Zantza

A properly geared M-motor will give you much more precise steering than a servo, plus the M-motor is cheaper. Here is a comparison of V1/V2 receivers: http://www.philohome.com/pfrec/pfrec.htm. You'll want the V2 receiver.

I wouldn't use the speed computer:

Thank you for the positive feedback guys! Yes, there are 8-tooth gears in the drivetrain, in the portal hubs near the wheels. The thing behind the cab is what you would put the "roof" of the bed on. Google a picture of the real one, I'm sure you'll understand. I'll see what I can do about the video, but I won't guarantee anything

Hello people of EB, this is my first post here. So, this is an army truck used by the Finnish military. The building process took about a month for me. The drive motor is of course an XL-motor, which is hooked up to Sariel's 2-speed trial truck gearbox. I'm sure you can find it on his site. Shifting gears works with remote control, and so do drive and steering of course. Inside the gearbox are the gears 12/20 and 16/16. One XL-motor has plenty of torque to drive this thing, especially with the V2-receiver. Both axles have 3-link live axle suspension. Front axle has hard yellow shocks, and rear axle has soft red shocks, for obvious reasons. The real truck has leaf springs, but as you all know they are rather silly to do with Lego. The steering M-motor is sitting on top of the front axle and is geared 8/40. The doors can be opened and the 5-cylinder engine in the cabin is attached to the XL-motor. The real Sisu has a 6-cylinder engine, but I couldn't fit that. At the rear of the truck you can find a spare tire, which is a lot smaller than the other tires due to lack space and saving weight. Sorry for the bad pictures :/