Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi there, thanks for requesting me.IT sound to start with like your tires may be different sizes or worn differently. So we need to check the ruling circumference. In a flat parking lot make a mark at the very bottom of each tire. Then drive ahead 1 full turn of the tire until the left front is back at the very bottom. Then compare the marks. All must be with in 1 inch. More than that will cause issues in the transfer case and a noise like you have described. Ofcourse if you have 2 new tires and 2 old or difference sizes then this test is pointless. All tires must the the same. Your uncertainty of the noise makes me think the noise is actually the noise created when the clutch pack slips, which is a low odd growling noise that pulses on and off. Does this sound right?
O, do the check I suggested next and see please.
If you could pinpoint the location of the sound, where would you put it at?
Ok, is there any contamination in the fluid of any of the diff or transfer case?
My honest thought is the front axle sliding gear itself may either be in backwards or there is a problem there. This could be checked without much trouble, only removing the axle assembly on the passengers side.
The leading edge is chamfered to allow it to mesh. Backwards has it flat edges together and it would not engage and the sound you may be hearing is that.
Ok, has anyone had this apart?
Did this work properly the last time or last year?
OK so tires are bigger. This brings me back to the first test I mentioned, before we do anything lets try that and see the results.
It’s the place to start and it costs nothing. Lets reconnect when you have that.