e4od problems help!

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Mar 16, 2015 | 09:23 PM

bluethundersowner

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From: WI

e4od problems help!

I have a 97 with a ts chip and e4od trans. My trans began slipping and I had it built by a local guy. Triple disk converter and suncoast internals. Sometimes when I'm on the highway and go over quarter throttle the overdrive light will start flashing and it shows a p1728 transmission slip fault code. The thing is the transmission isn't slipping. I'm wondering if I have to get my chip retuned for having the triple disk converter? When the light is flashing the converter stays locked when I try to stop. Once I give it a little throttle it will unlock. If the lights flashing and I go into reverse sometimes the converter locks and the truck stalls. If I drive the truck with less than 1/4 throttle it doesn't act up.

Mar 16, 2015 | 09:27 PM

Mark Kovalsky

Frmr Ford Trans Engr

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From: SE Florida

The transmission IS slipping. It only has to slip 50 RPM to set the code. You can't feel a 50 RPM slip.

Mar 16, 2015 | 09:28 PM

fordpride

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From: Livoina,La

I don't think it would be the chip but you could pull it and see if it stops. Sounds like a bad converter to me but I'm not a tranny expert.

Mark will chin in soon I'm sure

Mar 17, 2015 | 08:19 PM

bluethundersowner

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From: WI

Quote:

Originally Posted by Mark Kovalsky

The transmission IS slipping. It only has to slip 50 RPM to set the code. You can't feel a 50 RPM slip.

If it is slipping than how can I fix it? It does it in every tune if I go over quarter throttle.

Mar 18, 2015 | 07:38 AM

fordpride

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From: Livoina,La

Have you pulled the chip to see if it stops ?

Mar 18, 2015 | 08:36 AM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,703

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From: SE Florida

Quote:

Originally Posted by bluethundersowner

If it is slipping than how can I fix it? It does it in every tune if I go over quarter throttle.

The first thing to do is to remove the chip and see if it stops. If it does then the chip is the problem.

If not, remove the access plate to the bellhousing. Look at the front face of the torque converter. If the steel is discolored from heat then the torque converter has failed and needs to be replaced. If not, then it is an internal transmission failure.