EEC-IV or OBD-II?
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Senior User
Joined: Jun 1999
Posts: 121
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From: 3 mi N of Crookston, NE
EEC-IV or OBD-II?
Is my 1995 F-150 4x4 5.0L with 4R70W transmission EEC-IV or OBD-II? What can I look at to tell for certain? I read one comment that said Ford started phasing in OBD-II in some 1995s. The manufacture date is 5-95. I bought the pickup used and I think it has a replacement engine in it, there could be other changes as well.
There is a small grey open connector under the dash just above the transmission tunnel. Would that be the connection point for a scanner?
My transmission is giving me troubles. Is it controlled by the same module that controls the engine? Could it be upgraded to a newer year?
There is a small grey open connector under the dash just above the transmission tunnel. Would that be the connection point for a scanner?
My transmission is giving me troubles. Is it controlled by the same module that controls the engine? Could it be upgraded to a newer year?
Senior User
Joined: Oct 2006
Posts: 168
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From: Kingwood, Texas
My '96 was built in Oct. of '95. It's OBD II and the plug is in the same place as yours. It's my understanding that the OBD II's are mounted here and anything prior, was in the engine compartment. I could be wrong though.
Silly question, but can't you just plug the scanner into the port and see what it says?
Silly question, but can't you just plug the scanner into the port and see what it says?
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
That is where the OBD-II connector is located. Yours could be OBD-II even though it's not "supposed" to be. What does the connector look like? Can you give dimensions? A clear pic would be conclusive.
Yes the same computer controls both the engine and transmission.
Pretty silly because if he already had an OBD-II scanner he likely wouldn't be asking where the plug is and what it looks like.
Yes the same computer controls both the engine and transmission.
Pretty silly because if he already had an OBD-II scanner he likely wouldn't be asking where the plug is and what it looks like.
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Senior User
Joined: Jun 1999
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From: 3 mi N of Crookston, NE
Thanks
Thanks everyone for the great information and pictures. I didn't even know I had a brake controller plug. Looks like I'll have to stick with rebuilding the transmission. I was hoping I could just drop in a newer year used one from a salvage yard. I had one located that was out of a low-miles wrecked 97 explorer.
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Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
I don't understand why you wouldn't have just asked if you could use a transmission out of a 97 Explorer then. The engine control system that your truck uses has absolutely nothing to do with whether the transmission will work or not.
What motor is in the Explorer? Is it 4x4?
What motor is in the Explorer? Is it 4x4?
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Thread Starter
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Senior User
Joined: Jun 1999
Posts: 121
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From: 3 mi N of Crookston, NE
EEC-IV or OBD-II?
The transmission I had spotted was from a wrecked 1997 Explorer 4x4 with a 5.0L. I know they are the same motor and both 4x4s, and the transmission has the same physical dimensions as far as I know, but my local Ford parts man told me the 97 transmission would be looking for electronic shifting instructions from OBD-II, and wouldn't work right hooked up to my 95's EEC-IV computer. I don't understand it, as I would think either ECU would send the same signals to the transmission. Just using caution and hearing all opinions, as the swap is a lot of work to get one in there and then not have it work right.
Fleet Owner
Joined: Aug 2005
Posts: 23,668
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From: Easton,Ks
What the parts guy may be talking about is the clutches in the two years. The signal from the 95 are not the same as the 97 because of the type of clutches used.
It has nothing to do with OBD-I or II.
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It has nothing to do with OBD-I or II.
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
He made that up. He has no idea of what he is talking about. OBD-II doesn't shift the transmission, the PCM does that. OBD-II is the diagnostics that runs in the PCM. You managed to find a parts guy that doesn't know anything about what he's selling.
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Senior User
Joined: Jun 1999
Posts: 121
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From: 3 mi N of Crookston, NE
EEC-IV or OBD-II?
I know parts guys are always slanted more towards selling new parts.
So if the electrical connectors are the same it should be a switch-n-go project? I haven't been able to look at the transmission since it is an out-of-state salvage yard. Any small upgrade or maintenance things you would do to a used transmission before installing it?
So if the electrical connectors are the same it should be a switch-n-go project? I haven't been able to look at the transmission since it is an out-of-state salvage yard. Any small upgrade or maintenance things you would do to a used transmission before installing it?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
There could be some pin location changes. It's been way too long ago for me to remember. If the electrical is the same and the trans came from a 4x4 5.0L Explorer it will bolt right in.
