Transmission not shifting correctly?

Tiny
MOLLYJROPER
  • MEMBER
  • 2005 FORD EXPEDITION
  • 115,000 MILES
I was driving and all of the sudden my expedition would not shift into third gear. All it does is rev but wont accelerate. I went slow and parked it. I turned the overdrive off and it shifts just fine. It is an automatic and I am wondering if I need to replace the transmission or can I fix it without replacing the entire thing. It is very costly. Any thoughts?
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Monday, November 11th, 2013 AT 6:52 AM

32 Replies

Tiny
HMAC300
  • EXPERT
This is typical when the turbine shaft speed sensor goes out or is off we should run the codes by using this guide while checking out the sensor which is in the diagrams below.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (Below). Please let us know what happens.
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Monday, November 11th, 2013 AT 7:01 AM
Tiny
SLAUGH009
  • MEMBER
My truck had the same issue. I just went for a new sensor which did the trick. Thank you.
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Thursday, November 12th, 2020 AT 9:17 AM
Tiny
STEVE MCDONALD
  • MEMBER
  • 2004 FORD EXPEDITION
  • 5.4L
  • V8
  • 2WD
  • 100,000 MILES
I had the transmission replaced and the guy that installed it said it was not shifting because the computer had to be reset. So I looked on YouTube and it said to reset the PCM so I did and it is still not shifting. What is wrong?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good evening.

If he is a repair shop, he should have re flashed the TCM. Removing a battery cable does nothing. That is not a reset. He had the battery disconnected when he did the job.

It may have to be re flashed or programmed which requires a scan tool with access to Ford web site to download the current version for the truck.

It could also be that the transmission may be the reason it is not shifting as well.

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
STEVE MCDONALD
  • MEMBER
Mr. Transmission told me though I replaced the transmission it should not have to be flashed that the transmission is not the kind that has to be flashed. It will cost me $90.00 to be flashed at another shop that does it. What exactly do you think I should do. I am trying to do it right my speedometer does not work also so could it also be the speed sensor?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
If the speed sensor is not working then it will not shift.

Is this a new or used transmission? What was the original reason you replaced the transmission?

The issue with the speedometer needs to be repaired first before doing anything.

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
STEVE MCDONALD
  • MEMBER
Also, I checked at AutoZone just to see what their scan would say and it said B1342 ECU malfunction. What does that mean? Should I start from here?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
That code is the air suspension control module. Nothing to do with your issue.

Start with having them find out why the speedometer is not working.

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
STEVE MCDONALD
  • MEMBER
A used transmission and before I had any problems the flywheel was bad and my father let someone he knew fix it and that is when the problems started. It would reverse but not move in drive so I had it replaced.
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+1
Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Okay, I would have the speedometer diagnosed and repaired. If that does not fix it then you got a bad transmission.

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
STEVE MCDONALD
  • MEMBER
One more question Roy. I appreciate everything. Where can I go to have this diagnosed and repaired correctly?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Any repair shop could do this repair.

What about the shop that installed the transmission? Did they look at it for you?

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
STEVE MCDONALD
  • MEMBER
Let us ask you one more thing. From the looks of it I may be stuck with this transmission the guy that installed it a good mechanic and he did not say nothing was wrong or broken when I took it to him, but said if it is the transmission could I drain it an use some Lucas in it after I get speedometer fixed or should I flash it first then try that?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
No, do not add any additives. They do nothing and will only cause the valve body to not work properly. Just change the oil/filter in the transmission and use new fluid.

Roy
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
SHANE12345
  • MEMBER
  • 2003 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
Speedometer reads way too fast. Sets code 1270. Unhooked harness on transverse case still shows speed way off. What is making speedometer way off? Scan tool shows speed way off too.
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
HMAC300
  • EXPERT
If you got stuck in mud/ice, snow and wheels spun that is what sent this code. Reset the PCM or erase codes, auto parts can do this if you do not have a scanner. Then see if it is okay then. If not it may be a bad speed sensor.
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
SHANE12345
  • MEMBER
Have cleared all codes truck came in would not move installed used transmission truck moves shifts twelve no three then shuts down.
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
HMAC300
  • EXPERT
What does shifts twelve no three mean?
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
SHANE12345
  • MEMBER
Has first and second gear no third.
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)
Tiny
HMAC300
  • EXPERT
Sounds like it is in limp mode. Are there no other codes? If not then check harness for full engagement and maybe put some dielectric compound on it for better contact. Also, I am assuming you have checked fuses under hood and have good connection at output speed sensor. It may be a transmission problem like a valve body.
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Thursday, November 12th, 2020 AT 9:18 AM (Merged)

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