Having problems with your Subaru Legacy ?

My 1998 subaru legacy transmission oil temperature light on dash will blink 16 times everytime i start the car. i too car to autozone to have the car scanned and it coded that the shift solenoid was faulty. my question is' 1) where are the solenoids located? 2)how can i tell myself which solenoid is bad since there may be multiple solenoids in the tranny? 3)can the solenoids be accessed by taking the fluid pan off the the tranny from the bottom and removing the solenoids from there? 4)can yo

Posted / edited by AnonymousUser on : 16-07-2018

Answers :

1. The solenoids are located inside the transmission.
\015\0122. Usually solenoid sets are replaced if tearing down the transmission to make sure the transmission does not fail later due to a marginal solenoid being left in there.
\015\0123. Some solenoids are accessible from behind the transmission oil pans. Some cars have side pans that reveal the solenoids.
\015\0124.
\015\012Hydraulic Control System\015\012The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
\015\012Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
\015\012On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
\015\012Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
\015\012The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.
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