Overdrive light flashing! ON/OFF - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 36 (permalink) Old 06-13-2009, 06:08 AM Thread Starter
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Overdrive light flashing! ON/OFF

Just bought the truck and began mods. When I drove the 1st time I checked the O/D button and it worked. Pick the truck up today and notice O/D button light flashing. Everything seems to be working, shifts into every gear hard but it has a reman Ford tranny w/shift kit. Lock-up seems to be working. Disengages when let off. But also downshifts at around 1300rpm like tow mode. Checked other threads and found some simular but not right. Shifter is lose, could that be it? Please any info is apreciated.

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post #2 of 36 (permalink) Old 06-13-2009, 06:21 AM
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Re: Overdrive light flashing! ON/OFF

Flashing od you have some tranny codes that need to be pulled.Other than that you are throwing a dart at the board.Could be allot of things.
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post #3 of 36 (permalink) Old 06-13-2009, 08:45 AM
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Re: Overdrive light flashing! ON/OFF

Pull the codes

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post #4 of 36 (permalink) Old 06-13-2009, 12:29 PM Thread Starter
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Re: Overdrive light flashing! ON/OFF

I don't have a scan tool, or have access to 1, and the shops around here have a $75 min so the codes may come after a bit. Is there any simple eye-ball checks I could do?

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post #5 of 36 (permalink) Old 06-13-2009, 02:24 PM
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Re: Overdrive light flashing! ON/OFF

uh, i dont think so, it could be a number of things that could be internal you wouldnt be able to check till the trans would be out. Really just best off pulling the code, otherwise its really a huge guessing game, especially when the trans isnt doing something obvious to point you twords what wrong...

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post #6 of 36 (permalink) Old 06-14-2009, 03:44 PM
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Re: Overdrive light flashing! ON/OFF

Quote:
Originally Posted by 1800joedaddy View Post
I don't have a scan tool, or have access to 1, and the shops around here have a $75 min so the codes may come after a bit. Is there any simple eye-ball checks I could do?
The only thing you can do without codes is make sure that every connection in the truck is plugged in and each pin is clean, not bent or corroded. There are so many ways that a problem can occur that will flash the OD light and store a code that there is really no way to diagnose what's wrong without the code.

Bite the bullet and get the codes read. It will be cheaper and faster than trying to fix this without the codes. And if you just ignore it, there's a good chance you'll be buying a new trans soon. Ignoring a minor problem in a trans often turns into a dead trans.
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post #7 of 36 (permalink) Old 06-14-2009, 04:09 PM
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Re: Overdrive light flashing! ON/OFF

go to autozone or advanced auto or maybe some others but i know those two will pull codes for free hoping you will buy the parts from them
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post #8 of 36 (permalink) Old 06-14-2009, 04:27 PM Thread Starter
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Re: Overdrive light flashing! ON/OFF

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go to autozone or advanced auto or maybe some others but i know those two will pull codes for free hoping you will buy the parts from them
Never thought of that Auto Zone owes me, they'd asking for a bail-out if it weren't for the dozens of times I visit them per week

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post #9 of 36 (permalink) Old 06-14-2009, 07:12 PM Thread Starter
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Re: Overdrive light flashing! ON/OFF

OK I fixed it... Almost. I was doing some finish welds on the exh and unhooked the battery. WALAH! no flashing light. Something else, yesterday I was pulling my trailer (6000lb) and the shifts seemed a little harsh. That went away as well. I'm starting to think this had a flash installed or something and that might have affected it? I'm definately going to have it looked at if it comes back.

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post #10 of 36 (permalink) Old 06-14-2009, 09:36 PM
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Re: Overdrive light flashing! ON/OFF

I know that in my 97 that I had the OD light was flashing, and it was shifting firmer than usual and it wound up being the TC. It was slipping a little bit and the trans had a fail safe in it where when the TC slipped it would bump the line pressure up and make it shift firmer on its own, to spare the tranny. It would come on sometimes and then it would go away. It finally stayed flashing one time and then it went to the tranny shop.

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