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
LOT 4 - LEGO Technic 94.8 x 44 R Tires Wheels Set #9398 4x4 Crawler | eBay
LEGO+TECHNIC%3A+4x4+Crawler+%289398%29 for sale online | eBay
LEGO TECHNIC 4x4 Crawler 9398 for Sale in Riverside, CA - OfferUp
Light Kit For Crawler Vehicles 9398 – LeLightGo
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 4X4 Crawler (9398) Building Kit 1327 Pcs Truck Lego Set | eBay