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MG MGB Technical - Steering Wheel Feedback

When braking my 79GT I get enormous amount of vibrations via steering wheel - any ideas? Just fitted new tyres and had them balanced and aligned. New front brake discs also fitted. Any suggestions welcomed.
Barry Hill

Did you check the run out on the new discs?

If assembled with any dirt or metal burrs on the flange you will have excessive runout which will shake the steering when braking.
Chris Betson

Do you have wire wheels? They could be the problem.
Have you checked for play and the front end, Steering rack, kingpins, a-arms bushings?
All could be contributing to the vibration.
steve

Excessive end float in the wheel bearings ?
Miles Banister

Did you you have the vibration before the new tires were fitted? If not I would go back to
the tire shop. Here in the USA all tires are not created equal and some budget tires can
cause problems. Clifton.
Clifton Gordon

Gotta be the discs if it only happens under braking, particularly if it didn't do it before ...
Paul Hunt

Try swapping the wheels front/rear. If the vibration follows the wheels, you know that it is the wheels. If it doesn't, start looking at the front.

Is the pedal pulsing regularly? A warped rotor will do this. It feels like the brake system is pushing back when you press on the pedal.

Warped rotors (especially those that suddenly warp) are often a sign that the brakes have overheated. It can also be caused by someone getting too enthusiastic with a high-powered impact wrench when reattaching the rotors and/or wheels.
Paul Noble

Sounds very much as though you have run-out on one or both discs. Did you thoroughly clean the mating surfaces of the disc and hub before assembly, any paint or dirt between the surfaces can be enough to cause run-out. Check run-out with a dial gauge attached to the body of the caliper with a magnetic block. The tolerances are given in the workshop manual.
Regards
Graham
Graham

This thread was discussed between 27/06/2002 and 02/07/2002

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