2023 Subaru Crosstrek Transmission & Axle Gear Ratios

Transmission gear ratios

The 2023 Subaru Crosstrek is available with two transmission options: a 6-speed manual transmission and a Lineartronic CVT (Continuously Variable Transmission).

6-Speed Manual Transmission

Lineartronic CVT

Available axle ratios

The 2023 Subaru Crosstrek offers different axle ratios depending on the transmission and trim level. Note that Subaru refers to this as the "final drive ratio."

How to identify your axle ratio

Unlike some other manufacturers, Subaru does not typically use RPO codes on door jamb stickers or axle tags for easy identification of the final drive ratio. For the 2023 Crosstrek, the axle ratio is primarily determined by the transmission type. The 6-speed manual models will have a 3.700 final drive ratio, while CVT models will have a 3.900 final drive ratio. If you need to confirm, your owner's manual or a Subaru dealership can provide specific details based on your VIN.

Towing vs MPG impact

Understanding the relationship between axle ratio, towing, and fuel economy is crucial for any vehicle owner. In simple terms:

• Numerically Lower Ratio (e.g., 3.700): A numerically lower axle ratio means the engine turns fewer revolutions for each rotation of the wheels. This generally results in better fuel economy because the engine is operating at lower RPMs at a given speed. However, it also means less mechanical advantage for towing or accelerating heavy loads.

• Numerically Higher Ratio (e.g., 3.900): A numerically higher axle ratio means the engine turns more revolutions for each rotation of the wheels. This provides greater mechanical advantage, making it easier for the vehicle to accelerate and tow heavier loads. The trade-off is typically lower fuel economy due to the engine operating at higher RPMs.

For the 2023 Subaru Crosstrek, the difference between the 3.700 (manual) and 3.900 (CVT) ratios is relatively small, indicating a balance across the lineup. The CVT's ability to continuously vary its gear ratios allows it to optimize for both efficiency and power delivery, making the 3.900 ratio a suitable match.

Common issues

Subaru drivetrains are generally robust. However, like any mechanical system, certain components can experience wear over time.

• Ring & Pinion Whine: If you hear a whining noise that changes with vehicle speed (not engine RPM) and gets louder under acceleration or deceleration, it could indicate wear in the ring and pinion gears within the differential. This is often due to improper setup, lack of lubrication, or heavy use.

• Carrier Bearing Wear: The carrier bearings support the differential case. Worn carrier bearings can produce a low-frequency hum or growl that changes with vehicle speed. Early detection and replacement are important to prevent further damage.

• Limited-Slip Clutch Wear (if equipped): Some Subaru models with certain AWD systems might incorporate clutch-type limited-slip differentials. Over time, the clutch packs can wear out, leading to a loss of limited-slip function and potentially clunking noises during turns. The 2023 Crosstrek primarily uses an electronically controlled multi-plate transfer clutch for its AWD, which typically has different wear characteristics than traditional mechanical limited-slip differentials.

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