I just noticed it as early as this past weekend but you can only hear it when the windows are down where it echos off of anything besides the truck. It only does it when under acceleration and the clicking gets faster as the truck goes faster. Any ideas on this? I cant really tell for sure if its from the diff or one of the wheels. Ive looked just to check there wasnt some stick or loose bracket just slapping against a wheel. Its a Z71 if that might help out. O yeah. I looked and it seems like my diff cover might have a small leak but nothing more than Ive seen on my past trucks should I get that gasket replaced? Thanks alot guys

 

G80

 

Mine does this as well..

 

Gren80

 

Just had it replaced in December...

 

Mine made that same clicking sound, 2 days later it **** it self, big mess.

 

Could be as simple as a u-joint or if you have a 2 piece driveshaft your carrier bearing may be going out.

 

yeah it doesnt do it when im turning just giong straight. How much does it cost to hev that thing replaced and why would it go bad I mean it an 04 with 100k on it? I put 250k on my last Z and that never happend and my dad put 150k on his 3/4 duramax with no probs? thanks a lot by the way