Thread: Bouncy Steering wheel

This sort of effect on braking just about has to be a brake problem. If you had not replaced the discs, I would have said it was a warped or contaminated disc - in fact, it could be something as simple as greasy fingerprints on a disc, or alternatively a rust patch. It is possible that it is a loose or broken caliper, although I would not expect those symptoms from the caliper. Other possibilities would be an out of balance or unevenly worn front tyre or a bent wheel, although any of these would be expected to show vibration not just on braking.
John

If it DOESN'T happen braking normally on a flat surface it might not be that simple. I'm still trying to diagnose and fix the 100kph wobbles I sometimes get in the Disco.

If you are going downhill and braking, there will be more of a rotational force on the front end that braking on the flat - as in the front axle wants to rotate forwards with the wheels. This might be the only situation where you have enough play in the suspension bushes.

Doubt it's a broken caliper. Given the forces that these things apply they'll either be 100% good or damn near 100% bad.

To qualify all of this, I am STILL looking for the problem with my Disco!