Front View	This design is an independently suspended driven axle built of old parts (the Expert Builder version). I developed this back in the late 80's. They key piece used is the 2x2 plate turntable. 4 are required.
Back View	It's not quite as strong as I'd like it, but it will work. The key piece (the 2x2 plate turntable) creates a weak link. If the wheels are subject to too much load, the model will come apart at the turntables. The total width is quite large at 28 brick units. The inside-to-inside tire distance is just over 26 brick units. The large width is a result of having to use 4 u-joints (two between the differential and wheel on both sides).
Front View, Minus Tires	The steering link was the most difficult part to develop. The end result functioned somewhat but was weak. If the wheels are loaded too much from forward loads (i.e. driving quickly over a bump) the steering link arms will pull apart. They are just 6L axles with simple connectors at the ends.
Back View	The steering axle fits through the red frame . It is seen in the picture hanging down loosely (it has 2 u-joints). The drive shaft connects easily to the red frame (look at the gray 1x8 Technic beam).
Front View, Steering Assembly Removed	Rubber bands were used instead of shocks. This provided a smooth suspension, but it had too much travel. The bottom of the frame would hit the ground before the suspension reached its highest position.
Side View, Steering Assembly Removed	ADVANTAGES: uses common parts DISADVANTAGES: only large tires (24x43) will work, very low ground clearance, weak structure, steering pivot point is VERY far from tire contact point
Rear Wheel Indep. Susp.	This complements the above steerable wheel. It is a simple driven wheen (no steering) with independent suspension. I only built half of it, but you can see the concept.
Rear Wheel Indep. Susp. View 2	This is very similar to the steerable wheel assembly, but it's a lot smaller in depth and stronger.