E4od to c6 conversion
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Trailering
Joined: Oct 2025
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E4od to c6 conversion
Hi all new to ford trucks and needing help. i bought a 91 f250 custom with a 351w and and blown e4od trans. I read that a c6 conversion is the easiest way to get this truck driving again. I fear I made a mistake and need help fixing or telling me if I'm wasting my time. the C6 i bought supposably came from an 87 mustang floor shift. I thought this would be a simple swap and the more I dig into this the more I seam to be falling down the rabbit whole. the goal is to get the truck to move on its own power right now. so what all do i need to do to get this truck to move with what i have I'm not worried about the kick down right now but I do know I will need to address it. please help I have no idea where to start and fear I have wasted money.
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Your '91 is going to want a signal to and from that E4OD, so you have a can of worms opening here anyway.
To ID the transmission and what it will fit, look at the transmission pan and count the bolts and note the shape. Also look at the bell housing and check the measurements. Compare to the info given here:
https://www.fordification.com/tech/transID-auto.htm
To ID the transmission and what it will fit, look at the transmission pan and count the bolts and note the shape. Also look at the bell housing and check the measurements. Compare to the info given here:
https://www.fordification.com/tech/transID-auto.htm
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Trailering
Joined: Oct 2025
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I believe I read on a post that you can trick the computer without replacing the ecm. am i incorrect? other wise i would have to get a computer for a manual or a truck with a c6?
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As already mentioned there were no C6 transmissions in fox body Mustangs.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
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Trailering
Joined: Oct 2025
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its just and old farm truck i just want to use it around my property to move stuff. its nothing I plan to make a show truck or even register. i just want it to move under its own power otherwise I'm taking it to the scrap yard. i don't care about codes. it just need to move on its own.
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Trailering
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[QUOTE=My4Fordtrucks;21681962]As already mentioned there were no C6 transmissions in fox body Mustangs.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
I will post a photo in the moments tonight when I get home of what i bought I and hoping the gentleman bought it from was wrong in telling when what i came out of what i know for certain is its a floor shift.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
I will post a photo in the moments tonight when I get home of what i bought I and hoping the gentleman bought it from was wrong in telling when what i came out of what i know for certain is its a floor shift.
Logistics Pro
Joined: Aug 2014
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[QUOTE=Jdrain;21681981]
Floor shift vs column shift has nothing to do with the transmission.
That's just linkage, rods & cables.
As already mentioned there were no C6 transmissions in fox body Mustangs.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
I will post a photo in the moments tonight when I get home of what i bought I and hoping the gentleman bought it from was wrong in telling when what i came out of what i know for certain is its a floor shift.
Yes, some people have had success by placing the MLPS in park or neutral and using the auto trans computer. You will get fault codes since there won’t be input from the trans.
I will post a photo in the moments tonight when I get home of what i bought I and hoping the gentleman bought it from was wrong in telling when what i came out of what i know for certain is its a floor shift.
That's just linkage, rods & cables.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,705
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From: SE Florida
The E4OD is longer than a C6, so you'll need to lengthen the driveshaft and modify or move the transmission crossmember to make this fit.
That does look like a C6, but the C6 wasn't available in an '87 Mustang.
That does look like a C6, but the C6 wasn't available in an '87 Mustang.
Last edited by Mark Kovalsky; Oct 20, 2025 at 09:19 PM.