as above when i reverse or even drive forward on full or nearly full lock, there is a horrible banging/ clunking sound from rear of car, also it feels like it is slightly jumping up, or im reversing over a small rock or brick or something. however on gravel, it just makes one of the rear wheels slip/wheelspin sort of on the gravel, as you can hear it.
any ideas what this could be?

 

does your car have a dccd? sounds like it may be on?

im not a mechanic just thought i would stick my 2 pence in!

 

no its not a dccd, its a 95 wrx auto, cheers