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Old 02-12-2008, 11:17 PM   #1
TC70C10
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Join Date: Nov 2001
Location: Harvest, AL 35749
Posts: 337
Help with thumping sound in 4WD

Trying to determine if my NP 205 is ready for rework. In 4wd under any kind of load I get a thumping sound. If I leave the hubs locked and go 2 high, No noise. Front drive shaft has all new u-joints. I put a 4 inch lift on a couple years ago and I can't remember if it made the noise before or not. Running 33 inch tires

Any advice would be appreciated.

Thanks,
Tim
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1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch
1995 T10 Blazer 4.3L 4x4 (Son's)
2004 GMC Envoy 4.2L 2WD
2005 GMC Sierra Crew Cab Z71 4x4 5.3L
240 Fun Finder Travel Trailer

Harvest, AL 35749
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