Transmission question.
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Freshman User
Joined: Oct 2013
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Transmission question.
Just got my truck back today from the shop the guy had it for about four weeks it had a complete new a/c system on it and when I picked it up it shifted hard from first to second maybe second to third and was running higher rpms than before plus the od light was blinking. Other than that truck ran great. No tranny problems before this ever and fluid was good clean and not burned. Please help. He did unhook the batteries because he replaced front cover seal also.
Fleet Mechanic
Joined: Jan 2012
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If the or light was blinking there should be a code stored. Maybe something got unplugged or knocked loose during the work. Unhooking the batteries shouldn't cause the light to blink though it does go though a relearn after they are reconnected. Also year model and engine info would help. I think I would be taking it back to the place you had the work done if the light continues to blink and is shifting hard. Maybe they have a scanner that can see trans codes.
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Freshman User
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I have spent over 7000 in a month on this thing just in the motor with a rebuilt engine with sinister diesel products afm intake garret turbo egr delete kit new radiator a/c system with all new dryer and lines new batteries banks 6gun tuner exhaust arp head bolts black diamond gaskets new starter aftermarket injectors I mean its a beast and now this. Everything in the truck is been replaced but the alternator and transmission. Even has new rearend. And all new Ujoints new hubs. New sound system with backup camera Lift kit shocks tires wheels I mean I've spent a small fortune on this thing and since it's my dream truck it kills me to know its going right back into the shop so any input from you guys would be great
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,698
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From: SE Florida
The flashing OD light means SOMETHING is wrong with the transmission system. It also means that a code has been stored to tell what's wrong. Without the code nobody knows what's wrong with it. If you ignore this for a couple weeks whatever is wrong has the potential to DESTROY your transmission.
The auto parts stores that read codes free cannot read these codes. You need to pay someone to read them.
My SWAG* is that an electrical connector was left unplugged after the previous work. With the code I could tell you which one, without the code I have no idea.
*SWAG = Silly Wild Guess
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From: baja
Just got my truck back today from the shop the guy had it for about four weeks it had a complete new a/c system on it and when I picked it up it shifted hard from first to second maybe second to third and was running higher rpms than before plus the od light was blinking. Other than that truck ran great. No tranny problems before this ever and fluid was good clean and not burned. Please help. He did unhook the batteries because he replaced front cover seal also.
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Laughing Gas
Joined: Sep 2005
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That is the worst advice possible. A flashing OD light means you have transmission codes. If the guy who did the work can't read the code you will likely have to go to a transmission shop. It could be something as simple as an unplugged connection, pinched wire or there could be something else wrong. You don't know until you scan the code.
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Freshman User
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Ok so went to tranny shop today and of course the truck ran great with no od light blinking. He ran the scan and it was po 730 incorrect gear ratio and p2703 trans friction element d time range performance He reset it and added a qt of fluid since it was a qt low. Truck is running great now. He thinks it was because the truck sat with the batteries unhooked for so long. But if it starts again we will go from there.
Elder User
Joined: Nov 2012
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From: Onlsow, NC
Maybe. The computer does learn from your driving habits and will adjust the transmission shift points and shift pressures accordingly. However, if the O/D light is blinking there is something wrong. I've had my O/D light flash at me a few times because when i shifted into drive from reverse, the selector lever didn't go all the way into drive. The transmission shifted and i drove off no problem, then noticed the light and realized what i did.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,698
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From: SE Florida
The computer DOES NOT learn from your driving habits. That's an old myth that just will not die.
The computer DOES learn how long each shift takes from when the computer commands the shift until it measures that the shift has completed. It then adjusts the pressure for the next time it makes that shift.
I doubt that this would happen from sitting. It could happen from being a quart low.
The computer DOES learn how long each shift takes from when the computer commands the shift until it measures that the shift has completed. It then adjusts the pressure for the next time it makes that shift.
I doubt that this would happen from sitting. It could happen from being a quart low.
Elder User
Joined: Nov 2012
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From: Onlsow, NC
Interesting. The owners manual from my F-150 explained that the transmission adjusts according to your driving habits. i don't remember the exact wording as that truck is long gone, but that's probably where that rumor comes from. But one thing that was explained was the transmission will have to re adjust according to the driver if the battery is disconnected or replaced.
Laughing Gas
Joined: Sep 2005
Posts: 984
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Those codes usually go along with a slipping transmission. That could be do to low fluid level. A quart shouldn't be all that much issue though. If you get the light back on and the same codes then you know it's slipping and needs some attention.