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[Oh]

Solenoids are accessible once the transmission fluid sump pan is removed.   

This might be a silly question.....

Why do you need to get to the solenoids to measure their resistance? isn't there a multiplug beteen the tranny and the ECU where you can measure the resistances?

Please do go on! I would really appreciate it.

[Andy H]

I don't know the answer but I feel certain that the wiring inside the transmission will run straight out to a multiplug where you should be able to measure the resistances (if you can access it and if you know which pin is which)

Have you seen the articles in this maintenance thread? 4L30E transmission

The second one (by a US based transmission specialist) looks particularly informative.

[Kneepad]

Solenoids are accessible once the transmission fluid sump pan is removed.   

This might be a silly question.....

Why do you need to get to the solenoids to measure their resistance? isn't there a multiplug beteen the tranny and the ECU where you can measure the resistances?

Apologies if this seemed misleading, but was only pointing out to Oh how to gain access to the solenoids.

[Oh]

I've ruled out the transmission. I took the car to a mechanic. Had the whole transmission replaced and still have the problem. Any idea what else it could be? At this point i'm praying it's not the ridiculously expensive computer.