ok as gut wrenching as it is what u have to do is firmly support the controller and yank the wheel u should here and feel a click but be sensible only medium force is needed and support where the wheel mounts.
ive had it happen to me it as if the return spring doesnt work? if so thats ur solution.
btw i was told to do the by rc champ ok so it isnt some hack fix as he asked sanwa and thats the way to fix it ok.
itll be fine just a nice jerk till here a click and should be perfect again
to make Keith happy