Traxxas 4-Tec Conversion

[BrianG]

Picked up a good deal on a used nitro 4-tec. I told the guy what I didn't need and he lowered the price accordingly. Made me happy as I don't need to find a way to offload the stinky nitro stuff I won't use.

It came looking pretty much like new, except for a little under chassis wear.

First thing I did was lock the two-speed spur into second gear and removed first gear altogether. To lock it, I used the method similar to how I did my Revo wayyy back. A little dremel work, a couple 4mm screws, and a bunch of JB Weld later:



Actually, this is V2. V1 had about 1mm of spur wobble that I found unacceptable. V2 was done the same way but more carefully.

I then modded the rear-end a little and make a motor mount out of some 6061-T6 aluminum angle stock:



The next two pics show the spur adaptor and optional 45T spur mounted. The 45T is really supposed to be 1st gear, but I made a little spacer (white ring) to make it fit right as 2nd gear.





This arrangement lets me use pinions ranging from 14T all the way up to around 20T. And they're Mod1.

More updates to follow as I make them. I'm not too gung-ho on this project, but it gives me something to do between doing things to my XT8 project...