2020 Tesla Model X — Transmission & Axle Gear Ratios

The 2020 Tesla Model X stands out as one of the most capable and technologically advanced all-electric SUVs on the market. Unlike traditional internal combustion engine (ICE) vehicles that rely on multi-speed automatic or manual transmissions and selectable rear differential ratios, the Model X utilizes a specialized electric vehicle (EV) powertrain. Instead of shifting through gears to keep an engine in its optimal power band, electric motors deliver 100% of their torque instantly. To manage this power, Tesla uses a fixed single-speed reduction gear system.

If you are researching the drivetrain specifications for your dual-motor Long Range or Performance model, here is your comprehensive guide to the 2020 Tesla Model X gear and axle ratios.

Transmission gear ratios

Because the 2020 Tesla Model X is fully electric, it does not have a traditional transmission with multiple forward gears and a dedicated reverse gear. Instead, both the front and rear electric motors are paired with their own single-speed reduction gearsets. Reverse is achieved simply by spinning the electric motors backward.

Below are the internal gear reduction ratios for the dual-motor setup (Long Range and Performance / "Raven" powertrain):

Note: The exact reduction ratio can vary slightly depending on the specific motor revision (induction vs. permanent magnet reluctance motors), but the front generally features a ~9.03:1 ratio and the rear a ~9.34:1 ratio.

Available axle ratios

In a traditional truck or SUV, you might choose between a 3.31, 3.55, 3.73, or 4.10 axle ratio depending on your towing needs. In the 2020 Tesla Model X, there are no selectable axle ratios or conventional differentials with ring and pinion gears in a solid axle. The "axle ratio" is effectively the single-speed reduction gear ratio built directly into the front and rear Drive Units.

How to identify your axle ratio

If you are coming from the world of GM, Ford, or Ram trucks, you are likely used to checking a door-jamb RPO sticker, an axle tag on the differential cover, or the glovebox for an axle code (like GU6 or GT4).

For the 2020 Tesla Model X, identifying your gearing is much simpler:

• No RPO Stickers: Tesla does not use RPO codes or traditional axle tags.
• Standardized Production: All 2020 Model X vehicles (Long Range and Performance) use the same dual-motor single-speed reduction gear setup. You do not need to hunt down a specific build code.
• VIN Decoder: You can run your VIN through a standard decoder to verify your exact trim (Long Range vs. Performance), which confirms you have the standard Raven drive units.
• Drive Unit Data Plate: If you need to replace a motor assembly, there is a stamped data plate directly on the aluminum casing of the front and rear drive units that lists the specific part number and revision letter for replacement purposes.

Towing vs MPG impact

In a conventional gas or diesel vehicle, a numerically lower ratio (like 3.31) provides better highway MPG at the expense of towing power, while a higher ratio (like 4.10) sacrifices fuel economy for better off-the-line towing grunt.

In the EV world, the dynamic is different:

• MPG / Range: The ~9:1 reduction gear is meticulously engineered by Tesla to balance high-speed efficiency (MPGe and total range) with low-speed acceleration. Because electric motors can spin upwards of 18,000 RPM, this deep reduction ratio allows the vehicle to reach highway speeds while keeping motor efficiency high.
• Towing: The 2020 Model X is rated to tow up to 5,000 lbs (when equipped with the factory tow package and 20-inch wheels). It doesn't need a "towing gear" because the electric motors generate maximum torque at 0 RPM. The deep 9.34:1 rear reduction gear provides immense torque multiplication, making pulling a trailer off the line effortless compared to a traditional SUV.

Common issues

While electric drive units lack the complex clutches and valve bodies of a traditional automatic transmission, they are not immune to driveline wear. If you own a 2020 Model X, keep an ear out for these common issues:

• Drive Unit Whine: A high-pitched milling or whining noise under acceleration can indicate premature wear of the reduction gears or internal bearings.
• Half-Shaft / CV Joint Clicking: The Model X (especially Performance models) is notorious for half-shaft wear. "Cheetah stance" launches or heavy acceleration at high ride heights puts extreme angles on the front CV joints, leading to a clicking or shuddering feeling under hard acceleration. This is technically a suspension/axle shaft issue rather than an internal drive unit failure, but it is highly common.
• Motor Coolant Leaks: Internal seals can occasionally fail, allowing coolant to mix with the drive unit lubrication, which can damage the internal bearings over time.

Need help diagnosing a drive unit whine or replacing worn CV axles on your Model X? Find a driveline shop on Repairius. Our network of certified EV technicians and powertrain specialists has the specialized tools and knowledge to get your vehicle back on the road.