View Full Version : possible bad diff?

07-24-2012, 04:37 AM
on my 99 z28 4l60e ivd been notecing some sort of huming but only when car goes into over drive 45+mph..i thought tranny was going out ,but ivd been doing some test as the humming starts i keep going and about 55mph,put her in neutral and it keeps doing it therefore i belive its not the tranny ..any thoughts driveshaft? diff?

07-24-2012, 03:55 PM
No comments ? Anyone