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 9398 4x4 Offroader in Nordrhein-Westfalen - Lünen | Lego & Duplo günstig kaufen, gebraucht oder neu | eBay Kleinanzeigen