I have a 1977 Marathon (resistor cart). The problem is it is faster in reverse than forward. The half speed wiring for reverse looks to be removed. I have checked all the other wiring, replaced the F&R switch, micro switch and resistor coils. It only has one micro on the F&R. I have also tested the batteries with and w/out load, all tested 36.4 v. Would replacing the half speed wiring solve anything for the forward speed or is this just common for reverse to be faster? Thanks.