TD5 Steering wheel wobble at 55mph

[luca13]

Hi, 

Replaced the front and rear pads this weekend and had to remove one of the front Calipers to get the pistons back in. Car has now developed a pretty violent steering wobble at around 55mph and above. 

Was hoping for some pointers. Have been told that it is most likely the swivel preloads as had to remove the top swivel bolts holding the pipe bracket, but no shims were removed and bolts were tightened fully down after. 
Any help much appreciated 

[Snagger]

Callipers and pads shouldn’t affect anything, and refitting the swivel pin with the same shims should result in the same preload and steering characteristics.

I’d be taking a close look at the wheels and how squarely they are sitting on the hubs - you may have a piece of dirt trapped and holding a wheel off.  What type of axles do you have (10 or 24 spline) and what type of wheels?  If you have alloys on 10-spline axles, the wheel won’t pull down to the mating face of the hub as the hub centre protrudes about 3-4mm too far, resulting in a void between wheel nave and hub face.  That could easily be set unevenly when refitting a wheel, and many who have fitted alloys aren’t aware of the problem.

[Bowie69]

If it happened after brake swap, then it is possible you have a warped disc and a sticking caliper. 

The wheel judder is as a result of the pads grabbing the disc every rotation. 

The fact you mention having to remove the caliper to get the pistons back in tells you that, they were seized.

[paime]

+1 for checking if the wheels look out of alignment. It's quite easy to pinch the top swivel bearing when you're tightening everything back up. If you've done that then you'll likely need a new bearing as well.