Weird trans issue
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Joined: Feb 2021
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Weird trans issue
I just put in a used tranny from a guy pulling it from a truck with a blown head gasket ( Same year and everything). I put it in, hooked everything up and she drive beautifully until after about an hour of driving now it’s like its in some sort of limp mode, seems like 3rd gear is the only gear I have and it idles high (roughly 850 RPM) and it’s giving me two DTC codes: ( P0657, P0718 ) and can’t seem to figure out why. Any ideas?
Fleet Owner
Joined: Jan 2004
Posts: 26,007
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From: Brentwood,CA
Did you have the valve body calibration updated to match the new unit? The calibration number is on a sticker on the case and that calibration needs to be updated or else you will have issues.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,738
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From: SE Florida
What year? What engine? What transmission?
The advice above is correct for some models, way off base for others. Since I don't know what you have I can't tell you if it is right or not.
The advice above is correct for some models, way off base for others. Since I don't know what you have I can't tell you if it is right or not.
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,738
Likes: 2,667
From: SE Florida
There is no valve body calibration that has to be matched to anything.
If it is doing what you said, there are more codes. Those codes will not cause the symptoms you have. Get a better code reader. Forscan is an excellent choice.
If it is doing what you said, there are more codes. Those codes will not cause the symptoms you have. Get a better code reader. Forscan is an excellent choice.
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