Remanned tranny installed but same problem
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Trailering
Joined: Mar 2021
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Thank you very much
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Trailering
Joined: Mar 2021
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Checked fuse #32, 33, 34 and all are good so nothing there. I have no clue as electronics are not my strong suit at all. Is there a chance Ive got a pcm issue? Manager at shop said its a possibility. Anything I can do to check/trouble shoot it?
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
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While a pcm can fail its often blamed because its the black box boog a loo no one understands . I think exposed wiring and connectors are more likely first .They get chaffed-burnt /chewed/pinched on- especially under truck -corroded -wet salt etc.
Fleet Mechanic
Joined: Jul 2010
Posts: 1,354
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From: Winnipeg
If you have a multi-meter you can check the wiring harness from the pcm to the connector of the transmission for power. It should be a violet/white wire from fuse 33 to the transmission connector plug, according to my wiring diagram. With the connector removed at the trans you could also check for bent or loose pins. It's best to leave it to someone who knows how to troubleshoot with a wiring diagram as you wouldn't want to do damage to your pcm.
Laughing Gas
Joined: Dec 2009
Posts: 799
Likes: 13
From: East L.A.
I had an issue with a 1995 F-150 and shifting issues similar to what you described. Listen to Mark Kovalsky...
https://www.ford-trucks.com/forums/1...-shifting.html
And find a good shop. Often, good general repair shops can refer you to good places that they recommend for specialty work...like transmissions.
https://www.ford-trucks.com/forums/1...-shifting.html
And find a good shop. Often, good general repair shops can refer you to good places that they recommend for specialty work...like transmissions.
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Trailering
Joined: Mar 2021
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From: Southern California
They are wrong. If the light is still flashing it means the problem that is setting the code is still present. While it is true that there is some learning going on, all that is learned is shift feel, i.e., how hard or soft the shifts are. It doesn't learn the new trans to clear the codes.
Without talking to them I can't tell if the shop is lying or incompetent. But I'll bet your problem is that they are one or both of those.
Now that you've spent the money on the remanned trans, you need someone that can diagnose the original problem, which is still present in your truck. I'll bet the place you took it can't do it, but maybe I'm wrong. It is most likely a damaged wiring harness.
Without talking to them I can't tell if the shop is lying or incompetent. But I'll bet your problem is that they are one or both of those.
Now that you've spent the money on the remanned trans, you need someone that can diagnose the original problem, which is still present in your truck. I'll bet the place you took it can't do it, but maybe I'm wrong. It is most likely a damaged wiring harness.
Lead Driver
Joined: Sep 2006
Posts: 7,907
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A look at all the code disriptions suggest the harness has been damages, burned crossed or grounded.
Complete incompetence by not looking up the codes for an honest look at the possible trouble.
With those codes no transmission will work correctly.
With the codes as shown, it is very unlikely the PCM is at fault for that many different transmision control issues or it could not tell you all the different the codes.
It's like what you would get from people who only turn wrenches and guess the rest.
It always comes back to bite.
If a bad harness is found to be the original problem, the shop owner has to give a little for his incompetent employee working like this..
Good luck.
Complete incompetence by not looking up the codes for an honest look at the possible trouble.
With those codes no transmission will work correctly.
With the codes as shown, it is very unlikely the PCM is at fault for that many different transmision control issues or it could not tell you all the different the codes.
It's like what you would get from people who only turn wrenches and guess the rest.
It always comes back to bite.
If a bad harness is found to be the original problem, the shop owner has to give a little for his incompetent employee working like this..
Good luck.
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Trailering
Joined: Mar 2021
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Heres an update.
first shop had done the "diagnostic" work and came to conclusion that the computer was at fault. I am obviously fed up with them and took to another shop and they found the issue in 3hrs. Bad connection at plug near computer. Corrosion/broken. Got it fixed and Im finally back on the road.
I learned an expensive lesson and found a great shop for future repairs.
Thank you all for advice. Great forum here
first shop had done the "diagnostic" work and came to conclusion that the computer was at fault. I am obviously fed up with them and took to another shop and they found the issue in 3hrs. Bad connection at plug near computer. Corrosion/broken. Got it fixed and Im finally back on the road.
I learned an expensive lesson and found a great shop for future repairs.
Thank you all for advice. Great forum here
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
Likes: 193
Glad you got it fixed and you didn't have to go thru blaming it on a pcm -that's a lot of money and trouble .
Finding good diagnostic guys is difficult .in every state. Maybe you should name that shop for others in your state.
Finding good diagnostic guys is difficult .in every state. Maybe you should name that shop for others in your state.
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