Here's my situation, when I put my car ('51 bugeye wrx wagon) in reverse and start to accelerate in reverse I get this grinding sound, as well as the usual common gear whine. If I'm reversing very slowly I do not hear it, but once I gain a little speed in reverse I hear the grind and it does not go away as I accelerate. There is no problem getting in gear (that is perfectly fine), the problem is when I am already in gear.

I have seen lots of forums with this kind of problem described and some drivers have even accepted it as a feature of the car but mine never used to make this noise which tells me something's not right somewhere. There was a slight rattling coming from underneath the centre of the car the other day but this appears to have stopped now.

I have read that someone else who has experienced this problem found their exhaust flanges to be rubbing on the drive shaft. Others in a post on the general community board have suggested to me that it could be the clutch release bearing but I have briefly spoken to an independent subaru garage and they seem to be ruling out clutch release bearing from what I've described.

Any ideas?

 

its prob your brake pads mine dont like going backwards either