I have a 2011 chevy duramax four wheel drive. I had it in 4 high at my deer lease and when i pulled out on the road i forgot to change to 2 high. It started shaking i pulled over and front end locked.
Inspect the front differential fluid for metal and look at the transfer case fluid also.
I smelt a gear oil when i got pulled over.
Not a good sign.
Im thinking maybe ringear and pinion shattered should see it when i drop gear oil.
It was shaking front end like a tire out of ballance.
Probably if you are smelling oil after the lockup something let go in the front differential and it could very well be a ring and pinion or perhaps the pinion bearing went, carrier cap broke or something like that. Post back and let us know what you found.
Looking for a Used Silverado 2500HD in your area?
CarGurus has 33,935 nationwide Silverado 2500HD listings starting at $2,998.
Search Chevrolet Silverado 2500HD Questions
Chevrolet Silverado 2500HD Experts