[suicideneil]

Power plant = most likely an MMM or MMPro, motor will need to be L or XL sized- aiming for 30mph here in order to make the thing handleable (that is a word I swear).

Axle reduction ratio = 2.1:1

Its a curious beast though- the gears in the axle & tranny are MOD 1.0 by the looks of it, much the same as the ones inside the emaxx tranny, though the down side is the axle gears are made of moulded pot metal (looks like the same stuff the input gears in the old emaxx tranny are made of- aluminium?)

From what I've read, they do tend to wear down after a while, but they stood upto my hvmaxx for a fair while back in the day :/

I would use an emaxx or similiar tranny if you plan to go fast-ish, the stock tranny limits you alot as you can only fit upto a 20t pinion, no other gearing adjustment possible (via the spur etc).