Transmission troubles - Pontiac G6 Forum
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post #1 of 4 (permalink) Old 02-25-2018, 05:56 PM Thread Starter
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Transmission troubles

I had a bad shift solenoid in my 07 G6, so I decided to change the filter and replace both shift solenoids as well as the lock up solenoid and the EPC solenoid. This is a V6 with the 4t45e transmission. After changing the solenoids and filter, I filled the fluid and ran it through the gears while still on jack stands and noticed the wheels were spinning forward regardless of the shifter position and if I brake checked, it did not feel as though the transmission was fully engaged. I had struggled some trying to get the new filter in place, so I removed the pan and found the filter had come loose and was lying in the pan - so I re-installed, ensuring that this time it was properly seated. I replaced the pan and re-filled the fluid with similar results, only this time the tires go in reverse regardless of the gear selector position.... I pulled the pan again and the filter is fine. Any ideas on what to check? I had no slippage or issues prior to changing the solenoids... what have I done???
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post #2 of 4 (permalink) Old 08-04-2019, 10:04 PM
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I also have an 06 g6 doing the same thing, had a code of p0751 for 1-2 shift solenoid stuck open, we didnt new filter and solenoid and now all gears are forward. I'll check my filter in the morning. Also mines a gt so it has the manual and were the milage is it shows m1 dont know why but might check yours. Hopefully some on here will help us in the right direction.
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post #3 of 4 (permalink) Old Today, 04:18 PM
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Solenoid application for 1st and reverse are the same, 1-2 Shift solenoid ON, 2-3 Shift Solenoid Off. Difference between 1st and Reverse is position of the manual valve. Is it possible the link to the valve got disconnected while installing the solenoids??

There is an ATSG manual posted here:

page 53 shows the manual valve link.
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post #4 of 4 (permalink) Old Today, 04:19 PM
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