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 Crawler modified in 2023 | Crawlers, The originals, Monster trucks
LEGO MOC RC ☆ Βatman Tumbler LEGO 76240 UCS ☆ Motorized and remote controlled with power functions from LEGO 9398 Crawler ☆ Batmobile from the Dark Knight by reckless_glitch | Rebrickable - Build with LEGO
Первый Лего Техник блог: Exclusive review of 41999 4x4 Crawler Exclusive Edition (Englishversion)