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Old 08-21-2016, 07:26 AM   #51
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Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 5,802
Year: 1992
Coachwork: Ward/AmTran
Chassis: International
Engine: dt466
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Originally Posted by CaptainHooligan View Post
What's good gearing for a bus? To get 68-70 mph?
4.44 or higher.
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Old 08-21-2016, 10:57 AM   #52
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Join Date: Mar 2011
Location: Houston, Texas
Posts: 4,341
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Getting the axle gearing to accomplish your speed requirements involves a number of considerations that really need to be worked out before jumping off. Re-gearing is not cheap and getting it wrong can be even more costly.

You need to take into account your engines preferred highway RPM (also known as its' "sweet spot")...your tire size...your final drive ratio coming off the tranny...and knowing if your motor will indeed pull higher gears.

Good news is there are a number of online calculators that will do most of the work once you have the correct numbers.

There are several below. I used the "Transmission Final Gear Ratio Manual Entry " on the one below to sort out mine...

Engine RPM Calculator
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Old 08-25-2016, 12:15 PM   #53
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Join Date: Aug 2016
Location: Panhandle FL
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Year: 1990
Coachwork: Wayne Corp
Engine: DT360
Rated Cap: 72
Originally Posted by somewhereinusa View Post
Where might one purchase such things, are they available in small quantities, brand name for Teflon gel?

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1990 International 3800 DT360 and AT545.
2007 Dodge 5.9 with a 6 speed.
6 Kids,1 Cool Ol Lady
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