LEGO MOC suspension/steering without any special parts by daduchiko@gmail.com | Rebrickable - Build with LEGO
Lego steeringsystem 4x4 PF building instructions - YouTube
Steering design needed for unusual 4WD 4 wheel steering chassis - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Idk if this is accepted on this sub, but there is a ton of technic underneath, namely rear suspension, front pendular axle, remote controlled drive and steering (with working fake engine and