Help Needed Electrical transmission problem Help! - F-Series & SuperDuty Diesel Forums

carneytowing · 01-02-2012, 02:10 PM

My truck is throwing tranny codes P0766 and P2703. I've always had a problem with a delay in engaging between P and R or D, but never any codes or real issue when driving. Now recently after a particularly hard day at work a couple weeks ago, it is having a bunch of issues that are frustratingly inconsistent. It drops out of gear when I hit the brakes at low speed or turn and brake (sometimes), other times it hangs in 2nd or 3rd (not sure) when I come to a stop and bogs down when I try and take off, then after a few seconds at steady pedal it will drop down to 1st and more quickly if I give it gas. Sometimes it will skip from 1st to 3rd and bog down on take off, more so when I have a load and I am easy on the pedal. It seems like when I am hammering on it, the tranny runs smooth. I replaced the direct clutch solenoid a few days ago and cleared the codes to try and fix the problem and it has the same issues. It even threw codes again but then I cleared them accidentally before I could see what the codes were. I've been trying all morning to get the truck to throw codes again but it won't, and it's still doing the same crap. Does anyone know what might be going on? I got an estimate for $1800 for a rebuild but I really think its something more simple.

DaveBen · 01-02-2012, 04:49 PM

It might help us if you told us something about the truck. I assume it is a 6.0 but what year? P0766 is a solenoid problem with the tranny and I can't find any reference to P2703. How many miles on the transmission? Why do you think it is simple fix with all of the problems you are having? Looks like rebuild time to me.

Dave

carneytowing · 01-02-2012, 06:37 PM

Yeah, it is a '07 6.0. Once the transmission engages, it is solid, and the problems only occur at low rpm, that's why I think it is an electrical issue. I am currently doing a valve body swap out of a wrecked 6.0 to see if it fixes the problem, if not, then maybe rebuild time, it has about 160k on it

carneytowing · 01-03-2012, 12:41 AM

Well, swapped the valve body, and it seems like I fixed it. I only drove it around my block a few times, but I am exhausted and I am going to save the rest of the testing for tomorrow. I will post what I find out.

carneytowing · 01-09-2012, 10:28 AM

Didn't fix it

01-02-2012, 02:10 PM	#1
carneytowing Wrecker Join Date: Oct 2011 Location: Houston Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Electrical transmission problem Help! My truck is throwing tranny codes P0766 and P2703. I've always had a problem with a delay in engaging between P and R or D, but never any codes or real issue when driving. Now recently after a particularly hard day at work a couple weeks ago, it is having a bunch of issues that are frustratingly inconsistent. It drops out of gear when I hit the brakes at low speed or turn and brake (sometimes), other times it hangs in 2nd or 3rd (not sure) when I come to a stop and bogs down when I try and take off, then after a few seconds at steady pedal it will drop down to 1st and more quickly if I give it gas. Sometimes it will skip from 1st to 3rd and bog down on take off, more so when I have a load and I am easy on the pedal. It seems like when I am hammering on it, the tranny runs smooth. I replaced the direct clutch solenoid a few days ago and cleared the codes to try and fix the problem and it has the same issues. It even threw codes again but then I cleared them accidentally before I could see what the codes were. I've been trying all morning to get the truck to throw codes again but it won't, and it's still doing the same crap. Does anyone know what might be going on? I got an estimate for $1800 for a rebuild but I really think its something more simple.

01-02-2012, 04:49 PM	#2
DaveBen SDD Senior Member Join Date: May 2005 Location: Ukiah, California Posts: 7,866 Thanks: 127 Thanked 505 Times in 488 Posts	It might help us if you told us something about the truck. I assume it is a 6.0 but what year? P0766 is a solenoid problem with the tranny and I can't find any reference to P2703. How many miles on the transmission? Why do you think it is simple fix with all of the problems you are having? Looks like rebuild time to me. Dave __________________ 2004 F-350 Regular cab with 6.0, Torqshift, 4X4, and just about all of the rest of the options. I added Guages, Satellite Radio, Air Horns, and a coolant filter. Bilstein shocks. Battery Desulphater that really works. Installed Jimmi Jammers. Pictures here: http://community.webshots.com/user/dbennett48 Completely Stock. I had a Detroit Diesel 8V92TA in a KW dump truck in 1980. That sucker would put out 425 hp but would never out pull a CAT.

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01-02-2012, 06:37 PM	#3
carneytowing Wrecker Join Date: Oct 2011 Location: Houston Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Yeah, it is a '07 6.0. Once the transmission engages, it is solid, and the problems only occur at low rpm, that's why I think it is an electrical issue. I am currently doing a valve body swap out of a wrecked 6.0 to see if it fixes the problem, if not, then maybe rebuild time, it has about 160k on it

01-03-2012, 12:41 AM	#4
carneytowing Wrecker Join Date: Oct 2011 Location: Houston Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Well, swapped the valve body, and it seems like I fixed it. I only drove it around my block a few times, but I am exhausted and I am going to save the rest of the testing for tomorrow. I will post what I find out.

01-09-2012, 10:28 AM	#5
carneytowing Wrecker Join Date: Oct 2011 Location: Houston Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Didn't fix it