If it's stock or Production TT02 there's not much you can do.
Biggest thing is shim the suspension arms so there's less slop but no binding.
I reinforced the front upper and lower sections with a longer screw to prevent the knuckle from snapping.
CVDs on the front with cups (Yeah racing).
Trim the limiters. (see attachments).
Use really thick grease in the front diff (I use Lucas Red and Tacky). And keep the rear diff empty and clean.
Flip the shocks upside-down and add some Red & Tacky.
And use the Rakiri body.