How an R/C Rockcrawler Works – Dirt Every Day ExtraAugust 13, 2017 by admin 0 Comments Videos Share on Facebook Share on Twitter Share on Google+ Share on Pinterest Share on LinkedIn On this episode of Dirt Every Day Extra, Fred Williams learns all about the new Traxxas TRX-4 rock crawling R/C car with real portal axles, locking differentials, … Share on Facebook Share on Twitter Share on Google+ Share on Pinterest Share on LinkedIn Products You May Like