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Old 06-06-2018, 10:35 AM   #1
Mini-Skoolie
 
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Rear Axle Gears

Local Shop selling used gears: based off my Vin has said mine are 5.13 and reccomend selling me a used set of gears of 4.33 for $500.00

Currently the bus is slow upper 50's and lower 60's at best. Would this be a good change, or is there a better ratio that people have found?

98 FS-65 Bluebird Cummins/Allison
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Old 06-06-2018, 11:15 AM   #2
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Originally Posted by Hazin View Post
Local Shop selling used gears: based off my Vin has said mine are 5.13 and reccomend selling me a used set of gears of 4.33 for $500.00

Currently the bus is slow upper 50's and lower 60's at best. Would this be a good change, or is there a better ratio that people have found?

98 FS-65 Bluebird Cummins/Allison
If you measure accurately how tall your rear tires are and know the gear ratios I can tell you what difference there will be in mph at same RPM.
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Old 06-06-2018, 11:29 AM   #3
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Transmission Ratio RPM Calculator | Spicer Parts
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Old 06-06-2018, 12:16 PM   #4
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Quote:
Originally Posted by Hazin View Post
Local Shop selling used gears: based off my Vin has said mine are 5.13 and reccomend selling me a used set of gears of 4.33 for $500.00

Currently the bus is slow upper 50's and lower 60's at best. Would this be a good change, or is there a better ratio that people have found?

98 FS-65 Bluebird Cummins/Allison
changing the gears will lower your rpm's. You'll get more top speed, unless its governed/limited.
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Old 06-06-2018, 01:53 PM   #5
Mini-Skoolie
 
Join Date: Jun 2018
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Didnt even think about a govenor on it. Ill have to look into that. Yeah im traveling mostly around the midwest so getting the top speed up a little bit would be quite nice going from iowa to ohio and back for example. 55 is rough
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