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Discussion Starter #1
My 93 Seville N*transmission has no TCC lock up, otherwise it shifts smoothly trough all the gears. Soon after going on the highway the service engine light comes on and if I check the codes while driving, there is PO39 current.

I can't feel TCC lock up either in the 3rd or 4th gear. I was thinking that maybe it is the TCC solenoid. What is the talk about some new prom? Could it fit my case? Where can you get it and for how much?
 

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94 Eldorado, and a 99 ETC
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I have the diagnostics flow charts for that code but they are too big to post on the forums.
If you want them you can e-mail me at:

Krashed989 @ gmail.com

take out the spaces.
 
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