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4L80E Limp Mode possible causes?

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Old 01-10-2012, 03:57 PM
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Update: Checked Voltage of my Optima read top in the rear and showed 12.2 volts (suppose to be around 12.8).

Below is a log of parameters I ran using my trans config, something it showed was ignitino voltage was 11.0 V.


EDIT: For some reason I can't load my Config?? BUT force motor duty cylce is 4.7%, Force motor current is 0%, Line pressure 90%, Trans shift mode is Normal D2
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Old 01-10-2012, 05:12 PM
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Update: I talked to Frank at performabuilt and he mentioned to me just turning the key on would only show second gear regardless and that I needed to run it. Well I was hoping the solenoids would fix the problem and I believe they did look at this log

It shows first gear when instantly when the car is running (like it should), its too wet to drive so I will confirm in the morning.

looks like input and output rpms match perfectly (Is this normal)?
BTW ignition voltage jumped to 13.00V.


Sure hope I still have good news in the morning.

Big thanks to all that helped, I really appreciate it. Stay TUNE

Last edited by T/A KID; 01-10-2012 at 05:46 PM.
Old 01-10-2012, 06:14 PM
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Originally Posted by Jake's Performance

You aren't going to show anything but 2nd until you have pressure.
Like I said earlier, when you power up the trans, you won't show anything but 2nd until you have pressure (run the car).
Old 01-10-2012, 07:04 PM
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Jack the rear end up and put stands under it and run it through the gears. You will know if its shifting.



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