hello all, new to the forum here. i am a transmission builder in Illinois and im looking for some help here. ive done a lot of searching on the subject and have seen many people have had this issue yet no one has posted any fixes for it that i have seen yet. so im hoping this thread will put an end to that and help a few people out here. with that said here is the skinny.
the truck belongs to a very good customer of mine and is a 05 f350sd 6.0 td with 5r110 torqshift tranny.
the vehicle presents with these symptoms and codes
-there is a delay from p to r and its intermittent, sometimes it will be in a weak reverse where it wont creep unless you give it some gas, sometimes it will hit reverse hard after this. sometimes it bangs reverse
-there is a delay into drive intermittently with the same symptoms as reverse where sometimes it bangs and sometimes it will take a little throttle to get it moving
-once the trans is hot (operating temperature) it has trouble downshifting. my solus tells me sometimes it tries to start off in 3 or 5 then sometimes it will bang back down into first and almost chirp tire with little throttle input
-tow haul light will flash after several miles and then it only has 1-2-3-4 no 5-6. then the starting off symptoms get worse
-throws codes for
p0766 shift sol d performance/stuck
p2701 friction element b apply time range/performance
p2703 friction element d apply time range/performance
p0700 trans control system fault.

now i have read several people have had similar or duplicate symptoms and havent posted their fixes. id like to see this thread list these possible fixes not just to help my customer get the most out of his pride and joy but to help the others with these issues.
so far the ideas i have are as follows
replace solenoid D
direct clutch replacement and seals for corresponding drum
torque converter replacement and pump replacement
harness rub through between pcm and transmission

the truck has had similar issues a year ago. upon testing line pressure i found it was out of spec and replaced the epc. (electronic pressure control solenoid) and this cleared most of it up.
i have had the pan down many times and the fluid has not been burnt and there is little debris in the pan. nothing i would consider beyond normal wear.
tomorrow i will be dropping the pan again to inspect the magnet and fluid as well as the condition of the harness. i will post my findings at that time. im hoping between now and then some of you will be able to point out a few possibilities to get me on the right track.

thanks in advance for all the help!
cheers.

 

You have two codes pointing at SSD. It's likely that solenoid D has an issue. I wouldn't expect you to find a problem in the direct clutch, the friction element code could be set by a bad solenoid.

That doesn't explain the P2701. That could be a clutch or seal problem since there is no corresponding solenoid code.

 

thanks mark! (im mark too btw)
im going to try the d solenoid tomorrow then.
are these trucks prone to pcm or databus failures? the truck had a myriad of codes in it but only the two 0766 and 2703 returned.

 

No, they are not. That doesn't mean it doesn't happen, but it isn't a big problem. If you are in the rust belt ground problems can happen more often and cause a lot of problems.

 

I'll throw this into the mix just cuz something similar happened to me; 2 shops and corporate ford technician I know recommended fully tranny rebuilds/replacements based on similar symptoms. But this was on a 4r100 tranny.

Don't overlook the Differential Speed Sensor. Not sure on 2006 model, but it was used on previous yrs to supply info to both the abs (vvs signals module) and electronic transmission control. The pcm wasn't receiving a good signal from the sensor so it kicked the tranny into a "safe" mode - acted like you are describing here.

Problem was only uncovered because I was going to replace the transmission range sensor, which the dealer parts counter guy did not have on hand and stated he never sells them. He tossed me the differential speed sensor (but ford calls it something else-like a rear abs sensor?) and said "I sell ALOT of these".

Replaced it and have another 40K miles on tranny with no tranny issues.

Just a thought, and something else to eliminate.

 

Okay shift solenoid sspc-d or sol d replaced. problem remains. some other note worthy information would be:
ive found intermittent codes in almost every module on the truck including the park assist module.
it has turbo underboost codes that are intermittent.
on the test drive it started out perfect. best its been yet. after about twenty minutes of drive time i lost boost. as in no boost at all. truck barely managed highway speeds. then all the sudden the boost came back (almost like severe turbo lag in a race car) after that the transmission started acting up again. starting out in fifth. tow haul light flashes, no 5th or 6th gear. delay shifting from p-r and p-d is back intermittently as well.
fluid inspection found no burning or miscoloration
no significant debris in pan
two new codes for speed sensor input and speed sensor circuit. p0720 and p0722

based on the symptoms im leaning twords pcm. im going to visually inspect the harness for wear or shorts. if i find nothing i will check the harness to pcm on the solenoid d circut for resistance and short to ground.

any more info or diganostic tips are appreciated. also who else has encountered these symptoms before? what were your fixes for similar symptoms?

 

further update. i just finished testing the harness from the transmission to the pcm and found very low resistance (.6ohm) and no continuity to ground. i also tested from the pin responsible for shift solenoid d to every other pin at the ecu (as it could be shorted to another circuit) and found no continuity. im going to open the loom up to do a visual just to be sure but it does not appear the harness is the problem.

 

for poops and grins here are all the codes ive gotten. all intermittent
p0299 tc underboost
p0335 crank pos sensor circuit fault
p0470 exhaust press sen circuit fault
p0748 exh press control valve high
p0528 fan speed sen circuit no signal
p0700 trans control sys fault
p0766 shift sol d performance stuck
p2701 frict element b apply time
p2703 frict element d apply time
u1900 ABS CAN comm bus fault
b1352 ignition key-in circuit fault
b1483 brake pedal input circuit fault
c1710 rear inner right sensor fault
c1704 rear outter right sensor fault
c1701 rear outter left sensor fault (these 3 are park assist codes)
maf fault - no reading (vehicle does not have a maf from factory
p0720 output speed sensor circuit fault
p0722 output speed sensor no signal.

does anyone know if there is a power feed circuit that these all share?

 

Anything at all is helpful guys, don't be shy

 

Hand tight Mark will be back with you soon I am sure..

 

I don't have a wiring diagram, so I can't tell you if there is a common wire. I suspect there is one or more grounds are bad.

Do you live in the rust belt? These type of issues are more common where road salt is used.

 

the truck is in the rust belt. nw subs of chicago.
ive checked the pcm grounds and none of them show any signs of corrosion.
ill ohm them out and see if there is high resistance in any of them related to the circuits in question and post my results
however i did take off several grounds and sanded the terminals to make sure they are getting good connections.
the vehicle does have a plow on it if that helps at all. the plow install was done professionally at master hitch.

 

ANY grounds could be a problem. Grounds to the body, to the engine, to the trans, etc.

 

well i went through and checked a number of them. im looking in mitchell to see what other ones there are to be checked but so far i havent found a bad one. doesnt rule it out however. im also enlisting the help of a ford diesel tech and a ford trans builder right now. maybe they can find something i missed. ill continue to post my results.
ive seen other symptoms like this before but never so severe.

 

I agree with Mark that it looks like a power or ground fault at the PCM. Since so many of the sensors are reporting codes, I would also check the 5 Volt reference circuit. You can check it at any of the sensors that use the 5 V reference signal from the PCM. One of the wires on the sensor should be very close to 5 V with the key on. If not, then it is likely that one of the sensors that uses the reference signal is shorted causing many of the other sensors to report faults since they share the same 5 V reference.