2020 Ford Ranger Transmission & Axle Gear Ratios

This guide provides detailed information on the transmission and axle gear ratios for the 2020 Ford Ranger, helping owners and enthusiasts understand their vehicle's drivetrain characteristics.

Transmission gear ratios

The 2020 Ford Ranger is exclusively equipped with a 10-speed automatic transmission across all trims.

Available axle ratios

The 2020 Ford Ranger offers several axle ratios to cater to different needs, from fuel efficiency to enhanced towing capabilities.

It's important to note that the 4.10 axle ratio is often paired with the FX4 Off-Road Package and is primarily available for those seeking maximum off-road capability and towing performance.

How to identify your axle ratio

For the 2020 Ford Ranger, you can typically identify your axle ratio using the RPO (Regular Production Option) code found on the door-jamb sticker, usually on the driver's side door. Look for a label that lists "AXLE" or "AXLE CODE."

• Door-jamb RPO sticker: The sticker will have a two-character code next to "AXLE." For example, "R9" might indicate a 3.73 open differential 2WD, while "L8" could mean a 3.73 electronic-locking differential 4x4. The 4.10 axle ratio, especially with the FX4 package, will have specific two-character codes as well.
• VIN Decoder: A Ford VIN decoder can often provide detailed build information, including the axle ratio, though it might not always explicitly state the ratio but rather the package it came with.
• Axle Tag (less common on newer vehicles): Older vehicles sometimes had a metal tag bolted to one of the differential cover bolts. While less common on newer Rangers, it's worth a quick check if other methods prove inconclusive.

Towing vs MPG impact

The choice of axle ratio significantly impacts both towing capability and fuel economy:

• Numerically Lower Ratio (e.g., 3.73): A numerically lower axle ratio means the engine spins fewer times for each rotation of the wheels. This generally results in better fuel economy on the highway, as the engine operates at lower RPMs. However, it provides less mechanical advantage for towing, meaning the engine will work harder and potentially consume more fuel when pulling heavy loads.
• Numerically Higher Ratio (e.g., 4.10): A numerically higher axle ratio means the engine spins more times for each rotation of the wheels. This provides greater mechanical advantage, making it easier to accelerate and tow heavy loads. The trade-off is typically reduced fuel economy, especially at highway speeds, as the engine operates at higher RPMs.

For the 2020 Ford Ranger, if your primary use involves frequent heavy towing or serious off-roading, the 4.10 axle ratio is generally preferred. If daily commuting and light hauling are your main concerns, the 3.73 ratio will offer a better balance of performance and fuel efficiency.

Common issues

While the 2020 Ford Ranger is generally robust, specific to the drivetrain components, some common issues can include:

• Ring and Pinion Whine: A high-pitched whine that changes with vehicle speed (not engine RPM) can indicate wear on the ring and pinion gears. This is often exacerbated by improper break-in procedures or heavy towing without adequate lubrication.
• Carrier Bearing Wear: The carrier bearings support the differential carrier within the axle housing. Worn bearings can lead to a humming or growling noise, especially at certain speeds. This can be more pronounced with heavier loads or aggressive driving.
• Limited-Slip Clutch Wear (if applicable): If your Ranger is equipped with a limited-slip differential (which the electronic-locking differential essentially emulates when engaged), wear on the clutch packs can lead to chattering or clunking noises during turns. Proper fluid changes with the correct friction modifier are crucial.

Regular differential fluid changes and inspections are critical for prolonging the life of your axle components.

Find a driveline shop on Repairius.