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  #1  
Old 10-28-2009, 01:34 PM
Paul
 
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Default Overdrive Light Blinking

Request assistance on some ideas that would help me locate the problem that cause my 1999 XLT, 4 Liter, 4x4, overdrive light to blink after the vehicle is at temp. There are no conditon codes using my OBII Scane Tool. The light will reset after the vehicle is shut down and restarted. I just changed the fluid and filter, but no change. Can anyone assist???
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  #2  
Old 10-28-2009, 02:01 PM
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Have to go to a transmission shop and have them read the transmission code its not a code that you can pull at autozone or ur self using a OBDII reader
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  #3  
Old 10-28-2009, 03:23 PM
Paul
 
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thanks! I will get that done and let you know how I do. Hope for the best.
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  #4  
Old 10-28-2009, 03:25 PM
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When driving does the truck shift normal or any noticeable sounds while shifting?

May just be something pretty simple
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  #5  
Old 10-29-2009, 03:53 AM
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Is the OD actually engaging properly?
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  #6  
Old 10-29-2009, 12:08 PM
Paul
 
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Got the truck checked and the code is 0741 (Torque Converter Clutch Cicuit Performance or Stuck Off) and no the OD is not working as soon as the light comes on, shifts rough. Im thinking that the transmission is trying to save it-self and going into the limp mode.
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  #7  
Old 10-29-2009, 12:10 PM
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Quote:
...and no the OD is not working as soon as the light comes on, shifts rough. Im thinking that the transmission is trying to save it-self and going into the limp mode.
See, this is exactly the sort of information that should have been in your initial post, to help with the diagnosis in the first place.
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  #8  
Old 10-29-2009, 12:46 PM
Paul
 
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Quote:
Originally Posted by turbo View Post
See, this is exactly the sort of information that should have been in your initial post, to help with the diagnosis in the first place.
What dose that mean???
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  #9  
Old 10-29-2009, 12:49 PM
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Originally Posted by vangorderpau View Post
What dose that mean???
"no the OD is not working as soon as the light comes on, shifts rough"

Giving that type of info could have been helpful to help you out of what to do


Did the transmission shop tell what the fix is?
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  #10  
Old 10-29-2009, 02:24 PM
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a while ago my 99 4x4 4.0L over drive light was blinking, took it to a tranny shop, it was the valve body $1200 fix
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Last edited by big green; 10-29-2009 at 02:27 PM.
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  #11  
Old 10-29-2009, 02:25 PM
Paul
 
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Yes, Like any other shop would say, the transmission needs to be rebuilt with a possible new Torque Converter. I have been checking out diffrent web sites (F250, explorer and others), which had same problems and the fixes range from replacing the transmissions, valve bodies w/gaskets, speed sensors, and the last one that caught my attenetion was the TTC selniod. I'm hoping I can get some good pointers from here!
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  #12  
Old 10-29-2009, 02:30 PM
Paul
 
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Quote:
Originally Posted by big green View Post
a while ago my 99 4x4 4.oL over drive light was blinking, took it to a tranny shop, it was the valve body $1200 fix
How did they determine it was the valve body and not the transmission. Did you have the same condition code P0741?
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  #13  
Old 02-20-2010, 01:25 PM
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I have a 95 4x4 4.0 ranger auto and my od light is blinking. The trany shifts fine but it stalls when the car comes into a complete stop. Would like some info if any body has had the same problem. Really would appreciate the help thanks.
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  #14  
Old 02-26-2011, 01:46 PM
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Unhappy Re: Overdrive Light Blinking

I have a '99 4x4 Supercab with 4.0 liter. After reading this thread and a ton (hundreds) of similar Ford Explorer threads (looks like they use the same tranny), it appears that this is a major problem of which Ford is well-aware but does not want to acknowledge. There is something very wrong with this tranny to have the same problem for so many folks over so many model years. One poster stated that it is a defective design problem and Ford actually has a fix in some cases where it believes it is powertrain contol module (PCM) that is the culprit. If you cannot re-program the PCM, you have to buy an upgraded one from Ford at about 3 times the cost of re-programming.

Also, some folks have cured the problem by disconnecting the battery for 5-10 minutes. That will cause your onboard electronics to reset. I used this method when the "check engine" light would come on for no apparent reason. It would be good for about a year at a time, then. No codes would show, so no one could do anymore than guess at what could be causing light to come on.

Basically, the problem may be that Ford' PCM set the tolerances too tight and the engine is getting thrown into "limp-home" mode when the tranny goes out of tolerance, or it could be a valve body or gasket design problem that you can find if you pull the tranny pan and change the filter and fluid. Body valve repair estimates I have seen from posters are from $250 to $1200. Not sure why the big difference in cost.

On my '99, I have tried the battery disconnect and it did not work the first time. I may have to leave it disconnected for longer than I did. If it works, I will let you know. Otherwise, guess I will be taking it to dealership or repair shope to see if they can pull any codes off tranny since posts here suggest that lot of shops and Auto Zone code reading equipment cannot pull tranny codes properly.

Funniest part is everything was fine Thursday evening when I parked truck after driving it all day, but Friday morning about 3 miles from house the o/d light started blinking and tranny started acting funny.

I had had the tranny fluid and filter changed not that many miles ago and less than a year back, but when I checked the tranny fluid this morning it was down a full quart! No noticeable leaks. Just had it in 3 weeks ago for oil change service and they did not note any low tranny fluid level, either, when they did multi-point fluids inspection, plus annual state emission inspection passed with flying colors at same time.

Have 165,000 miles on this truck, and it otherwise has been running great. Drove it over 500 miles two weeks ago on day-trip without incident. Guess that is why this is so darn perplexing since there was no warning of any problem that I could tell.

I will update as soon as somebody smarter than I am can come up with an explanation that actually diagnoses and then allows a permanent fix to the problem.

But, I think Ford needs to really consider a recall here and a free fix for everyone. Too many people with same problem for it to be mere coincidence. I think Ford knows exactly what the problem is and they may even fix it for free if you complain enough to a dealership and demand a free fix. They regularly have "silent" recalls at Ford for stuff like this -- they don't tell consumers, but they tell the dealerships to fix if the customer complains loud enough and often enough and refuses to pay for fix. I may try that route if it looks like it is going to cost me more than a couple of hundred dollars to fix this. If I succeed, I shall certainly let everyone know.
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  #15  
Old 02-26-2011, 02:15 PM
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Default Re: Overdrive Light Blinking

You have alot of the information correct. One thing that should never be done however, is to believe everything you see in a Google search. Out of the 400,000 posts on Google about Ford auto transmissions, how many are positive posts praising their transmissions for being the best in the world? How many people get on internet forums just to talk about how good a specific component on their vehicle is? Not many at all. And how many Ranger/Explorers were built? 400,000 problems out of all the Rangers/Explorers built is still a very small number. I do agree that Ford should recognize the problems with the Auto trans, but in the end, Ford has never put a stout auto trans in the Ranger since they brought out the A4LD. Ford auto transmissions from the 90's are extremely finicky, and must have regular maintenance performed to ensure maximum life. If you neglect the required maintenance, then you really have no valid reason to complain about the trans. The factory gives you that little book with all the info and the maintenance schedule for a reason. 3/4 of the complaints on Google are most likely invalid, since at least one of the owners in the affected vehicle's lifetime have neglected the maintenance on the vehicle. I have seen many cases where vehicles with proper maintenance have made it to 300,000+ miles. It requires a strict maintenance schedule, something most owners refuse to stick to.

As for solving these resulting problems, it's extremely hard to do. Transmission techs are only trained on fixing transmissions in general, not for knowing each and every defunct a specific transmission has. This is why the prices for repairs vary so much. The lower prices tend to reflect the high knowledge of the trans shop. The higher price is usually due to the fact that the trans shop is unsure of the exact problem, and is simply throwing parts at the trans. Ford Ranger/Explorer Autos can have many problems, including those you mentioned earlier, as well as wiring problems, and mechanical parts failures. It is impossible to guess on which is right, since there are so many possible causes. Therefore it is important to have the code read, and study the conditions in which the O/D Light comes on, as these are the only ways to really diagnose the actual problem.
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