Are you looking for an easy way to get more out of your automatic transmission? If so, then this blog post is for you! We’ll discuss the basics of how to adjust shift points in your automatic transmission, as well as some tips and tricks to help you get the most out of this modification.
Understanding Shift Points in Automatic Transmissions
Understanding shift points in automatic transmissions is important for achieving the most efficient and optimal performance. Shift points are the RPMs at which an automatic transmission shifts gears. On most older Mercedes, a Bowden cable can be used to adjust the internal control, while modern transmissions have a variety of methods for making adjustments. It’s important to note that the optimal shift point is defined as the flywheel RPM for which the difference in transmission output torques between two gears is near zero for the same modulator pressure. This pressure varies according to throttle opening, and it’s important to know how to adjust the shift points properly in order to avoid potential damage to the Bowden cable.
Calculating Down-Shift RPM Points
Calculating down-shift RPM points is essential for getting the most out of your automatic transmission. To do this, you need to know the ratio of each gear in the transmission. With the ratios in hand, you can then break down the dyno sheets for each car to get a good sense of what the optimal down-shift RPM points will be. For example, if you want to end up at a certain RPM when you shift into a lower gear, you would use the ratio and the current RPM to calculate the target RPM. Remember that there is not much point in shifting into a lower gear if it will cause your RPMs to drop too low and you won’t have enough power to accelerate.
Adjusting the Shift Point with a Bowden Cable
Adjusting the shift points with a Bowden cable is a common and straightforward procedure for many older Mercedes models. Start by making small half-turn adjustments to the cable and get a feel for how much a full turn affects the shift point. It’s important to note that the modulator only adjusts the firmness of the shifts, while the Bowden cable determines the shift point. To lengthen it, you can turn the adjustment “T” clockwise. This will increase the shift point and soften the shift. For cars with an A 28 automatic transmission, this procedure should always be followed when adjusting the shift points.
Adjusting Shift Points with Modern Automatic Transmissions
Modern automatic transmissions are equipped with sophisticated electronics that allow the driver to adjust the shift points and degree of shifting firmness. Depending on the vehicle, different methods may be used to adjust the shift points. Some vehicles have an increase or decrease button or knob that can be used to adjust the shift points. Others may have a Bowden cable that can be adjusted manually. However, it is important to note that adjusting the shift points on a modern automatic transmission requires a great deal of experience and caution. If done incorrectly, it can cause damage to the transmission or drivetrain. It is best to consult a professional mechanic before attempting to make any adjustments.
Using the Increase or Decrease Button
For those who have a modern automatic transmission, you can adjust the shift points with the increase or decrease button. This button is usually located on the shift lever of the car. By pressing this button, you can increase or decrease the engine speed and rpm together in small intervals. This is helpful for increasing the power of your car by adjusting the shift points for a more optimal experience. However, make sure that you don’t damage the Bowden cable in the process.
Avoiding Damage to the Bowden Cable
It is important to be careful when adjusting the bowden cable, as it can easily become damaged. To avoid any damage, make sure to keep the end of the cable lined up with the selector lever and ensure that it is properly secured in its place. Additionally, ensure that you are using the correct type of cable for your type of transmission, as using the wrong type can cause damage as well.
Understanding Optimal Shift Point
Understanding optimal shift points is key for getting the most out of your automatic transmission. The theoretical ideal shift point is when the power in the current gear equals the power the engine will make after shifting up gear. This means the optimal shift points will be redline in each gear. However, this is a bit simplistic and assumes a fairly regular torque curve, which isn’t always the case. To get the best results you should use a dyno graph to find the optimal shift points for maximum acceleration. If you have an aftermarket transmission you can also set up manual shift points or divide the car’s max RPMs by the number of gears to get a good starting point.
Adjusting Shift Points with Jscan, AlfaOBD, Tazer, or Dealer
If you have a more modern vehicle, then you can use Jscan, AlfaOBD, Tazer, or a Dealer to adjust the shift points on your automatic transmission. This is done by changing the tire size in the truck’s computer, which can help the transmission adjust the shift points to match the tires. It is important to note that while the Tazer can be used to adjust some settings on the Jeep JL, it cannot be used to adjust shift points. If you have a Jeep JL, then you will need to reset the learning adaptive shift points in order to get the proper gear shifting. You can also try using the Increase or Decrease button on your automatic transmission to adjust the shift points. However, it is important to be aware of potential damage to the Bowden cable if this method is used.
Using Gas Pedal to Downshift
Knowing when and how to downshift is essential to driving an automatic transmission vehicle. One way to adjust the shift points is by using the gas pedal. You can adjust them by pushing on the gas pedal more or less; this will increase or decrease the shift rpm. When approaching a situation where you’d like to downshift, ease off the gas pedal and let your car slow down a bit before pressing it again. Using the clutch to slow down works in tandem with the accelerator pedal, so be sure to be careful when adjusting your shift points. It’s important to note that prolonged driving with high engine speed could cause vehicle damage, so be sure to keep that in mind as you adjust your downshift.
Adapting Shifting of Gears with Automatic Transmission Control System
Modern automatic transmissions are equipped with a control system, such as Active Adaptive Shift Control (AAS), that can adjust the shift points automatically. This allows the transmission to shift more smoothly and maintain a comfortable experience for drivers. It also helps to reduce wear and tear on the transmission components. Additionally, vehicles can be equipped with shift controls like Jscan, AlfaOBD, Tazer, or Dealer which can be used to adjust the shift points for optimal performance. Drivers can also use their gas pedal to downshift and further adapt their shifting experience.