Rear diff change on a w124 300ce
Hi all, I am looking for some help on making a diff change on my 1993 w124 300ce(M104 engine). I currently have a 2.65 diff on the car but feel that the car's acceleration is a bit sluggish/lazy. I would like to get some insight as to which diff to get so as to improve acceleration but still be able to do highway driving without reving like crazy. I have been told that my best options are probably a large 2.87, 3.06 or 3.07 rear diff. I have recently found a 3.06 rear diff(part number 12894683.06) taken off a w124 E280, the cluster from the car which it was taken off is also available. Can anyone tell me if this diff will fit on my car and what performance results should I expect to see? Which of the options, 2.87, 3.06 or 3.07 is most appropriate for me? I am looking to get faster all-around acceleration and willing to give up some top-end speed(hopefully not too much) but also want the car to be drivable on the highway. How much will a change in the diff affect my fuel efficiency? Any help that anyone can provide regarding the above, part numbers for the diff/cluster, model car which the parts originally came on, leads on where I can get the parts would be greatly appreciated! Thanks in advance.