Jaguar XJ (X350). Service manual — part 44

Rear Ride Height Measurement

Item Description

1

Ride height

Wheel Track

Item Description

1

Front track

2

Rear track

Crabbing

Item Description

1

Front track

2

Rear track

3

Crabbing angle

Crabbing is the condition in which the independent rear suspension (IRS) system is not square to the

chassis. Heavily crowned roads can give the illusion of crabbing.

Wander

Wander is the tendency of the vehicle to require frequent, random left and right steering wheel

corrections to maintain a straight path down a level road.

Shimmy

Shimmy, as observed by the driver, is rotational oscillations of the steering wheel which may come

and go over time, generally resulting from wheel and tire imbalances.

Shimmy can be experienced at any speed but generally between 80 to 145 km/h (50 to 90

miles/hour) and is most often experienced on smooth roads at steady speeds.

Nibble

Sometimes confused with shimmy, nibble is a condition resulting from tire interaction with various

road surfaces or brake disc irregularity and observed by the driver as small rotational oscillations of

the steering wheel.

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Poor Returnability of the Steering

Poor returnability of the steering is used to describe the poor return of the steering wheel to center

after a turn or the steering correction is completed.

Drift/Pull

Pull is a tugging sensation, felt by the hands on the steering wheel, that must be overcome to keep

the vehicle going straight.

Drift describes what a vehicle with this condition does with hands off the steering wheel.

•

A vehicle-related drift/pull, on a flat road, will cause a consistent deviation from the straight-
ahead path and require constant steering input in the opposite direction to counteract the
effect.

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Drift/pull may be induced by conditions external to the vehicle (i.e., wind, road crown).

Vague On-Center Feel

Vague on-center feel is characterized by little or no buildup of turning effort felt in the steering wheel

as the wheel is rocked slowly left and right within very small turns around center or straight-ahead

(under 20 degrees of steering wheel turn). Efforts may be said to be "flat on center".

•

In the diagnosis of a roadability problem, it is important to understand the difference
between wander and vague on-center feel.

Suspension Design Height Setting – Armoured vehicles

Special Service Tools

C Spanner
204-603

C Spanner
204-603

CAUTION: The shock absorber and spring assemblies must be replaced in axle sets. Failure to follow this

instruction may result in damage to the vehicle.

CAUTION: The suspension design height setting procedure must be carried out when the shock absorber and

spring assembly or suspension components have been removed or renewed. Failure to follow this instruction may result
in damage to the vehicle.

CAUTION: If equipped, make sure that the spare wheel and jack are removed from the vehicle before carrying out

the suspension design height setting. Failure to follow this instruction may result in damage to the vehicle.

CAUTION: Make sure that the fuel tank is full of fuel. Failure to follow this instruction may result in damage to the

vehicle.

CAUTION: Make sure that the vehicle contains no luggage or passengers. Failure to follow this instruction may

result in damage to the vehicle.

CAUTION: This procedure will need to be carried out on all four shock absorber and spring assemblies. Failure to

follow this instruction may result in damage to the vehicle.

NOTE:

The shock absorber and spring assemblies are supplied as complete assemblies and are not servicable.

Published: Mar 28, 2014

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