Any transmission is difficult to diagnose, however, there are differences between an automatic transmission and a manual transmission. The automatic in particular uses three different systems internally that work together, allowing the car to shift smoothly and automatically. When there are issues with these systems and the internal parts, you may experience problems with the transmission shifting gears easily.
How an Automatic Transmission Shifts
There are three systems in an automatic transmission that work together for it to run correctly. These include the electrical, hydraulic, and mechanical systems. The transmission gets its signals to function properly from the Electronic Control Module. The ECM is the vehicle’s internal computer that helps shift the gears automatically.
The electronic sensors inside the transmission monitor the gear selection, speed, and throttle position. This includes a Control Module that adjusts the current provided to solenoids inside to control the gears. The hydraulic system is used to select gears dependent on the transmission fluid’s pressure applied. The mechanical system primarily helps with power at high speeds. In general, the automatic transmission reduces higher engine speed to the slower wheel speed so the torque increases while shifting to provide a smooth drive.
Is Your Automatic Transmission Working Correctly?
There are actions that work together to make your automatic transmission function the way it is supposed to. The ECM must be working right so that all signals sent from the computer allow for the vehicle to perform and shift effortlessly. If that signal coming from the Electronic Control Module is running good, then the appropriate hydraulic pressure will be given so the components of the transmission run as well.
All of these components that work internally to achieve a smooth shift must be in a mechanically sound working condition. There are some warning signs to look out for, which show if these components are not working and you may need a transmission repair. The following signs point to a failing automatic transmission:
- If the transmission fluid is low or dark
- You hear whining and loud grinding noises
- The gears do not shift from one to the other easily
- Or your car jerks while changing gears
If any of these are happening with your car, get it to a transmission repair mechanic as soon as possible.
Issues with the Transmission
One main reason why the automatic transmission in your car may not be shifting smoothly is the ECM is going bad. It is best to get this checked out by an experienced auto mechanic technician who understands the electrical system. Other indicators include bad connections within, or worn out sensors and faulty solenoids. All of these lead to what is called a “no shift” condition, making the transition between gears difficult or shifting gears impossible.
This can be dangerous for an automatic transmission to experience these conditions while driving. Make sure to check a few parts if this begins to happen. You can look in the engine for worn, damaged or disconnected wiring, as well as blown fuses. Also, have a scan done at an auto repair shop if the check engine light comes for issues with the sensors. As always, make sure to check the level and state of the car’s transmission fluid according to your factory recommended maintenance schedule.
Visit a nearby AAMCO Minnesota location if your vehicle is having trouble shifting gears. You may need a Transmission Repair service on your car, so make sure to Schedule an Appointment as soon as possible before the automatic transmission goes out on you completely.