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Gear Ratio / Engine RPM Calculator
Under/Overdrive: (Aftermarket Only)
*
Transmission: 1st Enter all values
2nd on this form in
3rd whole or decimal
4th format only -
5th no percentages.
6th  
Reverse  
*
 
Transfer Case: High
Low
*
Differential Gear:
Transmissions:
C4
C6
C6 Wide Ratio
Ford 3.03
Ford 3.03 Wide Ratio
Warner T-18 4 spd
NP435
Final Drive Only
reset

Transfer Case:
NP203
NP205
2 Wheel Drive

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