Im planning a c6 swap into my 94 F150 4x4 with e40d. Wonder what I can do about the computer If I find one for a 94 with a stick would that work or does anyone know where I could get It flashed or reprogramed. Also wondering if the tranny crossmemeber are interchangable for the c6 and transfer case. If I use a np205 can if be out of a 79 F250 with 400m c6. I dont know if the np205 will bolt up to a small c6. Thanks

 

You can NOT use a Manual transmission ECM for a C6 installation because you do not have a clutch pedal position circuit. Also, '93, '94, and '95 ECMs calibrated for C6 are hard to come by. I know, I own one. It took almost a month to find one from a dealer, because Ford central parts had NONE in stock. Plus the wiring harness for the Manual Lever Position sensor is different.

 

Just a tip - I've seen a decent number of 1992+ Econoline Vans with EFI & C6's in my local junkyard. I can't confirm the EEC compatibility between vans & trucks, but I figured the info would help someone out. Vans are much more common than Trucks in 'yards around here.

 

Yes, starting in the '92 model year, by demand from fleet operators, tow truck companies and informed consumers, Ford re introduced the C6 as a transmission option on all vehicles over 8400 GVW. The reason was that the E4OD was such a crummy transmission that could not stay together more than 50K miles in demanding use. I own a '94 F250 with a 5.8L. Last year, I had to replace the ECM, and my local Ford dealer had a hard time locating one. The reason being is that over all, there are not that many vehicles in that configuration nationwide compared to other more common configurations. In order to get a replacement, there needs to be a core available (some one else's ECM has to break) to remanufacture a new ECM. That coupled with Motorola selling off that division some years back did not help either. If you can find an ECM for the particular engine/transmission match at a junkyard, that is great. Double check that your wiring harness has the right wiring also. And don't forget the vacuum connection tubing and throttle Kickdown cable assembly.

 

just a question why do you wan't to switch out your E40D to a C6 an E40D is a good trans and tuff.

 

Cross members are different. There is on for E40D and one for C6/M5OD.

 

Properly built/rebuilt the E4OD is very strong, I do belive you can bolt a NP205 to one as well but there are some clearance issues. I have a C6 in my 89 and have always had E4OD's in my trucks belive me once it's gone you really miss that overdrive.

 

Well, back in '93 I would have strongly disagreed with you. E4OD transmissions were failing by 70,000 miles. If you did not have an extended warranty, you would be looking at between $3000 and $4000 for an overhaul. A C6 could be overhauled for $1000 or less. Abused, a C6 usually made it to 100,000 miles, properly cared for, you could get 250,000 miles out of one before needing an overhaul. Try doing that with todays transmissions! As for "missing" that overdrive, the fuel savings would be eclipsed by the cost of the overhaul, plus the premium optional cost. In '93, I think the C6 was a $500 option, and the E4OD was $1200. At the time, the cost analysis was overwhelming in favor of the C6. I figured it based on $1.50 gallon gas (at the time gas $1.18/gal), fixed costs and Gas versus Diesel. For the type of general use I needed the truck for I went with 5.8 liter gas, C6, and 3.55 final drive ratio. It was much cheaper over 30,000 mile and 100,000 mile calculations. I still own the truck today, and it runs great. The transmission still works the same as it did when I drove it off the dealer lot. I have 102,000 miles on it now. I know that is low miles, but for the past 2 years I have been putting 250 miles a week on it.

Even with gas prices what they are today, I think I am still money ahead keeping it, because of the prices for new trucks today, plus interest, higher registration and fees. I really don't want car payments. My monthly fuel costs are less than a monthly car payment alone.
If I was to buy a full size truck today though, I would not get one with an automatic transmission option. I would get a stick shift. I am not convinced that automatics these days are durable enough. To this day, nothing is tougher than a C6 or a GM TurboHydramatic 400.

 

I guess I've had a good run with the trucks I have/had equiped with E4ODs. One of which was a 90 F-250. That truck was under heavy load quite frequently and never had any problems out of the trans. My Lightning has an E4OD as well, and I abuse the crap out of that thing and no problems thus far. A few family members and some friends have that trans as well and I haven't heard them speak of any problems thus far.

I'll have to agree, the C6s can be built to be abused, and for alot less. But I have yet to encounter so many problems that would steer me into swaping to a C6...that, and I really like having OD. Just my .02

 

What would the clearance issues be.

 

there wont be any clearance issues. is your 94 mass air equiped? if so then you could run an A9L or A9P and do a little pin moving on the harness which isnt hard at all. if you have speed density you can find an ecu from 88+ running either a C6 or AOD from bronco/f150/f250 or vans. the AOD would mainly be in the bronco/f150 group.
check out www.fordfuelinjection.com for proper pin changes on the harness.

 

The cross member needs to be moved up (like 4" inches I think) and a longer driveshaft is needed.

 

well i got 138,000 miles on my E4OD and i do know is is pricey to rebuild but like my brother sed (blurry94) he pushing close to 410 hp and no problems so far. But that a good reason some people do have good luck and some do not on the E4OD trans well good luck it sounds like a good project.