Differential Clearance & Vibration
Posted: Wed Mar 02, 2005 3:10 am
My S1 has long been suffering from a harsh, high frequency vibration on overrun or trailing throttle. I finally inspected the diff mounts and it appears that the bottom front of the large diameter (banjo) section is almost touching the chassis. On overrun it would seem that the torque reaction would try to lower the front of the diff and close the tiny gap that exists.
If this is indeed what is happening, I have the choice of removing one of the spacer washers (there are two) from each of the top mounting lugs to raise the whole unit, or perhaps trying to shorten the lower mounting rods in order to raise the nose of the diff. Does anyone have any experience with this sort of problem? Are there any other potential causes for the vibration? All rubber mounts and bushings are in good shape with very low mileage but are more than 10 years old.
Thanks
If this is indeed what is happening, I have the choice of removing one of the spacer washers (there are two) from each of the top mounting lugs to raise the whole unit, or perhaps trying to shorten the lower mounting rods in order to raise the nose of the diff. Does anyone have any experience with this sort of problem? Are there any other potential causes for the vibration? All rubber mounts and bushings are in good shape with very low mileage but are more than 10 years old.
Thanks