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On-wheel balancing

Question :

AFTER a few rounds of off-wheel balancing, my steering wheel still vibrates when going at high speed.

Some shops recommend on-wheel balancing.

My friend told me that on-wheel balancing may cause a slight damage to the gear box or CV joints as the car is jacked up, the wheels are hanging loose and spinning fast.

Answer : On car wheel balancing is generally frowned upon nowadays because in front wheel drive cars when one spins the front wheel, the differential side gears are spinning around at high speed and may be damaged by insufficient lubrication.

The usual technique is to lift both wheels off the ground and use engine power to spin both wheels together and checking one wheel at a time.

Damage to the CV joints is not the problem as one would support the wheels underneath the front suspension lower arm and the CV joints would be relatively straight.

Actually, having said all that, if there are problems in balancing the front wheels, one should be checking the front hubs for run-out as the usual cause is run-out in the hubs and brake discs and sometimes even movement in the bearings.

 
 

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