Trans Fault message, No Codes
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Tuned
Joined: Dec 2004
Posts: 312
Likes: 19
From: SoCal
Trans Fault message, No Codes
I have a 2008 F150 regular cab, 6-8 bed, 4.2L V6, about 185K miles, I guess a 4R745W? About 4 days ago I began having shift problems. When taking my foot off the gas at freeway speeds, the truck bucks. No shift problems accelerating or cruising. I first thought it was fuel starvation.
But then a day or two later a message appeared in the little odometer window, "Trans Fault". I attached my Scangauge and there were no codes found.
I tried running with O/D off, and the symptom went away - no sudden slowdown. Of course, I can't get out of third. So I can drive at 2700-ish RPM with no problem, other than the effect on mileage.
I live in a condo, do no have a garage, and cannot do anything involving fluids, so it is at the dealer for diagnosis. Any thoughts on the cause?
But then a day or two later a message appeared in the little odometer window, "Trans Fault". I attached my Scangauge and there were no codes found.
I tried running with O/D off, and the symptom went away - no sudden slowdown. Of course, I can't get out of third. So I can drive at 2700-ish RPM with no problem, other than the effect on mileage.
I live in a condo, do no have a garage, and cannot do anything involving fluids, so it is at the dealer for diagnosis. Any thoughts on the cause?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,709
Likes: 2,629
From: SE Florida
You can get Forscan and use that to read codes. It will read all of your codes. Get it at www.forscan.org.
Thread Starter
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Tuned
Joined: Dec 2004
Posts: 312
Likes: 19
From: SoCal
To @everyone: Dealer says P0316, P0731 codes. Feels a complete Transmission replacement is needed - $4900-ish.
Those codes don't seem to imply a complete replacement from what I have seen, but my experience is limited.
To @Mark Kovalsky : the Forscan developer says he is pulling Forscan lite from the Apple App Store. I guess I will have to buy a Bluetooth adapter anyway, and acquire the full Forscan version.
Those codes don't seem to imply a complete replacement from what I have seen, but my experience is limited.
To @Mark Kovalsky : the Forscan developer says he is pulling Forscan lite from the Apple App Store. I guess I will have to buy a Bluetooth adapter anyway, and acquire the full Forscan version.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,709
Likes: 2,629
From: SE Florida
The full version is still free. You just need a laptop to run it. It's still cheaper than a really good scan tool, and it does more.
Once you have Forscan you can look at live data to see if the trans is really slipping. If it is slipping, then it will need to be rebuilt.
Once you have Forscan you can look at live data to see if the trans is really slipping. If it is slipping, then it will need to be rebuilt.
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