Your progress is absolutely amazing.  I dont remember the first time I saw the basement, but you have made me and others that I run with drool.
One question on your volvo truck, does the wheel mount directly to the output of the motor gearbox?
Nate
More:  After looking over on scale 4x4 your font motor assembly looks very close to something I ran accross a few weeks ago.  It may be worth ordering 1 and seeing if it is a fit, for $13 it seems to be worth a gamble.
http://www.goldmine-elec-products.co...?number=G17949