Hello...Haven't been here since I lost my 90 Big Bronco in the wild fires that burnt half of CA But I've rebounded and bought another...but an 89'
Here's my problem...Everything going great engine wise. But lost all gerars I EAOD tranny. So after months of sitting I pulled tranny out and It looks like someone's been in it already. (Still fresh silicon on threads) Behind torqe converter is all very clean...If this matters...
Here it is in a nut shell...Is there an easy fix? Could it be a bad torqe converter for me losing all gears? Please say Yes...But I know it won't be this easy...Any suggestions or wonder fixes(with a sugar coat please) will be apreciated...Thanks guys Scotty

 

Um, well the second digit is probably a 4 as in E4OD. What exactly do you mean by "lost all gears"? If the pump failed during operation, you are probably looking at a complete rebuild no matter how pretty it may look inside. Once the converter loses fluid pressure during operation, it is usually a matter of minutes before it overheats and the internal (not visible) guts disintegrate. The concern then becomes whether or not the tiny little shards of metal that used to be the cooling fins in the converter got carried back into to rest of the tranny by the fluid. Try dropping the pan and inspecting the filter and the bottom of the pan. If the guts of the converter carried through the fluid into the tranny, it should be obvious here.

 

I am not sure exactly what the problem that you are describing is. But if the transmission is not working, and it looks like someone has been in it lately, it leads me to think that someone who did not know what they were doing tried to fix the transmission enough to get rid of it, and unloaded it on you. That's just a wild guess, of course; we really need more information.

Of course it could just be the torque converter. If you feel lucky, you could just put a new torque converter in and hope that it works.

 

Your right...it is a E4OD. Here's what happened. I was driving normal slowing down to make a left and heard a "clunk" and the whine of the engine. So I shifted down a gear and it ran for about 1/2 mile then lost that gear and all the rest.

The transmission fluid was still nice and red and didn't smell or look burnt. I did have a little bit of medal shaving but not a whole lot. JBronco probably right when he said that it was fixed just enough to sell. I just didn't want to say this, Bummer...looks like I need a rebuild.... It's just my money tree is out of fruit. Hopefully I could get an easy fix, guess not. Thanks guys....

 

Sounds like primary clutch drive gears. Does it still go in reverse?

 

It doesn't go into any gear... Could the pump go out and/or have any thing to do with it not going into gear? It's like there's no feeling of anything when you shiftdown into the the gears but nothings broken (at least on the outside)hmmm...

 

Yep, sounds like the pump let go. I had this happen in the middle of the interstate at about 65-70 mph. Fortunately I had the presence of mind to keep the hammer down and just keep going until I could pull off the highway to a service station. Torque converter was in full lock-up so it kept me going until I stopped. Once I had stopped I had NOTHING. No movement in ANY gear as you described. Dead pump = zero hydraulic pressure = no go. There is a very slim chance that the pump was the only thing to fail. However, with no fluid movement, the TC overheats quickly and they tend to self-destruct internally. Wish it could be better news but what you describe is painfully familiar.

 

first off, it should be an AOD, not E4OD, not EAOD. the E4OD was not introduced in ford trucks/broncos until 1992. an easy way to tell if a later model E4OD was swapped in is to look at how you get to OD, if there is a button on the end of the shifter to turn the OD on/off, it is E4OD, if you have a gear selection for O/D, it is AOD. it should be AOD, since that was the only tranny installed in 87-91 broncos/f-series trucks.

 

I with Dirt on the AOD issue. My 87/88/89 all had the AOD's in them. But as for why you have no gears...not my area of expertise or experience. The only thing I could think of is that you might be short on fluid. My 88 lost a coupla seals and would pump the fluid out. Once it was down more than 2 litres it would slid and skip gears.

Don

 

l picked up a 91 f-250 in july 04. has a great runing 351 in and a E40D trany . After runing about 500 miles the front seal overheated and droped out 2 quarts of fluid in a couple of minutes right in my son,s driveway. l got the truck home and pulled it out and opened it up . l couldn,t find the right book on it at the time so it,s like working in the dark. After opening it up l find out it is a rebuilt unit. l could see all the numbers on the faces of the clutch plates. That made me feel pretty good about the deal l got on the truck. Well without the book to show all the parts l put it back in with two new seals. At this time little did l know that
ford had alot of trouble with this tranny. l found this out after talking to a ford mechanic. The slightest bit of overheating and the front seal will colapse and dump the fluid . Shut it down and let it cool and it will seal up again. The tranny had very rough up shifting since l bought it. l finely found the book that covered it and l pulled it out again. l found that 2 ball check valves were missing and 1 spring on the shift control valve. The book doesn,t show the actual size of that spring so l found a fairly lite one and put it back in . lt,s alot better now then it was. On your tranny , did you put a pressure gauge on it before you pulled it out? lf you don,t get any pressure readings it probly is pump trouble or like some of the other guys said the converter is gone . good luck. PS, lf you can get the book that covers that tranny. l,ts money well spent .

 

How do you explain the number of E4OD equipped trucks from that time frame then? The E4OD was an optional transmission prior to 92. 92 was the first year the AOD was no longer offered. Obviously, he LOOKED at his truck to find out the tranny type.

Yes, the E4OD had more than its fair share of problems especially longevity issues and the inability to handle greater torque output from the Ford diesels. In 93, Ford reworked the innards of the E4OD to address these issues. While the reworking did help with the longevity issues in the half-ton trucks, the fully electronic 4 speed still doesn't last long behind the diesels.

 

Greystreak,

He did offer up his tranny as an EAOD to start with....

 

exactly why i also asked the other questions to determine which tranny he actually does have. no need to be an **** about it.