Drivetrain jerking and popping

[99.5-7.3 Dually]

I have a 1999.5 f-350 dually 4x4 crew cab long bed with 196k miles on it and whenever i let off the gas and get back in it my truck kind of jerks and makes a popping sound, but it only does it when you let up and get back in the throttle. i was told the chain in the transfer case was stretched so i just pu a transfer case in this afternoon and ran it up the road and it is still doing it and i dont know what else it could be. becasue the rear end had some slack in it but that has already been taken care of. any ideas as to what it could be? i would greatly appreciate any help

[silveradobeast]

does it feel like its in the back or front?

[99.5-7.3 Dually]

its coming from the rear i can tell but it seems to have mostly gone away after a few weeks im going to check my midshaft and grease everything and see what that does

[bens99f350]

probably not your problem since you changed out the transfer case you likely would have noticed, but mine was from the front of the midshaft not being bolted up tight... 3 of the 4 bolts holding it together were finger tight only... discovered it when I replaced the carrier bearing assembly. Also went ahead and just put new u-joints in while I was at it and found one of the u-joint cap clamps was busted in half.. pretty spooky to me since I had just returned from a 2,400 mile round trip! All is good now though.