Mechanics

1999GMC SIERRA 2500 4X4 161,000 MILES

1999 GMC C2500

Going down the road I got a severe shimmy and shake from the rear of the truck. When I stopped, there was a burning rubber smell and smoke coming from the rear differential. No clunking or heavy metallic noises, and the axles never froze up. I can put the truck in gear and move it forward and back. We towed the truck approx 10 miles in neutral at 10 miiles /hr. Any faster than that and the shimmy started again. What are the possibilie problems and how severe could it be?
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Sledrunner6632
May 19, 2007.




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