One of the areas I looked at for redrive gears is the wheel gearset in the HUMVEE. 
The wheels on the original hummer is offset
truck style. The ratio was a 2.24:1. The entire upright over the counter 
price was $900.00. This included the seals and bearings
plus the end carrier and stub axle. This might be an acceptable gear set, 
but would require a complete spur gear housing, not a
trivial task. I doubt that this gearset would be as good as the 
one manufactured for Powersport, or Tracy's [Ford planetary] but it does offer
possibilities.
                                                          Bill Jepson

 
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