I can bolt the column up and get the shaft started on the gear box but that's it. The coupler is all the way out. If I had 3/4 of an inch it would go on but that's still not right. I would say 2 inches is what I need.. My tip of threaded end to tip of the coupler fully collapsed is 38 1/2 inches. I was trying to find someone who has a shaft to measure or knows the lengths.