Transmission control button question
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Joined: Apr 2004
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Transmission control button question
I just bought a 1998 4x4 F350 reg. cab long bed with a power stroke turbo diesel (not a dually). It has 108000 miles but, of course being a diesel, runs strong. New tires were in order and being a novious off road enthusist, I decided to get new wheels and 33, 12.50s. All was good. Then 2 days ago the Transmission control button began to flash OFF in the pattern so often described in other forums. The shift was extremely harsh. I read all I could and decided to disconnect the batteries and see if it resets. This operation seemed to work but taking the truck to get some diagnostic checks seems prudent.
My question is this: Do larger tires negate the computers ability to detect normal transmission load, thus requiring the transmission to acclimate itself to a different parameter?-- in other words the reset fixed the problem. Or does the "OFF flash" normally indicate a transmission malfunction that requires some larger magnitude of repair?
My question is this: Do larger tires negate the computers ability to detect normal transmission load, thus requiring the transmission to acclimate itself to a different parameter?-- in other words the reset fixed the problem. Or does the "OFF flash" normally indicate a transmission malfunction that requires some larger magnitude of repair?
Posting Guru
Joined: Feb 2004
Posts: 2,248
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From: Elverson, PA
The 33's shouldn't have any effect on your tranny - unless there was something wrong with it already. While resetting the computer may have solved the problem - I would highly doubt (though possible) that it will last. Personally I would get the tranny checked out - better safe than sorry and finding a problem now my save you $$ on repairs.
Junior User
Joined: Aug 2003
Posts: 96
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From: South Carolina
Could be speed sensor going out
I don't know if the location is the same on the '98 but the Tow switch will flash for several trouble codes. One is a faulty speed sensor which is what the computer uses to judge shift points. The dealer can also adjust the program for the larger tire size so that the tranny will shift correctly.
Scott
Scott
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