lego technic 9398 4x4 crawler mod with height adjustable suspension - YouTube
Lego Technic 4X4 Crawler Set 9398, Power Functions! COMPLETE & WORKING for Sale in Homosassa Springs, FL - OfferUp
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
Lego Technic 9398 Rock Crawler Preview | The Lego Car Blog
Amazon.com: LEGO Technic 9398 Rock Crawler : Lego: Toys & Games