If after a bit, pull the chunk and loosen the bolts just a little bit on the suregrip case itself...align the splines using an axle...and tighten the case bolts before pulling the axles out.
You said a narrowed rear, did the axles fit before?
What axle bearings are you using?
If the green bearings, was the thrust buttons or block removed from the suregrip?
Which suregrip....cone or clutch??? EDIT: I see cone in the OP