i had the u joints replaced in the front end differental on my 03 3500 and i went to use the 4wheel drive the other day and it made a bad noise around the transmission do any of you have any ideas about what it could be

 

Mike,

Can you be a little more specific.

Which u-joints were changed? The one on the front driveshaft, closest to the diff or the two outer joints on the axle shafts.

As for the noise, changing u-joints won't cause the noise you heard. More than likely the t-case linkage is out of adjustment.

I have a customers truck here at the shop that we had to send up to the dealer to get a new t-case for very much the same reason you're describing.

The t-case linkage was out of adjustment for so long that the gears weren't fully meshed and it destroyed the high range gear in the t-case.

When he put it in 4WD, it would grind and as soon as load was put on the front end the t-case would start popping as the gears jumped teeth.