2020 Chevrolet Equinox Transmission & Axle Gear Ratios

Transmission gear ratios

The 2020 Chevrolet Equinox offered a few different transmission options, each matched to specific engine choices. Below are the internal gear ratios for each transmission.

Hydra-Matic 6T40 (6-speed automatic)

This transmission was typically paired with the 1.5L turbocharged engine.

Hydra-Matic 9T50 (9-speed automatic)

This transmission was typically paired with the 2.0L turbocharged engine.

Available axle ratios

The 2020 Chevrolet Equinox, being a front-wheel-drive (FWD) or all-wheel-drive (AWD) crossover, doesn't have a traditional "rear axle" in the same sense as a truck. Instead, it features transaxle ratios that are integrated within the transmission unit, or a power transfer unit (PTU) and rear drive unit (RDU) for AWD models, which effectively serve a similar purpose to an axle ratio in determining the final drive ratio. The specific final drive ratios are generally dictated by the transmission and engine combination.

Note: The RPO codes (GU6, GT4, GW3) are general representations and actual codes may vary or be part of a larger RPO package.

How to identify your axle ratio

For General Motors vehicles like the 2020 Chevrolet Equinox, the easiest way to identify your axle ratio, or more accurately, your final drive ratio, is by checking the Service Parts Identification Label, often referred to as the RPO (Regular Production Option) sticker. This sticker is typically found in one of the following locations:

• Inside the glove compartment
• On the driver's side door jamb
• Under the rear cargo area floor panel

Locate the sticker and look for three-character codes starting with "G." Common axle ratio codes to look for would be similar to those listed in the table above (e.g., GU6, GT4, GW3). Each code corresponds to a specific final drive ratio.

If the sticker is missing or unreadable, a Chevrolet dealership can provide you with a build sheet for your specific VIN, which will list all installed RPO codes.

Towing vs MPG impact

The final drive ratio plays a crucial role in balancing a vehicle's performance characteristics, specifically between towing capability and fuel economy.

• Numerically Lower Ratio (e.g., 3.17): A numerically lower final drive ratio means the engine will operate at lower RPMs at a given road speed. This generally translates to better fuel economy, especially during highway cruising, as the engine doesn't have to work as hard. However, it can reduce overall pulling power and acceleration, making it less ideal for heavy towing.

• Numerically Higher Ratio (e.g., 3.47): A numerically higher final drive ratio allows the engine to spin at higher RPMs at the same road speed. This increases torque delivery to the wheels, improving acceleration and providing greater towing capacity. The trade-off, however, is generally reduced fuel economy, as the engine is working harder and consuming more fuel, particularly at highway speeds.

For the 2020 Equinox, the 1.5L engine with the 3.17 ratio would offer the best MPG for FWD models, while the 2.0L engine with its higher final drive ratio (3.47) is better suited for those needing more acceleration and potential towing capability.

Common issues

While the 2020 Chevrolet Equinox generally boasts reliable powertrains, some issues can arise related to the transaxle and all-wheel-drive components:

• Bearing Noise: Over time, bearings within the transaxle or, in AWD models, the power transfer unit (PTU) or rear drive unit (RDU) can wear, leading to a whining or humming noise that changes with vehicle speed. This often indicates the need for inspection and potential replacement of the affected bearings.

• Fluid Leaks: Seals on the transaxle, PTU, or RDU can degrade over time, leading to fluid leaks. It's important to address these leaks promptly to prevent fluid starvation and potential damage to internal components.

• Limited-Slip Clutch Wear (AWD models): While not as pronounced in a crossover as in a performance vehicle, components within the AWD system can experience wear. If the AWD system feels like it's binding or not engaging correctly, it could be related to clutch pack wear or issues within the electronic control system.

Regular maintenance, including fluid checks and changes according to the manufacturer's schedule, can help mitigate these potential issues and prolong the life of your Equinox's drivetrain components.

Find a driveline shop on Repairius.