How to make a skid steer mechanism step by step.
First you must place 4 gates, title WASD (Mod: WASD Converter).
Add four logic gates (position will be used later).
Make the gates XOR.
Add Your 4 engines and add the wheels. Make sure the wheels are on double bearings.
Connect the Engines to the yellow XOR gates.
Connect the wheels accordingly to the screenshot.
Youve succesfully made a skid steer mechanism.