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Unread 01-25-2012   #1 (permalink)
NatedoggAZ is offline Rookie


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Default Transmission Solenoid replacement?

Hello, (new to the forum)

1998 GT (convertible)
Automatic
Not sure what transmission number
Daily driver

Having a few issues with shifting - thought it may be a solenoid or needs the filter cleaned? Should this be where I should first look into replacing?

Looked up the solenoid parts and found 2 solenoids:
•Shift Control Solenoid
•Torque Converter Clutch Solenoid

Does anyone know what these solenoids are used for?

Where are these located and can a semi-mechanically competent (non professional) person change them out?

If someone has a diagram on where these are located and some instructions, I believe I can accomplish changing them out.

Thank you!

ND
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Unread 01-25-2012   #2 (permalink)
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what are you calling a "few issues with shifting"?
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Unread 01-25-2012   #3 (permalink)
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You also have three solenoids on your car.

1. Shift Solenoid
2. Torque Converter Clutch (TCC) Solenoid
3. Electric Pressure Control (EPC) Solenoid

1. Shift Solenoid Assembly, Shift Control Solenoids 1 and 2
Two ON/OFF shift solenoids are used for electronic shift scheduling. One unit containing the two shift solenoids is located in the main control valve body. The shift solenoids are two- way, normally closed style. Shift solenoids (SS-1 and SS-2) provide gear selection of first through fourth gears by controlling the pressure to the three shift valves.

2. Torque Converter Clutch (TCC) Solenoid
The torque converter clutch solenoid is used to control the apply and release of the torque converter clutch.

3. Electronic Pressure Control (EPC) Solenoid
The electronic pressure control (EPC) solenoid regulates transmission EPC pressure. EPC valve pressure is used to control line pressure.
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Unread 01-26-2012   #4 (permalink)
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Thank you very much for that information on the solenoids!

I hope my issue is an easy fix by replacing one of these. Here is the issue explanation:

When driving down the road at slower speeds 25-45MPH or so, if I slow down from those speeds and then hit the gas to go faster again (like coming up to a stop light, but then it turns green right before you get there, so you hit the gas again without totally stopping) there is a "CLUNK" heard and felt when this shifting occurs...

Hopefully this is some electrical issue...

Thanks!

ND
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