puttin a type r lsd in a b16 i have a gsr ring gear on the diff already and i knw i have to shim it for proper gear hieght...do i have to shim both sides of the diff between the case and the case bearing? whn i put the diff in to test fit the ring gear or somethin seemed to b rubbing on the inside of the case...also is there anything else i need for the install someone told me i might need to change my counter shaft also...i have searched but havent found a definite answer. please help!!!!