Need help 2005 Ford Expedition transmission

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Jul 16, 2015 | 05:37 PM

michael warford

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Need help 2005 Ford Expedition transmission

Yesterday when I was taking off from a red light the transmission didn't engage till about 2k rpm and kind of banged into gear but drove fine. Kept doing it and then got worse. Now feels like it takes off in second gear then 3 seconds later goes into first. While driving it is shifting randomly to 3rd then to first without even applying more throttle. The overdrive light starts blinking but no other codes or engine light comes on. I thought maybe the TPS so I changed it but made no difference. Maybe torque converter but I don't know. Need help.

Jul 16, 2015 | 08:34 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

You need the codes. When the OD light flashed one or more codes were stored. If you can't read the codes you have the wrong tool.

Jul 16, 2015 | 08:42 PM

michael warford

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The check engine light never comes on. The overdrive light flashes but when I shut off and start back up its not on anymore

Jul 18, 2015 | 08:41 AM

alloro

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From: 0,0,1

Quote:

Originally Posted by michael warford

The check engine light never comes on. The overdrive light flashes but when I shut off and start back up its not on anymore

He means the transmission codes, not the engine codes. You need a different code reader for the tranny.

Jul 18, 2015 | 09:16 AM

Skauber

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You can try FORScan with a bluetooth ODB scanner, it can read codes from all modules, including transmission codes.

Jul 18, 2015 | 12:43 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,725

Likes: 2,651

From: SE Florida

Quote:

Originally Posted by michael warford

The check engine light never comes on. The overdrive light flashes but when I shut off and start back up its not on anymore

And that's why you need to read the codes. When the overdrive light flashes it means codes have been stored in the computer's memory. They will remain there for about a month after the last time the light flashed.

Jul 19, 2015 | 10:59 AM

alloro

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Quote:

Originally Posted by Skauber

You can try FORScan with a bluetooth ODB scanner, it can read codes from all modules, including transmission codes.

You sure about this? All I can find is that it will display the tranny temperature, and nothing about trouble codes.

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Jul 19, 2015 | 11:34 AM

Skauber

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Quote:

Originally Posted by alloro

You sure about this? All I can find is that it will display the tranny temperature, and nothing about trouble codes.

Yep, it reads fault codes from all modules. I'm using it with a OBDLink MX, the cheaper China bluetooth dongles needs some modification in order to access the MS CAN network, but the OBDLink MX works perfectly out of the box on all networks. I've used it to finally pinpoint my U1900 intermittent error, which it shows is being set by the instrument cluster. If you check the log, it shows all detected modules, VSM, PCM, IC, and so on. It's quite frankly an immensly powerful and awesome app/software which is almost free (5 bucks on Android, but well worth it, free on Windows). It gives a proper diagnostic tool to the common DIYer for about 100 bucks if you go for the OBDLink, 20 bucks if you go for a China bluetooth OBD.. I have a Ford VCM, but I actually use the FORScan app more, as a first line diagnostic tool. Just plug it in and have a quick check. On a laptop I can run self tests for most, control the PCM inputs and outputs, and even program PATS keys. I only break out the VCM if I need to do power balance and more in depth stuff.. hehe..