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O/D light shifting issue

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  #1  
Old 07-23-2018
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O/D light shifting issue

i realize there is alot out there on this but im hoping for some tips on my personal situation. I just got an automatic 2005 2wd with a 2.3 l. 128,000 miles. My od light flashes after driving it for a half hour or so. Trans shifts rather hard and slips a little when it comes on. No idea how long this has been happening as i just got it. Seems to me from what i have read i should figure out the code that comes up. But i plugged it in and nothing popped up. Does it have to be plugged in while the light is blinking to get it? Or does it need to be plugged in at a shop or a ford dealership perhaps? Could a simple filter/fluid change help at all? Looking for any input out there, this issue is driving me nuts. Thanks
 

Last edited by Alek; 07-23-2018 at 07:02 AM. Reason: Forgot to mention auto tranny
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Old 07-23-2018
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Welcome to the forum

Yes, there will be a transmission code in memory, P07XX, 700's are transmission codes
Many OBD readers do not read 700's look up yours online to see if it should, could just need a software update.

Yes, when OD light flashes computer has switch over to "Safe mode" for transmission shifts, when means clutches and bands(brakes) do not slowly engage and disengage, so no smooth shifting, yes, this is "safer" because less chance of burning out clutches or bands.

Once you get the code you can decide if changing fluid would help

You have a 5R44E automatic trans


About ANY trouble codes:
They DO NOT MEAN what most think they mean, lol, I know what good are they then?
Computer has several codes to choose from for the same part or system
So the codes it DOES NOT CHOOSE, are as important as the code it does choose to use
So never Google a code number
Look up the code on a FULL LIST of codes, like this list: OBD-II Trouble Codes
 
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Old 07-23-2018
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Ill respond asap

ok cool thanks. Im about to schedule an inspection apt. So it should come up on theirs correct? Ill respond as soon as i get word ... Hoping it all works out.
 
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Old 07-23-2018
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See if they will give you the exact code or codes


Transmission shops are NOT "ripoffs" for the most part, but same with all professions there are good guys and bad guys, lol.
 
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Old 07-23-2018
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Right?

haha understandable. My family has dealt with this guy forever so it should be cool. Will the code come up if the lights not on though? This shop is only like five minutes away
 
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Old 07-23-2018
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Got it now. My bad!
 
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Old 07-23-2018
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Should know whats up tomorrow by 9am. Assuming he will be decent. But i just took it to the store quick, which is about a 4-5 mile round trip. Light kicked on about 1.5 miles from home. Does it make sense that it seems to keep happening sooner and sooner?
 
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Old 07-23-2018
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So its only the 3100a and from what I'm reading it doesn't read many tranny codes. Unless the vehicle has enhanced dtc somethin or other. So im hoping to figure something out tomorrow...
 
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Old 07-24-2018
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Well ... No codes came up. Scanned it twice with two different scanners. Now what? See what the dealership has to say maybe?
 
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Old 07-24-2018
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Very odd

Since the Flashing only occurs after warm up, fluid thins out, could be pressure leaks in valve body.
So changing fluid and filter could help
There are additives that swell gaskets and seals to help hold pressure
 
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Old 07-24-2018
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Ok. So that'd be a fairest first attempt at solving this issue ay? Ill start there. Thanks!
 
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Old 07-24-2018
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Could you reccomend additives? This is totally new to me
 
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Old 07-24-2018
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Im seeing the additives are all pretty evenly priced. But is there a chance that high mileage fluid may help more than regular? Trust any certain brands over others?
 
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Old 07-24-2018
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Also ... If not, which type fluid would i want? and how much? peoples posts seem to vary on both type & quantity. Looking to go at this in the a.m
 
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Old 07-24-2018
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I like Lucas brands
 
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Old 07-24-2018
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Got a second opinion. 4 codes! Po733 po735 po741 p1783
 
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Old 07-25-2018
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I searched the codes. Seems pretty problematic. Not sure where to go with this now
 
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Old 07-25-2018
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You should post definitions with the codes since you already looked them up, lol

P0733 Gear 3 Incorrect ratio
P0735 Gear 5 Incorrect ratio
P0741 Torque Converter Clutch Circuit Performance or Stuck Off
P1783 Tran Overtemp Condition

Transmission is slipping, thats the Incorrect ratio codes, and the overtemp codes, slipping cause Heat

Computer has a turbine shaft speed sensor, basically engine RPMs, IF torque converter is LOCKED, if its not locked then this sensor would show less RPMs than engine RPMs
From looking at the other torque converter codes computer could have used you know the wiring is OK or it would have set circuit malfunction codes, 740, 743 or 744
So torque converter is not Locking, problem in valve or fluid pathway

Incorrect ratio is determined by Turbine RPMs and Output shaft sensor RPMs(vehicle speed sensor, OSS)
Computer compares the two RPMs to determine the ratio between them so knows what Gear it is in.

These could all be Valve Body issues, leaks, not solenoid issues because there are no "circuit malfunction" codes
Clutches and brakes(bands) are not getting correct pressures from valve body so "gear selection" is not working like it should.

Trans fluid additive might help for a bit, but..............

New valve body can be installed without pulling the transmission.
But be aware that any previous slipping will have worn down clutches and brakes, which can only be changed by full rebuild.
So it isn't as simple as new valve body solving the problem, transmission will need to be rebuilt at some point in the future, an automatic's clutches and brakes DO wear out normally, just like the tires and brakes on the outside.
 

Last edited by RonD; 07-27-2018 at 10:06 AM.
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Old 07-25-2018
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Sorry i figured you would know what the codes were saying. Im going to call the dude i bought it from and see if he knows how long this has been going on to see how severe the damage may potentially be. But this issue was never stated previously so im pretty sure he will deny knowing anything of it. Ill re post after contact with him to see which path you think may be the best to take. Thank you !
 
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Old 07-27-2018
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Not hearing anything from him. So would you personally just jump to the rebuild rather than valve body?
 
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Old 07-27-2018
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No one can memorize that many codes, lol

A new valve body can be used with full rebuild, so not a waste of money, just the time it takes to change it

But..........if seller had transmission issues a new valve body may already be in there...........

The P1783 Tran Overtemp Condition would lean me towards the full rebuild
These transmissions also need a new FORD pump, not 3rd party, and always a new forward one way clutch, many shops only replace bands and "gear" clutches

Also spend the $60 on a second trans cooler, they add many miles to any vehicles automatic trans.
 
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Old 07-28-2018
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Ha right? Thanks for the help man!
 
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Old 2 Weeks Ago
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Ok so I'm looking at used trannys. Mine is '05. What range of 2.3l years could bolt up?
 
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Old 2 Weeks Ago
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Late 2001 2.3l Ranger to 2011 2.3l Ranger, or 2002 Mazda B2300 to 2009

All were 2WD

1997 and earlier were 2.3l Lima engines so trans won't fit the 2.3l Duratec
 
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Old 1 Week Ago
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Thanks again!
 
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