I want to at least start toying with the idea of building a TTTT and I was thinking of using a small rc car(bit like) receiver and a rack and pinion steering deal with a bit motor or hopefully larger motor. and a servo tranny and motor for the main gear reduction and trans. I can pretty much build everything but the diff.

front axles might be hard to build since I need to fab a lot of stuff which I can do easy, but I am really concentrating hard on school right now. so if anyone has a part or parts or anything for a TTTT I would be VERY grateful for your help and time. I will GLADLY pay for a part that I cannot build or do not want to try and build.
Thanks a lot you guys. I've been fascianted by TTTT since I saw a german website on google and i realized that I can do it with all the topics I've read here it's more possible. and once I get a job I will be able to afford building a 4wd or something (after some learning curves of course.

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P.S. this is an edit
How do I remove the thing that stops servos from moving like a regular motor? you know how they can only move so far? and also how do I make the servo a MSC??? thanks guys