There is ussally an o-ring recessed in a groove in the tunnel to keep the race from spinning. If it got warm the o-ring may have melted to the race. It should slide easy if you get a straight pull. You could make an easy tool with a lathe. make a plug to fit the inside of the race leave a lip to catch the edge . drill an tap the center for a small bolt. tap from cmpressor side or pull from back. you can put a small wiight to make a slide hammer if need be . Heat gun can be used if real;ly stuck.