I actually already swapped them yesterday and it went right in (other than the part that the yoke on the good driveshaft was seized on pretty tight). hopefully this thread will help anyone else who is needing to swap transmissions around that the 89 is different than the 87-88. I guess this would indicate that each year from 87-89 was slightly different with 87 having the smaller sized yoke without the pulse wheel/sensor, 88 having the smaller yoke with the pulse wheel/sensor, and 89 having the bigger yoke and pulse wheel/sensor.