Wheels - 20 Inch Wheel Installation Limitations

No: LS204-001
Issue: 2
Date: 08 Sep 2005

Updated information is noted by asterisks.

SECTION: 204-04

20-inch Wheel Installation Limitations

AFFECTED VEHICLE RANGE:

*Range Rover Sport (LS) 6A900505 to 6A917472
Vehicles built with 18 or 19-inch wheels*

CONDITION SUMMARY:

SOME STEERING RACK CONFIGURATIONS LIMIT WHEEL OPTIONS

Situation:
20-inch wheels installed on a vehicle originally built with smaller wheel sizes (18 inch or 19 inch), may lead to customer concern of steering shimmy and steering "pull" under heavy braking if the vehicle is not equipped with a "damped" steering rack. 20-inch road wheels can only be installed to vehicles that are equipped with a damped steering rack. Some non-supercharged vehicles do not have a damped rack.

Action:
Should a customer request a 20-inch wheel installation, refer to the Service Information detailed in this bulletin and inspect to ensure that installation of the 20-inch wheels is possible if the vehicle was manufactured prior to VIN 6A917472.

PARTS:

*RRC500681MNH 20-inch Alloy Wheel (Standard on supercharged models)

RRC504700MCM 20-inch Alloy Wheel and Tire Assembly (Available 11/05)*

NOTE:
RRC5O47OOMCM may not be installed on supercharged vehicles with Brembo brake systems.

WARRANTY:
Information Only

REPAIR PROCEDURE

INSPECT STEERING RACK PRIOR TO 20-INCH WHEEL INSTALLATION

NOTE:
Range Rover Sport vehicles have been manufactured with two types of steering rack, damped and non-damped.

^ Vehicles manufactured with 20 inch wheels as original equipment are built with a damped steering rack.

^ Vehicles manufactured with 18 and 19 inch wheels may have either a damped or non-damped steering rack.

CAUTION:
20 inch wheels may only be installed to vehicles with a damped steering rack.

1. If 20 inch wheels are to be installed to a vehicle prior to the safe VIN that was not manufactured with 20 inch wheels, inspect the vehicle to determine if it has a damped steering rack.





2. Refer to Figure 1 for assistance in identifying the two rack types:

^ Illustration A depicts a non-damped steering rack with steering fluid pipes entering the rack perpendicular to the rack housing

^ Illustration B depicts a damped steering rack with steering fluid pipes entering the rack parallel to the housing through cast bosses in the housing body.





3. Inspect the steering rack configuration from the wheel arch area to determine if it is a "damped" type. (Figure 2)





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