Speedometer gear selection - Page 2 - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

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post #11 of (permalink) Old 01-07-2002, 02:32 PM
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Re: Speedometer gear selection

Use the following formula to find the number of teeth needed on your speedometer driven gear.
B = Miles traveled according to odometer
A = Actual miles traveled (per mile markers)
T = Number of teeth on driven gear used to calculate miles traveled

(B/A) * T = Number of teeth needed on driven gear (round off to nearest whole number)

Example: B = 100, A = 114, T = 29 (100/114) * 29 = 25.4 rounded to 25

When rounding decimals off: .50 or less round down, .51 or more round up.

Or, if you know you diff gears, go to: http://www.tommyjeep.com/apps/ratio/index.htm

You can buy the gears you need at your local Jeep or Dodge dealer, Rossers, Parts Mike, or many other off road dealers.

Later, Ken

83 CJ8, 4.0 HO/AW4, etc.
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