An incorrect automatic transmission (AT) gear ratio means that the gear ratio between the transmission input and output shafts is not the desired or required value. This can lead to performance issues such as:
*Power Reduction: An incorrect gear ratio can result in a loss of power to the wheels, which reduces acceleration and traction.
* Increased fuel consumption: A gear ratio that is too high or too low can cause the engine to operate at higher or lower speeds, respectively, resulting in increased fuel consumption.
* Strange shift behavior: An incorrect gear ratio can cause the transmission to shift into the wrong gears or not shift at all.
*Transmission Damage: If the gear ratio deviates significantly from the desired value, it can cause excessive stress and wear on transmission components.
An incorrect gear ratio can be caused by a variety of reasons, including:
* Installation of unsuitable final drive
* Worn or damaged gears
*Transmission control module (TCM) problems
* Incorrect transmission software setup
It takes a professional transmission mechanic to diagnose and fix an incorrect gear ratio. They should check the gear ratios, inspect the transmission components, and reprogram the TCM if necessary.