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You can drive all day at 50 mph if you don't die of boredom ;-)
Chances are very good that your bus has an Eaton rear axle, for which new gears are commonly available in a variety of ratios. Is it gas or diesel? Auto or manual? If you could put like a 6 speed Allison trans in there that would be better than doing the two speed, however if its a stick shift then the two speed is the way to go. If you are mechanically inclined you could get you a ring and pinion set, an instruction manual and a big torque wrench and do it yourself. Medium duty truck stuff is surprisingly easy to work on.
I have a 1965 Chevy C-60 school bus with a Carpenter coach and a Cadillac 500 V8 which will flatten any grade up to 7 percent, no problem. Except its got a 6.2:1 rear axle (low range 8.4:1) and buzzes the big V8 pretty good at 65mph. If I had the 5.8:1 ratio I'd gain a good 5 mph. Plus, I'd gain a few more miles between fuel stops ;-) |
RV and bus conversion info since 1996.
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