Question about 1999 GMC Suburban
I had full service done, Radiator,brake,engine,transmission and rear axle gear box oils replaced. 54,000 miles Was told everything looked good. Days later I was on the road for 2 hrs with ac running pulling boat and was about to clime hill so we turned off ac and rolled front windows down. A propane type smell hit us. Could not figure out smell and it would not go away. Only smell it when we are moving. Only smell it when window is down and we are moving. I brought it back to Chevy dealer and they said they think the rear axle gear box got very hot and created the smell and was released through the breathing tube. They think the gear box is going out.They replaced oil again. Was told once more the oil had no metal shaving and it looked good. My question; How hot can oil get before it starts to smell. Is it possible the gear box is going out...Or Help
No the ring and pinion seems ok from what you are saying...you wouldn't smell it up front while moving do to wind and what not,
oil can smell at low temps.
you may have an exhaust leak at an O2 sensor seal. or something relative to that.
Posted on Aug 17, 2008
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Posted on Jan 02, 2017
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