6.0 multiple shift solenoid codes
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Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
6.0 multiple shift solenoid codes
This is my little brothers truck. A 05 f250 that is drove hard. It has a p0756 p0761 p0766 p0771 and a p2701 p2702 p2703 and a p2704. Right now reverse does not work it just goes forward. In park it is trying to go forward. I disconnected the batteries after I got these codes to try and reset everything. He did have a parasitic draw on the batteries and had a bad connection on the batteries which may have had something to do with this. I find it hard to believe the 4 shift solenoids would go out at once. Where should I start?
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Postmaster
Joined: Jan 2005
Posts: 4,424
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From: BC Canada
Crap, that's a lot of codes, I agree with the reboot and to try and run a full relearn and see what comes back. Make sure fluid is at the correct level hot and make sure it's reasonably clean, if it's older fluid a spill and fill is in order, just what you can get out from the drain plug. If you are brave, could pull the pan and check all connectors to see if you have a bad connection to the harness, and inside the pan. (Maybe our local tranny guy will chime in here on this strategy)
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Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
Update. The fluid is red but has a burnt smell. The ohmed out the shift selonoids from the pcm connector #3 pin 7 to 9 10 11 12 13 and they all had 4.5 ohms. These are the 5 shift selonoids according to the diagram I found. Anything else to check before removing the trans?
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Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
I will ohm them to ground on top of between the 2 wires. This should show a chaffing problem. I can't see 5 solenoids going bad at the same time. Or are they relying on one another like fuel pressure and injectors?
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,643
From: SE Florida
They are all totally independent. You can get all of them to fail if the trans is generating a lot of fine particles.
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Cargo Master
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From: Jefferson, Iowa
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Lead Driver
Joined: Mar 2010
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From: Woodbridge, Ontario, CA
I am not a transmission tech by any means (even though I possess the Ford specialty certification), but if I recall correctly, there was an ONP (04B24 I remember the number correctly) back sometime to address an issue with the reverse clutch drum snap rings "walking" out of the case grooves. The ONP seemed to cover late '04 model years, but I also seemed to remember seeing some early '05s coming in with this failure as well, but not being covered under the program. Again, I'm not a transmission tech but I'm just throwing ideas out there.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,643
From: SE Florida
That problem started at Job #1 2005. No 2004 model trans had the stupid design snap ring. If the engineer that released that part for production had done his job correctly then my 2005 development trucks would have had that part and I would have had that failure in 2003 and 2004, and the part would have never made it to production. [/rant]
The 2004 models, and only that year, had a different problem. Manufacturing let a process get out of control. One of the pinion shafts in the planetary assembly didn't get staked properly. The shaft would gradually work it's way out where it contacted other rotating parts. It then machined it's way into the other part. That generated A LOT of metallic contaminants.
If the torque converter is slipping it will NOT generate the fine particles that will make the solenoids stick.
The pan should come off. See what the bottom of the pan looks like. If it is covered with metallic powder then the trans needs to come out and be torn down to see what's wrong.
The 2004 models, and only that year, had a different problem. Manufacturing let a process get out of control. One of the pinion shafts in the planetary assembly didn't get staked properly. The shaft would gradually work it's way out where it contacted other rotating parts. It then machined it's way into the other part. That generated A LOT of metallic contaminants.
If the torque converter is slipping it will NOT generate the fine particles that will make the solenoids stick.
The pan should come off. See what the bottom of the pan looks like. If it is covered with metallic powder then the trans needs to come out and be torn down to see what's wrong.
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