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I put 2 ton diffs in it, with brakes. Rear suspension is 20,000lbs of air. When I need the rubber I leave the H rated 19.5s on. When hotrodding around the 24s are just fine.
The frame is the weak link I guess now. But superduty frames are plenty tough.
It sports the exact Same 0.73 overdrive ratio as the G56 I was going to use. Is fully syncronized. Clutch brake. Range box. The works. I'll only probably be using 4-6-7-8-9 In daily driving. Or something like that. 1650ftlb input rating. Low range, 1st gear is 10.55:1. That could be fun.