Steering Vibration help

[MrChips]

Hoping someone might have some experience with having resolved a similar issue. It's a mk2 Tuscan, with upgraded discs (330mm front) and Ferodo DS2500 pads, both around 500miles old, with no serious use or trackdays etc.

Recently been having an issue with a wobble through the steering wheel during medium braking. Light or hard braking it doesn't show up so much, but under medium braking especially above 30mph, the steering wheel visually wobbles left to right. Car still brakes in a straight line, and you cannot feel any vibration through the pedal.

The usual culprit would be warped discs, or something wrong with the discs/pads however the discs are about 500miles old, and been checked with a DTI. Being the upgraded discs then i doubted they had warped.

So... what also needs to be checked? All bushes look good, so we're thinking maybe the track rod ends, or maybe even the rack itself.. would this vibration be a symptom of the rack failing?

[GreenV8S]

Worn ball joints can cause similar symptoms.

[Auntieroll]

Try changing the A/R Bar bushes if you are sure that the discs are not wearing unevenly due to hard spots.

[crossy67]

Have you checked the hubs for run out?

[MrChips]

Cheers all, Hubs have been checked for run out and are fine. My gut says it's something in one of the steering joints rather than the suspension as the car drives in a straight line. I think maybe some more testing to see if the frequency of the vibration increases with the speed of the car, or we start changing some of the joints and test as we go

[GreenV8S]

You should be able to check for play in situ rather than swapping components speculatively.