Very easy.
Remove driveshafts, speedo cable, shift linkage, vacuum lines, and anything else connecting the transfer case to the transmission.
Use two jacks to support the tranny and xfer case seperately.
Drop the crossmember Lower both slightly to be able to reach all the bolts connecting the xfer and transmission.
Slide it back.
The linkage bracket on the drivers side may need to be removed to ge to a bolt or two but that was all that slowed me down.
Have fun.