I have a clunk in rearend only when coming to stops when trans downshifts,has new transmission and front and rear flex discs and mounts,i replaced the rear axles with aftermarket ones a while don't know if diff or axle problem,no klunk on accel only when put in reverse or when trans downshifts,thanks for any help on this,put a used diff in a year ago but still has problem,maybe cheap chineses feq axles,dont know,HELP.