As shown here, ORD can supply a fully rebuilt 205 and Magnum bolted together and ready to go into your rig. Stephen says versatility in gearing choices is the real beauty of the Magnum and what sets it apart from the competition. Consider this: A Magnum behind an NV4500 gives you a whopping 20 different gear choices from 0.73:1 overdrive all the way down to 29.90:1. Assuming a differential ratio of 5.13:1, the final drive ratio is something like 153:1. Wowser.