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97 Posts
Discussion Starter #1
Truck:
2007 Ford F250 CCSB 4x4
6.0L 316,000 miles


Problem History:
I've owned the truck for 5 years. It had 142,000 miles on it when I bought it. The truck has been an absolute dream until August 2018. I had a guy fall asleep at the wheel and rear end me at a pretty high rate of speed. Got the truck back from being fixed and I've had problems after problems but the issue I'm having now is the tranny.

Out of the blue the truck had a bad delay going into Drive or Reverse. Researched online and found that it was probably the line pressure solenoid. Pulled the pan, replaced that solenoid & disassembled/cleaned the remaining 6 solenoids. Changed internal & external filters as well as the TFT sensor. Filled it up with new Mercon SP and everything was back to normal.

Three weeks later it starts making the 2-3 shift really quick and now most of the time it just skips 2nd all together and goes 1-3. about 20 miles later, the tow/haul starts flashing, I pull the codes and get P2701 & PO756 (overdrive solenoid). This has me really confused because I can reset the KAM and it functions perfectly in OD for a day or two and then the tow/haul comes back and wont allow it into OD.

My question is why am I having troubles with 2nd gear but the trans is throwing OD codes?
 

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Registered
Joined
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8,585 Posts
Truck:
2007 Ford F250 CCSB 4x4
6.0L 316,000 miles


Problem History:
I've owned the truck for 5 years. It had 142,000 miles on it when I bought it. The truck has been an absolute dream until August 2018. I had a guy fall asleep at the wheel and rear end me at a pretty high rate of speed. Got the truck back from being fixed and I've had problems after problems but the issue I'm having now is the tranny.

Out of the blue the truck had a bad delay going into Drive or Reverse. Researched online and found that it was probably the line pressure solenoid. Pulled the pan, replaced that solenoid & disassembled/cleaned the remaining 6 solenoids. Changed internal & external filters as well as the TFT sensor. Filled it up with new Mercon SP and everything was back to normal.

Three weeks later it starts making the 2-3 shift really quick and now most of the time it just skips 2nd all together and goes 1-3. about 20 miles later, the tow/haul starts flashing, I pull the codes and get P2701 & PO756 (overdrive solenoid). This has me really confused because I can reset the KAM and it functions perfectly in OD for a day or two and then the tow/haul comes back and wont allow it into OD.

My question is why am I having troubles with 2nd gear but the trans is throwing OD codes?

You're on the original transmission at 300k+ miles it sounds? Honestly things are going to start failing with all those heat cycles and throwing new parts at it is probably just a bandaid. The 5r100 is a very stout transmission and its completely electronically controlled. It could be a feature built into the programming saying "hey im old take me to a shop" Not to say you couldn't fix whatever the problem is but 300+k on a transmission is really good. At that point I would not be wanting to throw any more money at it due to age/miles etc.
 

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97 Posts
Discussion Starter #3
Yes, original transmission. It still has the original head gaskets too, believe it or not! For a 6.0, it's been a pretty good truck. In 174k miles, I've only replaced the injectors, glow plugs, and alternator.
 

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Yes, original transmission. It still has the original head gaskets too, believe it or not! For a 6.0, it's been a pretty good truck. In 174k miles, I've only replaced the injectors, glow plugs, and alternator.
Very nice! Ya to be honest at those miles I would wager its gonna need a major rebuild or replacement soon vs hoping some parts will fix it longterm at least. Sam wyse, Dorsey and john woods are some very good names. Aslo believe it or not the ford replacement units are very affordable and as you saw treated you very well etc.
 
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