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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Weird problem with OD

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Old Dec 6, 2025 | 02:05 PM
  #1  
Riggsre's Avatar
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Weird problem with OD

1997 F-350 CCLB Duelly 7.3 automatic.
When driving on the highway at random times (not triggered by a bump or anything) the cruise will cut off, the trans will fall out of OD, and about a second later the OD off light will begin flashing. Here's the weird part: switching the fuel tank from front to rear then back to front fixes it. The problem may not re occur for hours or even days.
 

Last edited by Riggsre; Dec 6, 2025 at 02:07 PM. Reason: Spelling
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Old Dec 6, 2025 | 07:37 PM
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The OD light is flashing so what fault code are you getting?
 
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Old Dec 6, 2025 | 07:48 PM
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The first step is to read the codes. Anything else is just guessing.
 
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