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Section C
Suspension
ATTENTION
HSV vehicles are equipped with a Supplemental Restraint System (SRS). An SRS consists of seat belt pre-
tensioners (fitted to all front seats), and a driver’s-side air bag AND a passenger’s-side air bag and left and
right hand side air bags. Refer to CAUTIONS, Section 12M, of the Holden WL Service Information before
performing any service operation on or around SRS components, the steering mechanism or wiring. Failure
to follow the CAUTIONS could result in personal injury or unnecessary SRS system repairs.
1 Purpose...................................................................................................................................................2
2 Front Suspension...................................................................................................................................3
2.1 General Information............................................................................................................................................... 3
2.2 Front Suspension Components............................................................................................................................ 4
Luxury Suspension................................................................................................................................................ 4
2.3 Service Operations ................................................................................................................................................ 5
Front Wheel Alignment.......................................................................................................................................... 5
2.4 Service Intervals..................................................................................................................................................... 6
3 Independent Rear Suspension .............................................................................................................7
3.1 General Information............................................................................................................................................... 7
3.2 Rear Suspension Components............................................................................................................................. 8
Luxury Suspension................................................................................................................................................ 8
3.3 Service Information ............................................................................................................................................... 9
Service Information For Multi Link IRS................................................................................................................ 9
Rear Wheel Alignment........................................................................................................................................... 9
4 Rear Axle...............................................................................................................................................10
4.1 General Information............................................................................................................................................. 10
4.2 Service Operations .............................................................................................................................................. 11
Torque Check....................................................................................................................................................... 11
4.3 Limited Slip Differential....................................................................................................................................... 12
Precautions .......................................................................................................................................................... 12
5 Propeller Shaft And Universal Joints.................................................................................................13
5.1 General ................................................................................................................................................................. 13
5.2 Service Operations .............................................................................................................................................. 14
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1 Purpose
The purpose of this section is to provide information on the front and rear suspension assemblies fitted to HSV WL
models. The information is designed to supplement the information contained in the Holden WL Service Information, and
details are given where differences occur between the HSV models and standard Holden models. A series of instruction
drawings describe the design changes and indicate specific part numbers, fitting instructions and relevant notes for
vehicle servicing.
NOTE
If specific technical data on a HSV model is not
contained in this supplement, obtain data for that
model from the relevant Holden WL Service
Information Supplement. References are made
throughout this section to Holden Service
Information, to assist in providing information for
specific service operations.
When hoisting (or jacking) HSV models,
ensure that the liftin g head of the hoist lifts on
the chassis before the arm of the hoist
contacts the side-skirt
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2 Front Suspension
2.1 General Information
The front suspension assembly fitted to HSV WL model is based on the Holden ‘MacPherson Strut’ design. All HSV WL
Grange struts have Monroe Sensatrac. This basic assembly (front and rear) is then modified by HSV to provide a
suspension system more suited to the requirements of the HSV vehicle.
HSV SUSPENSION SYSTEMS
MODEL: SPORT PERFORMANCE LUXURY PRESTIGE
WL Grange N/A N/A S N/A
Table-1
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2.2 Front Suspension Components
The following components are fitted to front suspension assemblies as indicated:
Luxury Suspension
03C-970301 Spring - Front Suspension
03F-031601 Strut Asm Frt - LH
03F-031602 Strut Asm Frt - RH
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2.3 Service Operations
Service front suspension assemblies fitted to HSV models in accordance with the relevant Holden WL Service
Information. Additional service requirements for specific HSV suspension assemblies are detailed in succeeding
paragraphs.
Safety and Cautionary note for vehicles
equipped with ABS Whenever any component
that forms a part of the ABS is disturbed, it is
vital that the complete ABS system is
checked. Refer to Section 5B
ABS/TCS/ESP General Information of the
Holden WL Service Information.
The tyre life of high performance low-profile tyres fitted to HSV WL vehicles is very sensitive to the toe-in setting of the
front suspension. It is crucial therefore, that care is taken to set the toe-in accurately to the correct specification.
Front Wheel Alignment
The front wheel alignment specification for WL vehicles is:
Toe-In
Degrees Total 0°10' ± 0°10'
Degrees Per Wheel 0°05' ± 0°5'
Camber & Caster
Camber -0°30' ± 0°10'
Caster 7°45' ± 1°15'
The toe-in specification is deliberately quoted as an angle because wherever possible toe-in should be measured in
degrees.
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3 Independent Rear Suspension
3.1 General Information
Rear suspension assemblies fitted to HSV models are detailed in the Front Suspension, these assemblies have been
developed to satisfy the various applications of the range of HSV models described in that paragraph. The level ride
system is fitted so that the vehicle “self levels” depending on load. The system contains rear air shockers, air pump and a
height detection sensor
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3.2 Rear Suspension Components
The following components are fitted to rear suspension:
Luxury Suspension
04B-031301 Spring Rear Suspension
04E-031601 Shock Absorber – Rear Suspension
04F-970301 Bar – Rear Stabiliser (16 mm)
04E-970809 Link Height Sensor (Sed 70mm)
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3.3 Service Information
Service Information For Multi Link IRS
For all service information relating to WL Grange rear suspension refer to Holden WL Statesman Service Information
Section 4A1 Rear Suspension
Rear Wheel Alignment
Rear suspension geometry should be set within the limits specified:
Toe-In
Toe Degrees per wheel 0o00’ to 0o15’
Variation side-to-side 0o10’ maximum.
Positive degrees indicates toe in.
Conditions for vehicle set-up are as specified for Holden WL models. For HSV height information for the WL refer
diagram below.
MEASURE SUSPENSION HEIGHTMEASURE SUSPENSION HEIGHT
FROM UNDERSIDE OF WHEEL ARCHFROM UNDERSIDE OF WHEEL ARCH
TO LOWER POINT OF WHEEL RIMTO LOWER POINT OF WHEEL RIM
B
B
A
A
SECTION A-A
SIDE PANEL OUTERSIDE PANEL OUTER
SECTION B-BSECTION B-B
MODEL WL GRANGE
WHEEL SIZE
FRONT
REAR
VEHICLE SUSPENSION HEIGHT AT KERB WEIGHTVEHICLE SUSPENSION HEIGHT AT KERB WEIGHT
Suspension Height Measurements in mm.Suspension Height Measurements in mm.
Kerb weight = Base weight + full tank of fuelKerb weight = Base weight + full tank of fuel
642±5642 ± 5
650±5650 ± 5
19"X8"19" X 8"
FRONT SUSPENSION HEIGHTFRONT SUSPENSION HEIGHT
REAR SUPSPENSION HEIGHTREAR SUPSPENSION HEIGHT
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4 Rear Axle
4.1 General Information
The HSV WL model is equipped with a limited slip differential.
Automatic transmission LS2 vehicles’ final drive ratio is 3.46:1 and the differential can be identified by Broadcast Code
TZA
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4.2 Service Operations
The differential oil must be changed at 45,000 km intervals. Use synthetic hypoid gear oil to HN2040 such as ‘Mobilube
SHC 80W-140 ID’.
The viscous coupling cartridge assembly is a sealed unit and must be replaced as a complete assembly if required.
General service operations are the same as those described in the Holden VS series Service Information however, to
determine if the Hydratrak coupling cartridge is faulty, undertake the following torque check. The Hydratrak rear axle
assembly is covered by the current Axle Warranty Changeover agreement between GMHAL and BTR Engineering (refer
GMHA Dealer Bulletins).
Torque Check
1. Place transmission in neutral with engine turned 'OFF'.
2. Jack up one rear wheel, then release park brake lever to fully 'OFF' position. Support vehicle body on a safety
stand.
3. Remove centre cap (alloy wheels).
4. Mark relationship of road wheel to axle flange. Remove road wheel attaching nuts and remove wheel.
5. Remove calliper attaching bolts and remove calliper from mounting, refer Section 5 BRAKES in the Holden
Commodore Service Manual No. 2. Support calliper on a wire hook. Remove brake disc.
Do Not Allow Caliper To Hang By Brake Hose.
6. Using a torque wrench in conjunction with adaptor, Tool No. 4A48, and torque wrench adaptor E6662B, rotate axle
shaft in forward direction. If the unit is operating satisfactorily, a torque reading of 35 Nm should be obtained whilst
turning the axle shaft at 20 RPM (e.g. one third of a turn per second).
If a torque reading of less than 25 Nm or more than 80 Nm (@ 20 rpm) is obtained, remove differential case and
inspect the differential components and repair or replace as necessary.
However, if the Hydratrak Coupling cartridge unit is faulty it will require replacement with a new Coupling unit, as it
is a sealed, non-serviceable fluid filled component.
Do Not Attempt To Repair Or Weld The
Coupling Unit.
7. Install brake disc and calliper. Tighten calliper attaching bolts to the correct torque specification.
NOTE
Caliper attaching bolt torque specification is
55- 70 Nm
8. Install road wheel.
NOTE
When installing the wheel, align the marks made
prior to removal.
9. Remove safety stand and lower vehicle.
10. Tighten road wheel attaching nuts to the correct torque specification.
NOTE:
Torque specification is 100-125 Nm
11. Refit wheel cover/centre cap.
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4.3 Limited Slip Differential
Precautions
When servicing a vehicle fitted with a Limited
Slip Differential (including Hydratrak type),
never run the engine with the transmission in
gear and one wheel raised. The driving force
to the wheel on the ground may cause the
vehicle to move.
NOTE
'On Car' type wheel balancers are not
recommended for use on the rear wheels of cars
equipped with a Limited Slip Differential. One rear
wheel will drive if in contact with the ground when
the opposite wheel is raised. This type of
balancer may be used by removing the wheel
opposite to the one being balanced with the
vehicle raised and supported on safety stands.
(Refit wheel nuts, reversed, to retain brake disc).
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5 Propeller Shaft And Universal
Joints
5.1 General
The HSV WL model uses standard GMHA propeller and drive shafts.
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5.2 Service Operations
Service procedures for propeller shaft assemblies fitted to HSV models are the same as those described in the Holden
WL Series Service Information.