISE (DURING STRAIGHT DRIVING)
Action
Replenish
Replace
Replace
Adjust
Replace
Replace
Replace
Replace
Replace
Adjust
Retightening
OIL LEAKAGE
Action
Adjust
Repair
Replace
Replace
NOISE (DURING TURNING)
Action
Replace
Replace
Replace
Adjust
Replace
Replace
Replace
Replace
Replace
Replace
Replace
HEATING
Checks
Lack of Oil
Insufficient Backlash of Gears
Excessive Preload of BearingAction
Replenish
Adjust
Adjust

REAR DRIVE AXLE 3D-11
UNIT REPAIR
AXLE HOUSING
Preceding Work : Removal of the axle shaft
Removal of the axle housing
1 Drive Pinion Lock Nut......................240-310 Nm
2 Washer
3 Companion Flange
4 Pinion Oil Seal
5 Bearing Slinger
6 Bearing
7 Shim
8 Shim
9 Bearing Cup
10 Breather Nipple
11 Rear Axle Housing
12 Oil Drain Plug.......................................28-42 Nm
1 3 Shim
14 Bearing
15 Drive Pinion
16 Bearing Cap1 7 Bolt....................................................87-124 Nm
18 Bearing
1 9 Shim
20 Ring Gear
21 Shaft Lock Pin
22 Differential Case
23 Ring Gear Mounting Bolt......................75-90 Nm
24 Thrust Washer
25 Differential Pinion
26 Thrust Washer
27 Side Gear
28 Differential Shaft
29 Housing Cover
3 0 Bolt......................................................38-46 Nm
31 Oil Filler Plug.......................................28-42 Nm

3D-12 REAR DRIVE AXLE
Disassembly Procedure
1. Remove the drain plug and drain the oil. Reinstall the drain
plug.
2. Remove the axle housing cover.
Notice
Clean the cover and housing contact surface.
3. Remove the bearing cap bolts and remove the bearing caps.
Pull out the differential carrier assembly.
Notice
Place alignment marks on the bearing cap not to change
the caps before removal. When pulling out the differential
carrier assembly, be careful not to damage the axle housing.
4. Disassemble the parts of the differential carrier assembly.
Tightening Torque 28 - 42Nm

REAR DRIVE AXLE 3D-13
5. Remove the drive pinion lock nut. Disassemble the parts of
the drive pinion.
Assembly Procedure
1. Clean the all parts and check the followings.
lCheck the ring gear and drive pinion for wear or damage.
If damaged, replace it as set.
lCheck the bearing for sticks, wear, noise or turning
resistance.
lCheck the side gear, pinion, pinion shaft and thrust
washer for wear or damage.
lCheck the differential carrier for crack or wear (bearing
contact surface). Check the gear case for crack.
2. Assemble the parts of the drive pinion.
3. Assemble the parts of the differential carrier.
Tightening Torque of The
Pinion Lock Nut240 - 310 Nm
Tightening Torque of The
Ring Gear Bolts75 - 90 Nm

3D-14 REAR DRIVE AXLE
4. Measure backlash of the side gear and pinion gear.
Specified Value 0 - 0.05 mm
5. Install the differential carrier assembly into the axle housing.
Tightening Torque of The
Bearing Cap Bolts48 - 69 Nm
Notice
Be careful no to change the caps. Be sure to keep the original
position of the caps.
6. Measure backlash of the drive pinion and ring gear.
7. Install the axle housing cover.
Specified Value 0.13 - 0.20 mm
Tightening Torque 39 - 46 Nm

3D-16 REAR DRIVE AXLE
LSD (LIMITED SLIP DIFFERENTIAL)
1 Limited Slip Differential Assembly
2 Shaft, Hub (left)
3 Shim
4 Thrust Washer
5 Face Cam (left)
6 Cam Whillom
7 Thrust Bearing
8 Radial Bearing9 Shaft, Hub (right)
10 Thrust Washer
11 Face Cam (right)
12 Cage
13 Thrust Bearing
14 Plate Spring
15 Radial Bearing
16 Oil Catcher

ANTILOCK BRAKE SYSTEM 4F-7
ABD SYSTEM DESCRIPTION
General:
The Automatic Brake Differential Lock (ABD) is a traction system by means of brake intervention only, available in
a low speed range (< 60kph).
It workes on m-split roads with sidewise different friction coefficients.
The spinning driven wheel is braked and the drive torque can be transferred to the wheel on the high- m side.
During ABD active, the ABD information lamp is blinking.
The temperature of the brakes is calculated by a mathematical model and ABD is switched passive if the calculated
temperature is greater than a threshold value(500°C).
ABD is permitted again, when the calculated temperature is less than 350°C.
Control Algorithm:
The input signals for the control algorithm are the filtered
wheel speed signals from the ABS speed processing.
With the speed difference of the driven wheels, the control
deviation is calculated.
If the control deviation exceeds a certain threshold value,
the wheel with the greater slip is braked actively.
The threshold value depends on the vehicle speed:
It is reduced with increasing vehicle speed down to a constant
value.
Pressure Modulation:
Depending on the control deviation and the wheel acceleration of the spinning wheel, pressure increase, hold and
decrease are made.
The pressure modulation is done with the conventional control with the valves. ASV, USV, EV and AV according
the the following table:
Speed Range:
ABD is available in the speed range £ 60 kph.
Above 60 kph vehicle speed, ABD is passive.
It is possible to initiate ABD operation up to a vehicle speed of 55kph.
Increase
Open Open Open ASVDecrease Hold
Closed Closed Closed
Closed Closed Open
Open Closed Closed USV
EV
AV
Speed difference driven wheels [kph]
18
6
1260ABD operation
Vehicle
speed
[kph]