conversion to a 2 gear speed box with 4WD

You do not want to drive onroad only? And you are searching for a low-priced way to get a all wheel drive gearbox?convert your Tamiya-3-gearbox? Further on you have to save space, because your truck has a short chassis. (MB1838, Volvo) 

The solution is very easy!
We convert your Tamiya-3-gearbox to an 2 gear all wheel gearbox. This way we shorten the gearbox about 33mm and so you have enough space to install a driven front axle in the short chassis version, too.