Overdrive light flashing when decelerating
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Overdrive light flashing when decelerating
My 4x4 1993 F250 overdrive light flashes when I let off the accelerator pedal and stops flashing when I accelerate. I believe it is an AOD. Any ideas anyone? Thanks.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
The F250 and F350 never came with an AOD from the factory. Yours is an E4OD.
Your best bet is to check for codes: Fuel Injection Technical Library » How To Run a Self-Test
Or purchase one of these to display codes: Equus 3145
Your best bet is to check for codes: Fuel Injection Technical Library » How To Run a Self-Test
Or purchase one of these to display codes: Equus 3145
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Thank you. I had a strong suspicion that it was an E40D.
I did take the pickup down to the local parts store and had them run their diagnostic scanner which couldn't seem to pull anything from the port.
I did take the pickup down to the local parts store and had them run their diagnostic scanner which couldn't seem to pull anything from the port.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
Clean the pins in the connector. Use some contact cleaner. Sometimes you have to get a little more aggressive, I use a small screwdriver from time to time.
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The tach does go dead at idle.
I don't know if it is related but when I step down hard on the accelerator pedal to pass or climb a hill while O/D is on, the transmission downshifts too low and tachs-out without upshifting. It will only upshift if I turn off the O/D.
I don't know if it is related but when I step down hard on the accelerator pedal to pass or climb a hill while O/D is on, the transmission downshifts too low and tachs-out without upshifting. It will only upshift if I turn off the O/D.
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