Any one know where to get new or rebuilt Transmission controllers (with all the factory upgrades) for a 93 f250 7.3 turbo diesel with an e40d. I am told ford no longer makes them and finding the upgraded ones is very difficult.

 

I've seen this one discussed on the forums before:

http://www.becontrols.com/products/electronicscat.htm

 

Here's another that came up with a quick google search:

http://www.compushift.com/products/compushift

Says its compatible with the e4od.

 

Your factory PCM controls the transmission. Why do you need one?

 

Thanks for the replys. I have been looking at those mentioned but think I would like to go with OEM and get that working good before I try aftermarket. I am told that Ford made lots of updates to these before they quit making them. The trans shop says that my controller now is questionable and most likely needs replaced. My truck is one of the rare ones 242,000 miles on the original trans all of it towing heavy loads.

 

PCM's *very* rarely go bad. Sounds to me like they are padding their bottom line with your money.

 

From what I read in the links posted by Chris it that all you really need is a PCM from a 94 or newer truck to get what you're are looking for.

Not user adjustable as the after market one you can buy for what 1200 odd bucks but a used PCM from a 94-95 model truck with a E4OD out of the bone yard would surely be cheaper.

 

Once you have determined definitively that the PCM is actually bad, a junkyard is the way to go.

 

I think NWfish is looking for the PCM that has the factory upgrades? That would be the 94 and up models that included them.

His truck being a 93 would benefit from a 94 PCM from what I just read and should be all he really needs.

 

All the upgrades that were ever made to the E4OD tranny were inside the tranny and had nothing to do with the computer. It could be that there actually were firmware upgrades that fixed bugs, but I haven't heard any mention of these.

I still think the tranny shop is taking him for a ride. I bet they were the ones who steered him towards an aftermarket controller (which they probably sell) and told him that factory PCMs were hard to find - they're not. The junkyards are full of them.

 

Now I am confused. I called the wrecking yard looking for a TCM they said there are 8 models for that truck alone and that most are not interchangeable. If it is the PCM - my truck is not a powerstroke and 94 and up were. Are you saying they are interchangeable?

 

No, they're not. The powerstroke is a computer controlled engine, the pre-powerstrokes were not, although they still need a PCM to do various things for them, not limited to shifting the tranny.

There are many different models of PCM available for even a specific engine/tranny combination. It will be problematic to find the correct one. It may require several tries, but I still don't see what you will gain by using a different one.

 

Just relaying what I just read, on one of the links posted by Chris it said the 94 PCM had some updates for the E40D starting that model year. It didn't say exactly what the changes where but the author recommended using a 94 or newer PCM to get em.

Unfortunately it didn't say anything more, I took it to mean getting one from the exact same model truck, same trans, same motor and what have ya but 94 or newer.

First I heard/read anything like it myself.

 

Ok took me forever to find it again as I was just skipping around and skim reading over some of it when I came across it, there was more about it in another section but I can't find it again.

This is a copy and paste of the one I could find again,

<i>I have a 91' F-150 with a straight 6, E4OD trany. Is it possible to put an AOD trany in it. Mine is a push button O.D.The truck runs great and ive had this trany rebuilt twice and it seems to mess up right after the warranty goes out. I love my truck but thats 4000 dollars in trany work in this truck. I dont know why its giving me so much trouble. It doesnt stay in 4th gear and downshifts on its own but if i take it out of overdrive by the O D button it drives fine. But now it shifts funny and when i take off about 10 ft it makes a hitting sound our clunk sound as if the tourque converter is going out.I know how to do just about everything else on a car or truck but i cant fix a trany problem. I dont know were to start and i keep getting screwed buy having it rebuilt. What should i do.

You could put the AOD in your truck, but it would be a fairly involved process. Your engine may not continue to run properly without the transmission connected to the Powertrain control module (PCM). You would also need to adapt shifter linkage and TV linkage to the AOD transmission. For the shifter linkage you could use parts from the AOD equipped 302 engined truck, but for the TV cable this would not be a suitable donor vehicle because the TV cable has to go to the throttle body which is much different on the 6 cylinder pickup than on the 302 pickup.

If you want to go with the AOD you could possibly change your trucks PCM to one from a 6 cylinder manual transmission equipped truck. This would keep the engine from having problems due to the electronic transmission being disconnected.

The reason for your repeat problems could be due to the factory control strategy for this transmission. Most references recommend updating to a 1994 level PCM after completing a rebuild on an early E4OD. You could also change over to our Baumannator TCS to run your E4OD to eliminate the problems in the factory controller. Just like with the AOD swap, this may cause some problems for your engine that could be addressed with a swap to a manual trans PCM. We have a detailed FAQ on using the TCS in a Vehicle Factory Equipped with an electronic transmission.</i>

Note the part where it is suggested he change to "a 1994 level PCM after completing a rebuild on an early E4OD." to cure the continued problems with a E40D.

 

Could be... I've been wrong enough times before. I would really like more information on it though. I know it was updated internally in 1994.