if it takes 5&3/4 turns to turn the st wheel from lock to lock, go halfway which is 2&7/8, which is centered. at that position wiggle the st wheel or the box splined input shaft at the coupler (my preference) R&L very slightly back & forth from the centered position like the hands on a clock not in/out & see how much play there is & I like a very small amount. then turn the wheel or input shaft from lock to lock both ways & it should be smooth with no binding from lock to lock. there is a FSM procedure for adjustment (recommended) which iirc you adj the big front locknut first then work with the slotted bolt on top with the 5/8 locknut but this'll get us started to see where we are at. Open the fill nut & see if it has lube.