mad force conversion to twin force

[tonka truck]

Mike: the three speed gears are stripping. On the inside there is a bump which the clutch engages. It was this bump that wore. Even new out of the box it shredded the gears and so was the mesh was factory set. I was thinking that the flywheel clutch on the engine may have smething to do with it.

For conversion, would you be able to supply me with the kyosho parts?

Dafni: I was looking at keeping the truck stock, except to get the spur, pinion gear setup and drill holes to suit on the exisitng chassis plate (save a few $$$)

For performance, looking to use x2 8.4 NiMh (GP3300) packs (16.8v in total). What motor will achieve a good balance b/w run time and accerelation/ speed (similar to nitro)