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964 shift solenoid testing

dr914jr

By dr914jr
in 964 Series

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dr914jr Member

dr914jr

Posted
Posted

Ok, I'm going to throw out a serious hail marry here. Does anyone know the resistance values and or testing procedures for the solenoids in a 1990 964 tip? I have a car here that will shift into no forward gears. Reverse is fine, but as soon as you get into a froward gear, the car won't move. Any thoughts would be greatly appreciated.

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wvicary Member

wvicary

Posted
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If you have a electrical failure in the valve body it should default to 3rd gear which is the limp home mode so you should still have a forward gear. I'd more inclined to think you have suffered a mechanical failure such as a broken sealing ring for hydraulic pressure in the front clutch pack. Did this happen suddenly or slowly over time? Are there any fault codes in the system?

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wvicary Member

wvicary

Posted
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If there was an electrical fault with the solenoids or interconnecting wiring such as the internal ribbon cable you would have a fault code. I don't think its an electrical fault but mechanical which is going to need to have the gear box torn down and inspected.

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