LEGO Technic 9398 4x4 Crawler MOD | Nikolay Gamurar | Flickr
LEGO TECHNIC: 4x4 Crawler (9398) | eBay
Made an upgrade of the 9398 with XL motors and gave it 30% more additional parts. This is my MK2 version as my first upgrade was not as successful. Also it uses
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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