Clonk noise

[Joshs03]

Need help, had rear brake pads fitted (been told no problems with them) O/S suspension arm fitted (been told no problem with that) and ever since I reverse backwards and brake and then forward and brake and then the clonk noise appears, anyone heard of this before? 

[Trevor]

Now that could be both suspension or brakes

Brakes is more like a clicking noise if the pads are moving in the carrier but if the caliper is loose then this will also make a noise
Check the caliper is firmly secured it will flop around and you will hear a clunking noise if not

If you place a wheel wrench on the wheel nut and move the car backwards and fowards with it that should narrow down the are of the noise