Is there a bolt in Diff Swap ? I would like to change gear ratios in my 97 318ti to something more highway friendly like a 297 or something there a bouts, But I would just like to swap the rear and not the axles too. Is there a direct bolt in Rear diff that will work for me,? I am new here and new to BMWs, So please be direct, Like, I need a E-?? rear and it will swap right in, Thanks all! Peter |