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GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 29396
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a 2005 Grand Prix. It intermittently shifts hard from

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I have a 2005 Grand Prix. It intermittently shifts hard from 1st to 2nd gear and 2nd to 3rd gear. Once it is in this mode of shifting hard, it will not go away until I restart the ignition. Do you have any idea what could be causing this?

Submitted: 7 years ago.
Category: Pontiac
Expert:  GM Tech (Cam) replied 7 years ago.
Welcome. This is a common issue on the 4T65E transmissions. The issue is the pressure control solenoid is getting stuck in the high pressure setting. The repair is to replace the solenoid. It is behind the pan on the drivers side of the transmission and the transmission needs to be partially removed to change this solenoid. This will not cause any damage for the short term and also flushing the fluid will not likely fix this.
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