Transmission problem

[Rockhouse]

Two months ago my 2014 Ford Raptor with a 6R80 trans began having issues that pointed to a bad lead frame. I replaced the lead frame and all was well. Fast forward to a week ago. Trans started jumping out of gear then threw a P0979 code. Shift solenoid C control circuit low. I did some research and determined its probably a bad solenoid. I changed all of the solenoids with ones of the same strategy numbers. Still doing the same thing and throwing the same code. Could i have a bad lead frame or is the problem elsewhere?

 

[CoronaRaptor]

Did you check the wiring harness which leads to the transmission, it might be shorting out. There have been known issues of the harness connector going into the transmission and where the harness runs around the exhaust.

 

[Rockhouse]

Took a quick look. Will revisit. Thanks

 

[MTF]

You may want to check out both videos I found about the leadframes.

GEN 1 - PCM Error Code

Hey, so I've been battling this problem for a few weeks now. I'll copy/paste what I posted on another forum that hasn't led to anything solving it just yet. It's not a Raptor but has the motor/trans just the same, so hopefully someone might have heard of this problem. POST 1 Alrighty, I'm...

www.fordraptorforum.com

 

[Rockhouse]

Lead frame replaced two months ago

 

[MTF]

I understand but what exactly did they replace?
Usually they just replace the LeadFrame Bulkhead Connection.
My understanding is sometimes the dealer doesn't replace all the parts, so it's just good info for you.
I hope you have the time too watch the two videos, he explains how moisture corrodes and can short things out in the LeadFrame assembly it's self.

 

[Rockhouse]

I did the work. Changed out the lead frame, the bulkhead connector, the plastic block going to the pump and the filter

 

[CoronaRaptor]

I did the work. Changed out the lead frame, the bulkhead connector, the plastic block going to the pump and the filter

I have heard of one member having a bad new lead frame awhile back, but it seems to be rare. Check out the wiring harness first would be my suggestion, hope you find something easy.

 

[The Car Stereo Company]

might have to pull that lead frame out and check the valves on it

 

[MTF]

^^^ That plus check both input and output speed sensors.