you should check the rear brake assem. or possibly the trans fluid & your lube ponts

 

Yeah all my wheels spin freely i've even adjusted my brakes to do so, My tranny just got new fluid a few hundred miles back and both diffs just got changed last week.

 

I did a compression check today I only had time for the number 1 cylinder I did forget to to have the throttle wide open but when I did it the cylinder cam out with 120 I then squirted oil in the cylinder and it brought the compression up to about 140 -150