2017 Chevrolet Malibu Transmission & Axle Gear Ratios

Transmission gear ratios

The 2017 Chevrolet Malibu was offered with a few different transmission options, depending on the engine and trim level. Each transmission features a unique set of internal gear ratios designed to optimize performance and fuel economy.

6-Speed Automatic Transmission (M5U)

This transmission was typically paired with the 1.5L Turbo I4 engine.

8-Speed Automatic Transmission (M5N)

This transmission was generally found with the 2.0L Turbo I4 engine.

Hybrid Electronic Continuously Variable Transmission (ECVT) (MKA)

This transmission is exclusive to the Malibu Hybrid model and works in conjunction with the electric motor and 1.8L I4 engine.

Available axle ratios

Unlike many trucks or SUVs, the 2017 Chevrolet Malibu, being a front-wheel-drive sedan, does not have traditional "axle ratios" in the same way. Instead, the final drive ratio is integrated into the transaxle. The listed ratios above are the final drive ratios for each transmission. There aren't different axle ratio options to choose from that would drastically alter the vehicle's characteristics.

How to identify your axle ratio

For the 2017 Chevrolet Malibu, the "axle ratio" is synonymous with the final drive ratio of the transaxle. To identify this, you'll typically look for the RPO (Regular Production Option) codes. These codes are usually found on a sticker in the glove compartment or on the driver's side door jamb. Look for codes like "GU-" followed by numbers (e.g., G80 for limited slip differential, though unlikely on a Malibu, but the final drive ratio may be explicitly listed or implied by the transmission and engine codes such as M5U or M5N).

If you have difficulty locating these codes, a Chevrolet dealership can provide you with a build sheet for your specific VIN, which will detail all factory options, including the transaxle type and its final drive ratio.

Towing vs MPG impact

For a vehicle like the 2017 Chevrolet Malibu, traditional "towing vs. MPG impact" related to different axle ratios is not as prominent as in rear-wheel-drive trucks or SUVs. Since the final drive ratio is fixed within the transaxle for each powertrain combination, you don't have the flexibility to choose a numerically higher ratio for better towing or a lower ratio for improved fuel economy.

Generally, a numerically lower final drive ratio (e.g., 2.73:1) would allow the engine to run at lower RPMs at a given road speed, potentially leading to better fuel economy on the highway. Conversely, a numerically higher final drive ratio (e.g., 3.73:1) would allow the engine to rev higher, providing more torque multiplication to the wheels, which could be beneficial for towing or quicker acceleration. However, the Malibu is not designed for significant towing duties, and its final drive ratios are optimized for a balance of performance and fuel efficiency in a sedan application.

Common issues

While axle issues are less common in front-wheel-drive vehicles compared to rear-wheel-drive trucks, some problems can arise within the transaxle or with associated components:

• Transaxle whine or hum: This can sometimes indicate wear in the internal gears or bearings within the transaxle, particularly the final drive assembly. It might become more noticeable at certain speeds or under acceleration/deceleration.

• CV joint wear: The constant velocity (CV) joints on the drive axles can wear out, especially if the protective boots are torn, allowing dirt and moisture in. Worn CV joints often manifest as a clicking or popping noise, particularly when turning.

• Transmission fluid leaks: Leaks from the transaxle seals (e.g., axle seals) can lead to low fluid levels, which can cause premature wear and damage to internal components.

Regular transmission fluid checks and maintenance according to Chevrolet's recommendations can help prevent many of these issues.

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