1. What is the 4x4 Gear Ratio?

The 4x4 gear ratio, or final drive ratio, is the product of the transmission ratio, transfer case ratio, and axle ratio. It determines how many times the engine turns for each revolution of the wheels, affecting torque and vehicle performance.

2. How Does the Calculator Work?

The calculator uses the gear ratio formula:

Where:

• \( Trans \) — Transmission gear ratio (dimensionless)
• \( Transfer \) — Transfer case ratio (dimensionless)
• \( Axle \) — Axle ratio (dimensionless)

Explanation: The final ratio represents the total gear reduction from the engine to the wheels in a 4x4 vehicle.

3. Importance of Gear Ratio Calculation

Details: The final gear ratio affects vehicle performance, fuel efficiency, and towing capacity. Proper ratio selection is crucial for optimal power delivery and drivetrain longevity.

4. Using the Calculator

Tips: Enter all three ratio values (must be positive numbers). The calculator will multiply them to give the final drive ratio.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical gear ratio range for 4x4 vehicles?
A: Common final ratios range from 30:1 to 100:1 for serious off-road vehicles, depending on intended use.

Q2: How does gear ratio affect crawling speed?
A: Higher ratios provide more torque and slower crawling speeds, ideal for technical off-road situations.

Q3: What's the difference between high and low range ratios?
A: Low range (typically 2:1 to 4:1) multiplies torque for off-road use, while high range (usually 1:1) is for normal driving.

Q4: Can I change my gear ratios?
A: Yes, but it requires changing transmission gears, transfer case gears, or axle gears - a complex modification.

Q5: How does tire size affect gear ratio?
A: Larger tires effectively decrease your final ratio, while smaller tires increase it. Re-gearing may be needed with significant tire size changes.