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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.

wvicary Member

wvicary

Posted
Posted

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?

wvicary Member

wvicary

Posted
Posted

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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