Question regarding 2004 Chevy Suburban Z71. 195,000
I have had a whining noise coming from somewhere. Can't pinpoint front or back.
The whining would be there in acceleration and deceleration. It would get louder as you touch the gas.
Also- it has a rubbing sound that would change as the wheels rotated.
I changed the rear differential fluid a couple of months ago, but this didn't help.
This week it made some random popping noises as I would begin to accelerate.
It also started making a grinding noise as I turn left. This noise sound similar to worn out brakes
, but the brakes are fine.
Also, the vehicle wouldn't shift into 4lo. It would get the 4lo light flashing for 30 sec and then not engage 4lo.
I changed the transmission fluid and filter- about 12qts Dexron VI. (used the transmission cooler line to pump out all old fluid- 20 seconds at time. while adding new.)
Dropped pad and cleaned magnets- no large metal pieces. But lots of metal flake in the fluid.