Moderate banging noise in right rear of 1997 RAV4 cruiser when going over mild to larger bumps

Moderate banging or thud noise in right rear of 1997 RAV4 cruiser when going over mild to larger bumps, I'm suspecting its the suspension but some reviews have suggested rear diff bushings, shocks(which I'm leaning more towards)or any suspension part. May be just me but car also feels a fraction lower sitting on the right(drivers) side, Any Ideas?Also a clunk or louder thud when shifted quickly into 2nd, 3rd or higher, could this be diff related or other?