I don’t think that the “differential gears” are doing anything in here. Are they just decorational?

@LiamW I agree, as nice as it looks, 1,100 parts doesn't leave much space for an actual SUV on top

It's great but you forgot something that just about everyone forgets. When suspension is in the builder, it is at maximum extension. You've built it so that where the optimum ride height should be is where you've set maximum extension. The vehicle will ride too low, have short travel and very poor traction. As a general rule, the suspension should be 20% below the desired ride height when in the builder. That way the suspension will sag into position and be soft enough to absorb small bumps but still have enough travel to handle large bumps. That said, you did a nice job with the mechanics and detail. Perhaps too much detail...