Question about 1999 Jeep Grand Cherokee
This is possible, to check the valve by going under your jeep and looking at the back part of the transmission. You will see a valve with a vacuum line going to it, it is usually located at rear of trans just above trans pan. To check pull vacuum line off, if fluid comes out the valve is bad and needs to be replaced. They can be purchased at most auto parts stores readily. If no fluid the trans may just need serviced.
Posted on Oct 05, 2009
If shifting is slow, then the problem is often related to throttle position detection.
Throttle position is detected by the TPS (throttle position sensor).
TPS is located on the throttle body.
Input from TPS is used by TCM (transmission control module) to determine when to send the impulse to transmission shift solenoid.
If high gear does not switch at all, then can also be a defective shift solenoid.
The transmission switch solenoid located inside the trasmission, in the valve body.
The throttle position sensor must replaced. If the problem is still there, check the transmission switch solenoids and valve body, and the TCM.
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
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