F150 transmission neutralizes when shifts to overdrive

Are there any lights lit on the dash ? check engine , overdrive etc..
could be just a shift solenoid ... Try draining trans fluid an replacing filter. Have to drop transmission pan .. what's the fluid look like ? a nice pink color ? does it smell burnt ? Is it full ?

P0731 Ford - Incorrect First Gear Ratio
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

p0732 Gear 2 Incorrect ratio
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Shift Solenoids
- Shift Solenoids harness is open or shorted
- Shift Solenoids circuit poot electrical connection
- Transmission mechanical problems
- Transmission hydraulic control circuit

Start by inspecting the transmission oil level and condition, and change fluid if necessary.

also check OUTPUT SHAFT SPEED OSS for proper installation and function

hope this helps

-Sounds like shifting solenoid is not working properly. (It's inside the transmission valve body)


Good luck


Mai

You have a failed transmission.

Kinda sounds like it works when fluid is thick and not after it warms up. If it has been awhile since trans fluid and filter were changed it is the most simple thing to change. The torque converter is a big pump, it may be going and not providing enough pressure. This could be checked on most transmissions by a shop expert. Sometimes pressure can be adjusted externally.

Usually the transmission needs to be rebuilt in that situation. It's a very common problem if that's the famous automatic overdrive transmsission. AOD I have had three trucks that have done that. It usually starts by shuttering when it shifts and than finally goes out. Sometimes the Lucas transmission treatment gives you a little more time, but it sounds too late for yours. From what I understand (mechanic told me) that when the overdrive goes out, it takes third gear with it. If you drive in hilly areas, that overdrive is shifting in and out all the time as you go up and down hills and wears it out. My Dad had that hapen on his F150 and he replaced his transmission with a junk yard transmission that turned out to have the same problem. I had that transmission replaced with a Jasper rebuilt and it worked great. I think it was $1300 for the rebuilt trans with the old one core trade in. I think when 3rd gear goes out, you can only go about 45mph without over reving the engine. I saw that same problem with a Ford Crown vic with that same transmission and 302 engine that my neighbor had.
Did your third gear just go out all of a sudden or were you getting like a shuttering or kind of a grinding sound when it shifted?

its most likely an E4OD,its probably a bad shift solenoid inside the transmission...but you have to take the pan off and i cant quit remember but may also have to pull off the valve body,if that has to be done then there is 8 or 9 ball bearings in there that will fall out.I would call a transmission shop and ask if it has to come out.

That's probably why it's lurching. It's try to shift down. The valve body is a reasonable suspect. Was the balve body yorgued? Are the ck balls in the proper circuits? If the valve body has any loose bolts, the gaskets need to be replaced again. Good luc

Sounds like the passing gear cable is out of adjustment. Get a shop manual and see what the specs are on how to adjust it properly. It is a pretty simple fix.

Have you ever changed the transmission fluid flush and replaced the transmission filter?