LEGO MOC Lego Technic 9398 functional crawler alternative B model by Secon Yan | Rebrickable - Build with LEGO
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
LEGO Technic 9398 4x4 Crawler MOD | Nikolay Gamurar | Flickr