the slip yoke needs to have enough movement to accept the movement of the drive shaft fore and aft as the rear end moves up and down, it should not be fully in, so yes, 1.5" is probably about right

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics