I tow a 1986 Subaru BRAT, which is a fun little truck. By default, the caster setting is too low and the steering locks on moderate turns. This is a known problem with early Subaru models. I aim to diddle with the caster, but, in the mean time, I put a pair of heavy black bungies between the sides of the steering wheel and eye-bolts on the floor and the steering moves as I turn but the bungies pull it back straight.