overdrive light flashing, why?
Freshman User
Joined: Nov 2002
Posts: 34
Likes: 0
From: Huntingdon USA
overdrive light flashing, why?
My my 99 f-250psd just did this this morning on my way to work, i pulled over and let it sit for a little bit and then restarted it
the light didn't come back on, so does this mean that all is well now? From what everyone has posted, if the light came back on when i restarted it, I should be worried, but since it stayed off, does this mean things are okay?
I am still going to autozone after work and see if they can read it.
anyway, I am new to the board and looking forward to posting here :-)
the light didn't come back on, so does this mean that all is well now? From what everyone has posted, if the light came back on when i restarted it, I should be worried, but since it stayed off, does this mean things are okay?
I am still going to autozone after work and see if they can read it.
anyway, I am new to the board and looking forward to posting here :-)
New User
Joined: Oct 2002
Posts: 12
Likes: 0
overdrive light flashing, why?
I have a 2003 F350psd 4x4 crew cab and I pull a 10,000 pound 5th wheel RV. Just after my 1000 mile break-in, while pulling the RV in hilly terrain, my overdrive light started flashing. I pulled over and after cooling down the turbo, I shut the engine down and turned the ignition off. After re-start, the light was gone and I have not seen it flash again. I have pulled the RV many times since then and have had no trouble or flashing light. But, I have also not been on that hilly route again.
My thoughts:
When it happened, I was pulling in overdrive (which is usually fine for flat terrain) and the computer was automatically taking me out of overdrive several times to negotiate the hills. It seems that my computer finally took over because of this and decided that, due to the strain of trying to get up those hills with 10,000 lbs., it was gonna force me to stay out of overdrive so there would be more power and it would also run cooler(transmission). Although my guage did not indicate that I was hot. This is all I can come up with that half-way makes any sense to me. Any critique?
John
My thoughts:
When it happened, I was pulling in overdrive (which is usually fine for flat terrain) and the computer was automatically taking me out of overdrive several times to negotiate the hills. It seems that my computer finally took over because of this and decided that, due to the strain of trying to get up those hills with 10,000 lbs., it was gonna force me to stay out of overdrive so there would be more power and it would also run cooler(transmission). Although my guage did not indicate that I was hot. This is all I can come up with that half-way makes any sense to me. Any critique?
John
Thread Starter
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New User
Joined: Nov 2002
Posts: 7
Likes: 0
overdrive light flashing, why?
John,
Funny you mention this about pulling a trailer. I have a small compared to yours, trailer that I pull around a few pieces of lawn equipment with and since it has been cold here in PA I have not needed any lawn equipment and the light has not been on. I wonder? time will tell.
Bigdog02,
Let us know if your autozone does anything for you, mine would not. Let us know what they find, if anything
Ken
Funny you mention this about pulling a trailer. I have a small compared to yours, trailer that I pull around a few pieces of lawn equipment with and since it has been cold here in PA I have not needed any lawn equipment and the light has not been on. I wonder? time will tell.
Bigdog02,
Let us know if your autozone does anything for you, mine would not. Let us know what they find, if anything
Ken
Freshman User
Joined: Nov 2002
Posts: 34
Likes: 0
From: Huntingdon USA
overdrive light flashing, why?
well i went to the autozone here in huntingdon, thinking they wouldn't be able to do anything and got a guy that had actually owned a 98 f-250 diesel, and knew what i was talking about.
He wasn't sure if the code reader would be able to read my truck, for some reason he explained the transmission in the 99 is somehow different, from earlier and later models, but he would try it anyway. He hooked it up and no codes even came up, sop he cleared it anyway, but no codes showed up at all.
His suggestion once i told him the history of the truck (30,000 miles on it now, bought it with 22,000 miles on it, the guy that had it before me only used it for towing a 5th wheel camper)anyway once he heard the history he suggested that I check the tranny fluid and most likely change it, since it did pull a good bit of weight for the first part of it life, and maybe the guy that had it had no idea how to drive with a trailer on and beat the tranny pretty hard without knowing what he was doing.
He said if the tranny fluid was clean, then his best guess.........computer went stupid for a little bit, like some of the people said in earlier posts.
He wasn't sure if the code reader would be able to read my truck, for some reason he explained the transmission in the 99 is somehow different, from earlier and later models, but he would try it anyway. He hooked it up and no codes even came up, sop he cleared it anyway, but no codes showed up at all.
His suggestion once i told him the history of the truck (30,000 miles on it now, bought it with 22,000 miles on it, the guy that had it before me only used it for towing a 5th wheel camper)anyway once he heard the history he suggested that I check the tranny fluid and most likely change it, since it did pull a good bit of weight for the first part of it life, and maybe the guy that had it had no idea how to drive with a trailer on and beat the tranny pretty hard without knowing what he was doing.
He said if the tranny fluid was clean, then his best guess.........computer went stupid for a little bit, like some of the people said in earlier posts.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
Likes: 2,669
From: SE Florida
overdrive light flashing, why?
Before pulling the pan read the article I wrote in the Tech Articles section on changing the transmission fluid.
If you only drop the pan you will only change about 1/3 of the fluid.
If you only drop the pan you will only change about 1/3 of the fluid.
New User
Joined: Dec 2002
Posts: 9
Likes: 0
From: Grants Pass USA
overdrive light flashing, why?
When the light is flashing, the computer has detected a "fault" in the trans., causing it it go into a Manual emergency mode. Just disconnect the Batteries for 60 seconds and the computer will reset itself and the trans. will work properly. If the light continues to blink, you have a trans. problem.Been there & done that.
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Freshman User
Joined: Oct 2002
Posts: 27
Likes: 0
From: garland usa
overdrive light flashing, why?
>If you want to firm up the shifts inexpensively, add a
>Sonnax valve and Tricumulator springs. The parts only cost
>about $40, and the shifts are nice and firm.
>
>Quadzilla
>'95 F-350XLT Crew Cab SRW 4X4 PSD, 35X12.50X16.5's, Limited
>slip 4.10's, Hypermax downpipe, gutted EBPV, "Catless" in
>Seattle, "Renegade" 4" exhaust system, CTFD sticker, Air
>bags, TYMAR intake, shimmed fpr, Diablo Delta chip, Fumoto
>valve, Autometer pyrometer, Sonnax valve, Tricumulator
>springs, Tru-Cool, HX mod, Magnefine tranny filter, 4R100
>pan.
>And a wish list that gets longer every day.
>(Thank God for a wife that likes big trucks.)
>For pictures, click here:
>http://community.webshots.com/user/quadzilla100
maggie goodwrech watching over tha beer!!!!
>Sonnax valve and Tricumulator springs. The parts only cost
>about $40, and the shifts are nice and firm.
>
>Quadzilla
>'95 F-350XLT Crew Cab SRW 4X4 PSD, 35X12.50X16.5's, Limited
>slip 4.10's, Hypermax downpipe, gutted EBPV, "Catless" in
>Seattle, "Renegade" 4" exhaust system, CTFD sticker, Air
>bags, TYMAR intake, shimmed fpr, Diablo Delta chip, Fumoto
>valve, Autometer pyrometer, Sonnax valve, Tricumulator
>springs, Tru-Cool, HX mod, Magnefine tranny filter, 4R100
>pan.
>And a wish list that gets longer every day.
>(Thank God for a wife that likes big trucks.)
>For pictures, click here:
>http://community.webshots.com/user/quadzilla100
maggie goodwrech watching over tha beer!!!!
New User
Joined: Jan 2013
Posts: 6
Likes: 0
From: Valdosta, ga
1990 od light
My 1990 f250 od off light started flashing and hasn't quit. I tried disconnecting hart cable but it still is flashing. It wasn't on when I shut it off the other day just came on the next morning. I can not find a test connection under the hood. it suppose to be drivers side. ?????
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
My 1990 f250 od off light started flashing and hasn't quit. I tried disconnecting hart cable but it still is flashing. It wasn't on when I shut it off the other day just came on the next morning. I can not find a test connection under the hood. it suppose to be drivers side. ?????
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Here's the earlier F series forum 1987 - 1996 F150 & Larger F-Series Trucks - Ford Truck Enthusiasts Forums
Here's the motor specific forum if you have an IDI Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - Ford Truck Enthusiasts Forums
Here's the motor specific forum if you have an IDI Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - Ford Truck Enthusiasts Forums