'40 rear fender rub one side only

[HDowse]

It’s unlikely but the transverse spring might not be centered. The bolt that holds the spring together has a square head that fits into a square hole in the center of the rear cross member. It’s not too much of a job to undo the 4 nuts that hold the spring up into the cross member and check that the square is in the hole. Those of us who have pulled transmissions know the procedure pretty well but jack up the axle, put jack stands on the frame and lower the axle just enough to check that side to side alignment.