Bankging knocking from rear

[boolaly]

I had all four tyres changed yesterday on my 172 cup, theres an obvious loud banging now when going over speed bumps coming from the rear only. It was was absolutely fine before hand.
Also you can also hear the rear suspension grinding/noisy when you wobble the car from side to side when stationary.
The car was lifted up on 4 jacks rather than a ramp but can't see how that would cause anything to go awry.
Anybody have any ideas?

 

[Goodj]

It wont have any bearing on you having new tyres.
Period.

Not unless, to fit them, they took all your suspension and brakes apart.

 

[Daniel]

If you have lowering springs on the car, the chances are one/both of them fell out.

 

[Briv6]

Hmm make sure wheels are on properly

 

[boolaly]

Sorted now, one of the lowering springs on the rear had come out of place. Thanks all.