2019 Tesla Model 3 Transmission & Axle Gear Ratios

<h2>Transmission gear ratios</h2>

Unlike traditional internal combustion engine vehicles, the 2019 Tesla Model 3 utilizes a single-speed direct drive transmission for each motor. This design simplifies the drivetrain significantly, eliminating the need for multiple gears and complex shifting mechanisms. The primary reduction occurs at the differential, which is integrated with the electric motor.

Here are the (effective) gear ratios for the 2019 Tesla Model 3:

Single-Speed Direct Drive

Gear	Ratio
Drive	9.00:1
Reverse	-9.00:1

This single ratio is a crucial part of the Model 3's efficient and responsive performance, providing instant torque delivery across its speed range without interruption from gear changes.

<h2>Available axle ratios</h2>

Since the Model 3 uses an integrated motor and differential, the "axle ratio" is effectively the final drive ratio within the motor assembly. All 2019 Tesla Model 3 variants share the same final drive ratio.

Ratio	Available With	RPO/Axle Code	Best For
9.00:1	All Trims (Standard Range, Standard Range Plus, Long Range, Performance)	N/A	Balanced performance, efficiency

Tesla does not offer different axle ratios for the Model 3, as the powertrain is optimized for a single, versatile ratio that provides a balance of acceleration and efficiency.

<h2>How to identify your axle ratio</h2>

For the 2019 Tesla Model 3, identifying your "axle ratio" is straightforward: it's always 9.00:1. Tesla vehicles do not use traditional RPO (Regular Production Option) codes on door jamb stickers for axle ratios, nor do they have separate axle tags like conventional ICE vehicles. The final drive ratio is an inherent part of the motor and gearbox assembly.

If you need specific information, your owner's manual or a Tesla service center can confirm the specifications of your vehicle.

<h2>Towing vs MPG impact</h2>

While the concept of "MPG" (miles per gallon) doesn't directly apply to electric vehicles, the equivalent measure is energy consumption, often expressed in Wh/mile (watt-hours per mile) or miles per kWh. A numerically lower axle ratio in an ICE vehicle typically results in better fuel economy, while a higher ratio provides more torque for towing or acceleration.

For the Tesla Model 3, the fixed 9.00:1 final drive ratio is engineered to provide an optimal balance. It delivers brisk acceleration characteristic of Tesla vehicles while maintaining excellent energy efficiency for its class. Since the Model 3 is not officially rated for towing in North America, the impact of axle ratios on towing is not a primary design consideration. The chosen ratio is a blend of performance and range optimization.

<h2>Common issues</h2>

Given the Model 3's electric powertrain and single-speed transmission, many common issues associated with traditional multi-gear transmissions and differentials are not applicable. There are no shifting solenoids, clutch packs, or ring and pinion gears in the conventional sense to wear out or whine.

However, electric vehicle drivetrains can still experience issues, albeit different ones:

• Motor or Drivetrain Noise: While generally quiet, some owners might notice unusual whirring or humming noises from the motor or reduction gear assembly. This could indicate a bearing issue or other internal component wear. This is less common and typically covered under warranty.
• Half-Shaft/CV Joint Wear: Like any vehicle, the half-shafts (drive axles) connecting the motor to the wheels can experience wear, especially at the constant velocity (CV) joints. Symptoms include clicking noises during turns or acceleration.

These issues are generally less frequent than those found in complex multi-speed transmissions and conventional differentials.

Find a driveline shop on Repairius.