2020 Mustang GT 10R80 FMEM 6th gear on the dyno and the street

2020 Mustang GT 10R80

Cobra Jet Intake Manifold
Steeda CAI
CFM Twin 67mm Throttle Body with JMS Throttle Max (If anyone has good TB Data for this throttle body or a Twin 65mm for the 2018+, please let me know!)
E85

Hello,

I have here a 2020 Mustang GT 10R80 that is throwing a Wrench light in 6th gear on the dyno and stays on even with ignition cycles. Codes P0600 and P27B5 illuminates every time.
Attachment 105969


I've tried putting everything in the trans back to stock, but no improvement. I even went and used the stock throttle body data and no improvement.

I raised all the limits that I know of since in 5th gear the engine will spin to 8000rpms. Is there something I'm missing? I've searched through the forums but no concrete solution.

I only hit FMEM in 6th gear. around 6800RPMs-7200RPMs


Attachment 105971
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Attachment 105974

Attachment 105973

Attachment 105975


Here are 3 logs and 2 Tune files, one modified and one stock.

Thank you

I had the same issues your facing your troubles are in the transmission tunning side you have to raise lots of limiters. such as lower clip, etc.
Also 1:1 gear ratio is achieved in 7th gear in order to measure hp accurately.

u have alot problems throttle closing etc

So after taking the time to carefully read the existing threads about the 10R80 on here and applying changes, I was able to stop the Trans FMEM, P0600 and P27B5 from occurring.

I was able to finish calibrating the car on the dyno and made pretty good power and it's nice to be able to do a full sweep without interruption. On the street, I got the car shifting at 7800 RPMS from 2nd-6th.

I am going to report back in 1 week to ensure the issue is fixed and post my findings here. Will be driving the car everyday.

What did you change?
I?ve been messing around with my truck and it does something similar but doesn?t throw a wrench. It will short shift into 7th than shift back into 6th then back into 7th. Very strange
It does exactly as commanded the rest of the gears 1st-5th

Quote:

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Originally Posted by NA_F150

What did you change?
I?ve been messing around with my truck and it does something similar but doesn?t throw a wrench. It will short shift into 7th than shift back into 6th then back into 7th. Very strange
It does exactly as commanded the rest of the gears 1st-5th

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if you want help make a new thread and post your tune and usable log file...

i can do it to u same problem and i solve it

bro u can use this file to solveur prolem

Sorry it took quite some time to get back to this thread,

I was able to fix the issues. it's all related in the trans side of tuning.

There were more areas I had to work on to get it to stop.


Attached is the file
Attachment 107379