Lego Technic 9398 - C Model + Instructions By Jono Mckinlay - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
4 x 4 Crawler : Set 9398-1 | BrickLink
Lego Technic 9398 - C Model + Instructions By Jono Mckinlay - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Ultimate upgrade for the 9398 4x4 crawler with pendulum steering (no servo needed). I also made a pendulum steering file in the rebrickable link you can download and have a closer look