240sxSliderr

Alright whats up guys, I recently bought an S14 and got a new clutch installed and finally got to drive the car. None the less as soon as I drove it I have a banging noise when I put the clutch in, let off gas and to me it sounds like its coming from the passenger side of the rear. Its not a clunk it sounds like someone knocking on your car but about 5x louder (kinda hard to relate it with something). Well before anyone says did you use the search bar, I have. Ive came up with diff bushings, driveshaft joint, control arms, axels etc. I took the car today to my mechanic and he said I need to replace my front mounts for the rear (i dont know what he meant by that but didnt sound to well) and I also felt the car vibrating from the rear (from my perspective) the bang is annoying and I want to get it fixed before any more problems occur then what I have besides this one and some other ones which are easy to fix. If anyone can help me or if you have the same problem and managed to fix it and mind telling me that would be great!! Ive jacked the car up yesterday with my dad to see if we can find anything wrong and had no luck! Thank you for those who can help - Matt