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Once P2763 is triggered, the computer sends a signal to maximize line pressure. This causes the shifts to be quick and sometimes hard. Has anyone seen this before?

I went up and down the road in my neighborhood keeping it in D2. The fault does not occur. The alarm code is triggered usually when shifting from 3rd to 4th gear, but it will trigger while riding in 4th, or while driving in D3, in 3rd gear.

What research I have found says that the code is triggered by a short in the TCC Solenoid Control Circuit. It has to be something involved with 3rd and 4th gears. Anyone know what is causing my problems? Anybody seen this before.

BTW- its a 2004 Deville.
 
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