2020 Honda Civic Transmission & Axle Gear Ratios

Transmission gear ratios

The 2020 Honda Civic offers a few different transmission options, each with its own unique gear ratios designed to optimize performance and fuel efficiency for various driving conditions.

Continuously Variable Transmission (CVT)

Note: CVTs do not have fixed gears in the traditional sense, but rather a continuously changing ratio within the specified range.

6-Speed Manual Transmission (6MT)

Available axle ratios

Unlike many trucks or SUVs, passenger cars like the Honda Civic typically do not offer a wide range of axle ratios as a customizable option. The final drive ratio, which combines the transmission's output with the differential, is generally set by the factory to complement the engine and transmission combination for optimal everyday driving.

For the 2020 Honda Civic, the final drive ratios are largely dependent on the transmission and engine pairing.

How to identify your axle ratio

For most Honda Civic owners, finding an explicit "axle code" like on a truck's door jamb sticker is not a common practice because axle ratios are typically integrated with the transmission and engine selection. However, you can generally determine your Civic's final drive ratio by knowing your specific trim, engine, and transmission combination. The owner's manual or a Honda dealership will be able to provide the exact specifications for your vehicle.

If you need to verify, a VIN decoder can often provide detailed specifications, or a reputable Honda service center can look up the vehicle's build sheet based on the VIN.

Towing vs MPG impact

For a Honda Civic, towing is not a primary design consideration, and consequently, axle ratios are not optimized for heavy towing. The Civic is designed for fuel efficiency and spirited driving rather than hauling significant loads.

• Numerically lower ratio (e.g., 3.94): Generally results in better fuel economy as the engine operates at lower RPMs at cruising speeds. This is beneficial for highway driving.
• Numerically higher ratio (e.g., 4.10 or 4.11): Typically provides quicker acceleration and more torque to the wheels, which can be advantageous for performance-oriented driving. While theoretically better for towing a very light load, it will lead to higher engine RPMs at cruising speeds, thus reducing fuel economy.

Given the Civic's lightweight construction and typically small engine displacement, any towing should be restricted to very light loads, such as a small utility trailer or bicycle rack. Always consult your owner's manual for maximum towing capacity, which for a Civic is often quite limited or not recommended at all.

Common issues

Unlike heavy-duty vehicles with robust differentials, the Honda Civic's drivetrain is generally very reliable. Issues with the final drive (axle) are relatively uncommon. However, potential issues that could arise in any vehicle's differential, though rare in a Civic, include:

• Gear Whine: A persistent whining noise that changes with vehicle speed and often with acceleration or deceleration. This can indicate worn or improperly set up ring and pinion gears. This is more common after a repair if the gears are not properly "meshed."
• Carrier Bearing Wear: The bearings supporting the differential carrier can wear out, leading to humming or growling noises, especially heard from the rear of the vehicle (though Civics are front-wheel drive for most models, the differential is integrated into the transaxle).
• Limited-Slip Differential (LSD) Clutch Wear: For models equipped with an LSD (like the Civic Si or Type R), the clutch packs can wear over time, leading to a loss of their intended function (improved traction). This might manifest as uneven power delivery during aggressive cornering or a chattering noise from the differential when turning tightly at low speeds.

Should you experience any unusual noises or performance from your Civic's drivetrain, it's best to have it inspected by a qualified mechanic.

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