Does the odometer reset with a new transmission

In most cases, the odometer does not reset with a new transmission. Here's why:

1. Odometer is tied to the vehicle's VIN: The odometer reading is linked to the vehicle's Vehicle Identification Number (VIN). When a new transmission is installed, the VIN remains the same, so the odometer reading is not affected.
2. Transmission replacement doesn't change the odometer's mechanical connection: The odometer is connected to the vehicle's speedometer and is driven by the transmission's output shaft. When a new transmission is installed, the odometer's mechanical connection remains the same, so it continues to record the vehicle's mileage.
3. Most modern vehicles have electronic odometers: Many modern vehicles have electronic odometers that are connected to the vehicle's onboard computer (ECU). The ECU receives data from various sensors, including the speedometer, and updates the odometer reading accordingly. When a new transmission is installed, the ECU is not affected, and the odometer reading remains unchanged.

However, there are some exceptions:

1. Some older vehicles with mechanical odometers: If your vehicle has a mechanical odometer (not electronic), it might be possible to reset the odometer when a new transmission is installed. This would require physically resetting the odometer mechanism, which is not a common practice.
2. Special circumstances: In rare cases, a transmission replacement might involve a significant change to the vehicle's drivetrain or chassis, which could potentially reset the odometer. For example, if the vehicle's frame or chassis is replaced, the odometer might be reset to zero.

In summary, unless you have a very old vehicle with a mechanical odometer or a rare circumstance involving a significant change to the vehicle's drivetrain or chassis, the odometer will not reset with a new transmission.