4R70W to E4OD
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4R70W to E4OD
I'm converting my 1996 F150 to 4X4. I have a 1994 F150 as a donor truck, it got recked. My 96 has a 4R70W, but its a 2X4 and the donkr has a 4X4 E4OD. What would i need to make it work in my 96? Obviously I hav ethe wiring harness/computer, but where in the truck is the computer and do I need the wiring harness also? Anything else I need to know/any problems i would have?
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
You will need a wiring harness because they are different. You'll also need the trans mount and either a new driveshaft or modify the one you have. I think the E4OD is longer, I'm not certain about that.
Lead Driver
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You will need the ECU as well, it is in the driver's side footwell behind the kick panel. It will plug into your existing harness there. You will need the harness from the donor truck that plugs in under the hood and runs to the trans.
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I have the driveshafts, so that won't be a problem. Why would I have to swap the ECU? Doesn't the transmission have its own computer? I'm seeing this MAF thrown around alot, and the donor has the same Mass Air Flow sensor and intake asmine if that helps. The only difference I see is the lack of an odbii port.
Lead Driver
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From: Greater Austin, Texas
The 1996 F150 is OBD-II. The donor 1994 is OBD-I.The 1994 may or not be MAF as well. The swap becomes much move involved. Nothing will be plug-n-play.
Why would I have to swap the ECU? Doesn't the transmission have its own computer?
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Couldn't make it easy. I would have preferred to just put a transfer case on the 4R70W, but of course thay would have been to easy. So will I need the whole engine harness, or just trace the trans harness back to wherever it plugs in at? And when I change ECU, is there any potential problems I should be aware of? Iluse the flex plate, converter, and backing plate from the E4OD, just to make sure I don't have any issues there.
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Fleet Owner
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No, 1994/95 F150/Bronco MAF trucks were OBD-I. They use the same 60 pin PCM as the Speed Density vehicles.. 1996 was the official start for OBD-II on these lighter trucks and some heavier trucks with Cali. emissions. These use the 103 pin OBD-II based PCM (computer). Some have stated there were some California emission trucks starting in 1995. I have never seen one or mention in any Ford service manual that I own.
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Fleet Owner
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From: Easton,Ks
You need both the engine harness, under hood harness and the transmission harness.
Not sure on the cab harness.
Pulse engine parts and sensors like the EGR valve and sensor.
Yes the 1994 was OBD1 and the 1996 was OBD2 for the F150.
Here is a diagram showing the differences between the E4OD and the 4R70W transmission harness.
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Not sure on the cab harness.
Pulse engine parts and sensors like the EGR valve and sensor.
Yes the 1994 was OBD1 and the 1996 was OBD2 for the F150.
Here is a diagram showing the differences between the E4OD and the 4R70W transmission harness.
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Fleet Owner
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From: Kentucky
You have a complete donor, but I highly recommend wiring diagrams for each truck.
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Well the original harness didnt go unscathed. The previous owner has hacked into it for who knows what reason, so lots of solder and heat shrinking to do. Almost easier to srick a carb on it at this point.
Frmr Ford Trans Engr
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From: SE Florida
OBD-II started in 1996 in the F-Series. It was not in ANY F-Series in 1994.
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Thats what I've been told. So it sounds like my o ly option is to swith the whole wiring harness out. I was trying to avoid that, being that it's a lot of work. I would like to convert my 4R70W to 4x4 being that its only got 5,000 miles on it. The E4OD is newly rebuilt also, but it's a huge amount of work. Almost easier to carb it seems
FTE Legend
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From: Ottawa, Ontario
No. These transmissions are 100% computer controlled so you have to retain it's control system, so going carb doesn't make this easier it actually makes it more complicated.