Originally Posted by
Odin544
That will never give you the same gear ratio.
It would have to be big spur:big pinion vs small spur:small pinion with same gear ratio.
In that case you change where the weight of the motor is. Either more forward or more rearward. I personally don't ever worry about it. It wont make a difference for me or most people I know.
It's a big difference in pan cars. Really big difference.