Power divider input shaft broke? Driveshaft turns, truck does NOT move

In layman's terms, power is going to take the path of least resistance. Hence spinning wheel or broken spider gears in your power divider. . I would replace the whole power divider with a reman.

 

All depends on how many miles are on it and how it's been used. If ring pinion look good and carrier bearings are tight you probably be fine just replacing power divider assembly. How's the oil look? Full of metal ?. If all else looks good run it.

 

That metal is prob all from the pooched powerdivider. With those miles I wouldn't be afraid to throw a reman power divider in and run it.
It likely let go from extream shock load . Only way you explode the spiders gears like that.

 

Well that settles that then LOL. I think I'd be looking more of the driver than what trailer you're pulling

 

Good that was quick.