I thought it was "scientific wild _ _ _ guess"

 

I am not sure if their code readers will tell if its the converter or not. The easiest way to tell is to find a long steady grade, freeway entrance ramp, etc. Under a slightly faster than normal acceleration, does the rpm gauge rise a few hundred if you let off just a bit that back into it? You cant let off completley , or it will kick converter cout, you just have to let off a tad, then back into the throttle. If the rpms vary, its your converter lockup. If you replace it, do like I did. Scarp the piece of crap tranny cooler in the fron of the truck and get yourself a real one. About 60 bucks here at our speedshop. Then go to autozone and grap a convereter. I think mine was about 285 bucks. Slap it in takes about 4 hours if your inclined from start to finish. Drive it like it owes you money. A lot of guys swear by the 700 dollar converters. But I dont think its needed if you have a good cooler. I have put about 50k on my converter, and thats loaded with 10,000 pounds PLUS 95 percent of the time. Never had one issue, and my tranny stays about 165 in the winter, and 180 in the summer. Hope this helps.

 

Yes, we called randomly throwing parts at a problem Easter-egging when I was in the Navy. That said, my ABS is working again, the speedo is working again below 20 mph, and the OD light flashing (turning OFF) is fixed - all caused from the faulty VSS. I got one for less than $25 at Ford, spent about 30 minutes installing it, and my truck is like new again - Thanks for the help!!!!!

 

I Had About All Of These Symptoms In My 96 Powerstroke,replaced Sensors,had Tranny Rebuilt,did Not Help,finnally Had Speedo Cluster Replaced,fixed It!!!!

 

I HAD the exact same symtoms as mentioned in the opening post the other day when the temperature outside went from well below freezing to 60 deg. in twelve hours. Lasted two days--same time length as the warm weather. also about three months ago, while towing around 4-5k pounds the tc was not locking up. No problem without the load. All this leads me to think about the post which mentioned the tc slips and creates heat. Is it the slipping that causes the code or the heat? i am not inclined to look at the VSS because i have problems with that in the past and it caused the speedo to do weird things, also the symptoms for that were similar to this but not exactly the same.

 

my buddies truck that im getting ready to buy (laid off, just have to get a new job first) has the overdrive light flashing too... his tranny shifts a little slow though, slipps between gears, i dont know if it does it under all driving conditions or not, when we drove it, we had our feet barried in it, wide open throttle, and it would slip for about 2-3 seconds between gears, think its just the od light flashing or could the torque converter be going south? i thought about hooking up a tranny lock switch and seeing if that helped while going through the gears? just to trouble shoot the torque converter...

oh yea its a 97 cc 7.3, e4od 250K mi

 

if it slips BETWEEn gears its the tranny itself. The TC is a three stage lockup in percentage. If its failing alone, you will only really notice it in od when you give it enough to pass someone, youll notice the rps slide up without any speed increase. If its inbetween shifts 123, time for new tranny.

 

that's interesting, i am going to have to look for that on the way home tonight.

what part of ohio you from todd?

 

I am from marion, about 40 miles north of columbus. If you need help doing this, I can lend you a hand, as long as its in the morning and I had an excuse to get to the riverboats....LOL

 

How?
A 4R100 has PW lockup not the E4OD.

Bill

 

How what? They way that I have understood all tc is that is a percentage lockup due to fluid engine rpm to create disc friction. If it never locked, you would be building constant heat and destroy it in a 1000 miles or so. Further proof of this is located in the front of our trucks with that little tranny cooler. If it didnt cdo a complete lock, you think that little thing would cool it during a load of say 14k?

 

What?

Its either locked or unlocked.
Unlocked it uses the multiplication of the TC. (fluid coupled)
Locked its 1 to 1 (clutch coupled)

E4OD is locked or unlocked.
4R100 has a PW for a soft lock (% while locking)

Bill

 

oops totally forgot to check for "partial" lock up on the way home, but apparently i didn't need to check for that on my E4OD according to madvan. thanks, todd, i'm good right now, but i might want to do that oil pan gasket in a few months, yeah, right, just kidding.

 

only the codes will tell, the flashing od light means, transmission codes, converter codes, broken wiring and it can also be caused by a bad speedo head, a bad speed snesor and a bad fuel pressure regulator. All the more reason to pull the codes before you throw good money down the drain.
Larry
1996 F-350 dually 1,178,000 miles and still works everyday hauling freight.

 

Larry, if you really have powerstroke with over a million miles on it, WOW. I don't know about anyone else, but I would definatly like to see and hear more about this truck. I've never even heard of a truck with a million miles on it. What is you maintenance schedule, major failures, milestones etc. Sorry for the off topic guys, but I had to ask. Heck, you could even start a new thread about it. I guarentee there are people on here wanting to know how to get their truck that far. Sorry for the rambling.