Front differential on 2002 GMC Yukon Denali

I have searched around and found out that the noise I am hearing from the front end of my Denali is possibly the Differential. It's a loud whinning noise when the vehicle is 20mph or faster in motion. I need some insight and a estimate on the repair of such a problem

by in Riverdale, GA on September 13, 2009
1 answer 2 comments
ANSWER by on September 13, 2009
it sounds like the bearings went bad. Depending on how many hard parts besides the bearings, the repair runs from $900 for just bearing work to $1500 for gear set replacement.
COMMENT by on September 17, 2009
Dandd I have it in the shop now getting the gearbox replaced for about 1400..I guess you are right..Think I will have anymore problems in relation to that noise after replacing that?
COMMENT by on September 17, 2009
Also what is the best way to prevent this from happening in the future??
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