Steering Column Woes and Questions - Connector, Lower Bearing, and Coupler

If you must remove the coupler you can try packing dry ice around it. It should create enough shrinkage to break the bond between the parts. Assuming the roll pin is completely out. Make sure your hands are well insulated.

Why are you removing the coupler anyway? If it is that hard to move I would just wipe out the old grease and put in some fresh and be done with it. Yes, I am lazy.

As I am going through the various stellar efforts of previous owners, I'm finding myself a little less than enthused with the quality of a lot of the work. Any time I take something off, I have found it is a good idea to take everything off around it to inspect and repair as needed. This thing being jammed on there like that is giving me pause enough that I want to pull it for a very good cleaning, inspection, and taking a file to clean/de-bur the splines before installing the coupler rebuild kit. Plus with all the effort and beatings I've given it, I can't let it win! I would not be surprised in the least if the master spline was not lined up and someone just pounded it on with a sledge or something at 180 out to line up the pin hole.