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Discussion Starter #1
Yeah i know these things are a pita to work on but it was $400, so what the hell.

Anyways, I think the trans fluid pump is shot because it goes nowhere in any PRINDL position and the fluid does not show up on the dip stick.

Anyone have experience with Cadillac Northstars or 4T80e transmissions?
 

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DSMs are cool...
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Northstars had a lot of solenoid issues. Make sure you're checking fluid while the car is running and in park. Fill it up and go from there. If there are any check engine lights go to a shop with a real scanner to check codes. P0740 code is a common code also for the torque converter clutch. You're doing a rebuild for that one.
 
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