For 1990-2009 cars

## Tire and Wheel Assembly Balancing - On-Vehicle LWB SWB

Important: The tyre and wheel assembly must be balanced off vehicle before attempting to balance the tyre and wheel assembly on vehicle. Refer to Tire and Wheel Balancing.

If after following the tyre and wheel vibration diagnostic process, some amount of tyre and wheel vibration is still evident, an on-vehicle high-speed spin balancer may be used to perform an on-vehicle balance in an attempt to finish balance the tyre and wheel assemblies, wheel hubs, brake rotors and wheel trim, if equipped, simultaneously. On-vehicle balancing can also compensate for minor amounts of residual runout encountered as a result of mounting the tyre and wheel assembly on the vehicle, as opposed to the balance which was achieved with the off-vehicle balancing procedure.

Important: Note the following information before performing the on-vehicle tyre and wheel balance:

• | Vehicles equipped with low profile, wide tread path, high performance tyres and wheels are susceptible to small amounts of dynamic imbalance.

• | When performing an on-vehicle balance, care must be taken when placing the wheel balance weights on the wheels. If the wheel balance weights are not placed accurately, they can induce dynamic imbalance and increase the severity of the vibration.

• | Inspect the wheel bearings to ensure that they are in good condition. Refer to Front Wheel Bearing and Hub Replacement or Rear Wheel Bearing and Hub Replacement.

• | Thoroughly inspect all on-vehicle balancing equipment and make sure that it is within the manufacturer's recommended specifications.

• | Do not remove the off-vehicle balance weights. The purpose of on-vehicle balance is to fine tune the assembly balance already achieved off-vehicle, not to start over.

• | Leave all wheel trims installed whenever possible.

• | If the on-vehicle balancer calls for more than 56 g (2 oz) of additional weight, split the weight between the inboard and outboard flanges of the wheel, so as not to upset the dynamic balance of the assembly achieved in the off-vehicle balance.

| Perform the on-vehicle balancing procedure in accordance with the on-vehicle balancer manufacturer's instructions.