Calculators
Tire Height
Tire Height
RPM
RPM
Gear Ratio
Gear Ratio
Horsepower
Horsepower
Engine Displacement
Engine Displacement
Cubic Inches & Liters
Cubic Inches & Liters
Rod Ratio
Rod Ratio
Transmission Ratio RPM
Transmission Ratio RPM

Use the Diff Wizard to identify the exact part you need by year, make & model.
  • 24 Different vehicle makes
  • Hundreds of vehicle models
  • From 1948 to present day
  • Over 5,500 part numbers
  • 89 Product categories
  • 33 Product manufacturers
  • Over 130 differential types
Rod Ratio
Enter Rod Length and Stroke in Inches. Click "Solve" to get the Rod Ratio.

Rod Length Stroke   Rod Ratio