tranny or rear??
tranny or rear?? 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 od 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..when humming is going on i can keep acelerating with no hesitation..car shifts smooth when daily driving and at wot ,i havent seen any problems..could it be the reat possibly? driveshaft ? any input is appriciated thank you
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Sometimes when Cats get old, they can rattle or hum. This happens at certain RPM's or at a certain speed/gear combination.
This is just a guess without hearing the car for myself. It could be something else. Just one thing to consider.
This is just a guess without hearing the car for myself. It could be something else. Just one thing to consider.
but it sounds like the noise is still there when the rpms drop and he is coasting at 55. I would lean towards checking u joints and rear. check the rear fluid level, put the car on stands, remove the driveshaft and check the u joints. while its out rotate the tires and listen close for any noise in the rear. if a bearing is failing you should hear something
