My 98 Ram has a tick in the T-case only when engaged. In 2H there's no noise.. In 4H there is. Haven't tried 4L as I don't use it much. But any how. Can anyone tell me what it could be. I have heard the Drive chain gets stretched. If it is the chain how hard is it to do?

 

Search for T case saver thread...and check yours. Mine is 2wd, so I don't know any more than I have read on here....

 

Checking the fluid in it couldn't hurt...

 

this t-case saver install instructions show you how to check the rear snap ring.
https://dodgeforum.com/forum/2nd-gen...ter-added.html

but - id guess the ticking to be a drive shaft u-joint.
first it ticks, then clicks. then clacks. then falls out.

 

I had a similar problem except after a while with the ticks she would try to go to 4x while your in 2wd and she would grind real bad....turns out my tcase shat the bed due to low/ no fluid

 

Could be the Cardan joint on the front drive shaft.

 

Whatever it is I can feel in the shifter. I have just changed the fluid. and had the rear tail stock off and everything seemed fine.

 

I've checked U joints in the front also... I'm wondering if the chain spins in 2H along in 4 also. Does anyone know.

 

no. chain only turns in 4wd.

can you safely put the truck up on rear jack stands and run it and duplicate the sound.

 

Yea. I'll do that soon. I'll post a video to youtube. then put the link in here. Lemme know what you's think.