Well. No reason to bypass this valve. Check the wiring, check valve solenoid resistance. If it is bad, drop pan and replace it. 1/2 hour of work. I dont remember price of valve... something about $10 for used......

Valve mounted in valve body. Remove its retainer and pull out valve.

 

How about the Overdrive Servo on the side of the trany? I have been reading these go bad about 70K, this car has 85K on it.

 

Ok, I am kind of at a cross road as what do try to do with this vehicle next. The problems with it are when it tries to upshift into 2nd or 5th gear. I have never had a problem with it downshifting.

I can turn Overdrive off, and when accelerating release the gas and it will shift into second. I drove the car for about 20 miles yesterday doing this and the O/D light never did start flashing or the PCM throw a code. However, if I keep accelerating, it will not shift into second, and around 30mph, the O/D light will start flashing.

Manual first gear does have holdback.

The solenoid pack has been replaced, and well as new fluid and filter. O/D band has been adjusted, so I know it is not broken.

It appears that is it a valve body problem, or the O/D servo is bad. Which one do you all think that it is? I am thinking if the O/D servo was bad that it would not go into 2nd gear at all?

If the valve body is the problem, what all should be replaced? the entire valve body and separator plate?

I am needing some advice and logic as to which of these is most likely the problem.

As a recap, the original symptoms of the car is that it will not upshift into 2nd or 5th gear. When the tranny fails to shift into these gears the PCM will have an error code of P0775, However, as I mentioned above, I have found that if I release the gas pedal at about 20mph the car will shift into second, and no error codes.

Thanks for all your help.

 

Usually ecu can detect electrical codes when you do not drive. ECU on start up (when U put igntion switch to on position) do a self-test. If you kan see current codes related with solenoid, but solenoid is new ore good, you probably have a wiering problem. If this code appeares on a run, when solenoid actuates, but no OD engages the problem may really be i valve body, servo ore band.

 

Yes, at this point I believe it not to be electrical, but it to be a servo or the valve body. I am try to decide which one it may be. I am a little confused as to which one it may be.

 

check to see if your vehicle has manual first engine braking

Matt

 

Yes it does have engine braking in Manual First.

 

Anyone have any thoughts?

 

if you have manual first than your gasket should be ok. i would suggest replacing it and installing a shift kit

Matt

 

Thanks forboy... Any reccomedations on where to get a shift kit and new gasket?

 

gaskets you can get from ford. you can also get a shift kit from there but others have suggested other companies. I dont think they make a new seperator plate for you vehicle but i would suggest buying one from ford with bonded gaskets. this lessens the chance of it blowing out later. please read my guide before trying this.

you might also try replacing the orings on the selenoids while you are in there. if one bypasses fluid, it wont work

Matt

 

The solenoid body is new. I don't recall orings on it. It has plate, that was gasketed, If I remember correctly

 

Well, I thought I would post an update. This evening I changed out the valve body, along with seperator plate with a bonded gasket. with a new one from Ford. Torqued everthing to spec, when I put it back together. The results is that is made absolutely no change at all. The car still has the exact same system that I describe earlier. While I was in there I did look, and both the overdrive and intermediate bands are intact.

So, unless it's the overdrive servo, I don't have a clue.

 

Any thoughts?

 

mabey it would help to tighten those two bands? im at a loss right now