Nearly ..... depends on which way the motor is facing.
With a convensional 2wd a 3 gear places the motor so the pinion shaft is on the right hand side (viewed from above ... front away from you) so the rotation of the armature helps aid traction as Mike says.
In a mid mounted 2wd a 3 gear reverses this and so the 4 gear transmission is used to correct for this.
There have been belt driven 2wds (Schumacher and Kyosho) but to be honest there is was little too much drag in them compared to the free running gear trains.
I think that there is nothing revolutionary that can happen to 2wds with transverse mounted motors.
|