possible bad diff?
07-24-2012, 03:37 AM
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possible bad diff? 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?
