So today i started to hear a clunk noise when i put my truck in to drive/ reverse. Im in IL and its 5 degrees out and all but I've had my truck in the cold before so it weird to me now... I ran in to a guy over the summer and he was replacing the barrings in his reared of his GMC (03, same as mine) with the same amount of miles...Im wondering if its that or something else.... About 4 months ago i had my U-joints replaced( cracked one, and just had both done for a C.M.A).. Any input???

 

What truck are you working on?

2 wheel drive or 4 wheel drive?

Is it when you are moving slow or at any speeds?

Where is the sound coming from?

 

Id check those U-joints. A cap could have fallen out if not put in right.

Plus all you have to do is lay under the truck to check them.
Hope this helps

 

I think this noise for auto-gear box lubrication issue. I think it is better to check the oil level in the box.

 

its when im in two wheel drive... going fro park to drive or park to reverse.... it sounds like its under me... by my trans or dif.... its not my u-joints those were just replaced...

 

Before you tear your rear end apart, lube the drive line yoke where it goes into the transmission. That clunk is a common problem and the lube usually takes care of it.
vp