rear end knocking noise on 2001 Ford F-350 Super Duty

when first stepping on the gas, I hear a knocking noise in the rear end. Don't hear it again, unless I start from stop position. Anyone know what that might be?

by in Stroudsburg, PA on April 17, 2009
3 answers
ANSWER by on April 17, 2009
It could be your drive shaft or your rear end. I would get this resolved because something will break at some point.
ANSWER by on June 26, 2009
to me it sounds like a u joint that has gone bad.
ANSWER by on December 06, 2009
check to see if your spare tire is tightened down. My spare did the same thing and dented my exhaust and I didn't even realize it until the cable broke and I lost the spare.