yall do understand the t-case skid is the only thing holding the back half of the drivetrain up, right? there are three mounting points of the engine/trans/t-case...2 motor mounts and the tranny mount.
you need to support the transmission when dropping the t-case skid.
I don't know what you mean "rebuilt" the skid??? You can clean it to bare metal with a wire wheel cone on an angle grinder, and coat it with something like Chassis Saver or POR15. If it's rusted out bad, just replace it...with something called a tummy tuck
. If the nutserts are spinning in the frame, you'll need to replace them, see this write-up