forgot to mention that the sy transfercase output shaft and sy driveshaft yoke is so much larger and therefore much stronger than the ty.
If you have yet to install it and have the Ty xfer case laying there, its only 5 bolts to disconnect the xfer case from the trans and swap them out rather than playing the swap out game with the yokes. Careful not to rip the gasket, but if you do, bust out the silicone.
:2cents: