[Mike Barrett]

2006 Ford F-250 6.0 Powerstroke 5R110

I am having 2 transmission codes come up
P0766 Shift Solenoid "D" Performance/Stuck Off
P2703 Transmission Friction Element "D" Apply Time Range/Performance

I did a drain and fill, replaced both trans filters and the Shift Solenoid D with a brand new one, after doing this I am still having the same 2 codes come up and it will go into limp mode, also when I had parked it originally it would not shift out of any of the forward gears. At times when you shift into Drive it will not shift and will slam into gear, and will do the same into reverse. I am thinking that the Tranny needs rebuilt, but just want to confirm my thoughts.

 

[bismic]

From what I understand, it could just be dirty fluid and a stuck solenoid.

If all fluid and filter maintenance has been done on time, then it potentially could be more serious.

 

[ford_doctor]

He replaced the solenoid. The problem is internal - either the main control or direct clutch. OVERHAUL TIME!

 

[bismic]

Talk about poor reading comprehension!

Hopefully it was an OEM solenoid.

 

[bismic]

And just as an FYI (definitely not disagreeing with the above) - one simple drain and re-fill only gets about 45% of the old fluid out of the system. If maintenance has been lax, then the fluid is still going to have a bunch of the old fluid in it (not that it probably matters in this instance).

 

[ford_doctor]

I have never seen any wisdom in attempting to "fix" shift ERRORS with a fluid change. It's already too late. Changing a solenoid... maybe... but what caused the solenoid to fail? On a 5R110 its usually debris unless you have a circuit code. In this example, we do not.

 

[bismic]

I guess the thought process is "Why change a solenoid out when the fluid is still dirty?".

 

[ford_doctor]

"Dirty fluid" and debris are two different things. Any time you remove the pan on a transmission with issues the first thing you do is inspect the pan - normally there will be some gray looking goo on the magnet. If there are fine particles on the bottom whether it be aluminum, iron or brassy colored something is grinding up - those particles commonly get picked up and pass through the screen can end up anywhere the fluid goes. Large chunks - put the pan back on, remove the trans or call a tow truck. For a solenoid - one small piece of crap is all it takes. Could be metal or a random bit of clutch material. The OP is not wrong to trying a new solenoid - it is the least intrusive repair you could attempt and sometimes successful. Expecting a fluid change to correct clutch application faults is more wishful thinking.

 

[bismic]

No doubt.