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Final Gear Ratio Formula:
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The Final Gear Ratio is the overall gear reduction between the engine and the wheels. It is calculated by multiplying the transmission gear ratio by the axle ratio, determining the vehicle's acceleration characteristics and top speed capabilities.
The calculator uses the Final Gear Ratio formula:
Where:
Explanation: The formula calculates the total gear reduction from the engine to the wheels, combining both transmission and differential gearing.
Details: The final gear ratio significantly impacts vehicle performance. Lower ratios provide better acceleration and towing capacity, while higher ratios improve fuel efficiency and top speed.
Tips: Enter both transmission gear ratio and axle ratio as positive numbers. Values must be greater than zero for accurate calculation.
Q1: What is a typical range for transmission gear ratios?
A: Transmission gear ratios typically range from 2.5:1 to 4.5:1 for first gear, with overdrive gears often below 1:1.
Q2: How does axle ratio affect vehicle performance?
A: Higher axle ratios (e.g., 4.10:1) provide better acceleration but lower top speed, while lower ratios (e.g., 2.73:1) offer better fuel economy but slower acceleration.
Q3: Can I change my vehicle's final drive ratio?
A: Yes, by changing either the transmission gears or the differential gears, though differential changes are more common for modifying final drive ratio.
Q4: How does final gear ratio affect towing capacity?
A: Higher numerical gear ratios provide more torque multiplication, improving towing capacity and hill-climbing ability.
Q5: What's the difference between individual gear ratios and final drive ratio?
A: Individual gear ratios are specific to each transmission gear, while final drive ratio represents the total reduction from engine to wheels in a particular gear.