The transmission control solenoid communicates to a car when it is time to shift gears, if the car has an automatic transmission. If the shifting in the car's engine is balky or has other problems, the issue is likely an error with the control solenoid. Because a fairly sophisticated measurement of hydraulic pressure is necessary to operate the transmission, a solenoid that loses sensitivity to this factor is headed for repair or replacement.Continue Reading
Even with modern electronics governing transmissions, the operating principles that they follow are still mainly hydraulic, requiring a more precise control on the pressure. Older designs for automatic transmissions just use one line with a pressure control solenoid, adjusting pressure throughout the whole transmission. Newer designs require multiple pressure control solenoids, sometimes permitting the solenoids to apply exact pressure controls. It is the shift pressure that affects shift quality; if there is too much pressure, the shifting gets rough, but if there is not enough pressure, the clutches overheat.
If the shifting shows signs of problems, take the car to a certified mechanic to have the troubleshooting codes of the engine checked. Often that is the only clear sign of a problem until the power steering simply gives out, so be proactive. Regular maintenance and inspection can aid in the early detection of mechanical issues and save money on potential repairs.Learn more about Transmission
Transmission shift sensors are a piece in a car's engine that gauges the status of the transmission and relays this information to the transmission control module. Based on how the shift sensor outputs, the automatic transmission system determines whether or not to shift gears.Full Answer >
The common symptoms of an onboard diagnostic code P0700 transmission control system malfunction include illumination of the check engine light, decreased fuel economy and difficulty shifting. In rare cases, the issue causes no symptoms, other than illuminating the check engine light. Some drivers note vehicle performance problems such as the vehicle dying when it comes to a stop after driving at highway speeds.Full Answer >
The symptoms of transmission problems in Chevrolet vehicles can include unusual noises when shifting, inability to shift to or from specific gears and hesitation when shifting in automatic transmissions. Chevrolet has also recalled several models of vehicles for specific problems related to the transmission that may not have obvious symptoms.Full Answer >
The chief advantage of a five-speed manual transmission over a transmission with four or fewer gears is the presence of the additional gear ratio in the five-speed transmission gives the driver more options to match gear selection to current driving conditions. Five-speed manual transmissions can also achieve better fuel economy than other transmission types, though the efficiency advantage of manual transmissions over modern automatics is not as pronounced as it once was.Full Answer >