Transmission compatibility
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4wd High
Joined: Feb 2023
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Transmission compatibility
I've done some digging but not countless hours of digging and trying to maybe sum up a list of all the transmissions compatible between motors.
From what I've read ford kept the same bellhousing bolt patterns across the modular platform from 4.6/5.0/5.4/6.2(i believe full under this)/6.8
So are the 4r75/4r100, 6r80/6r100/6r140, 5r100 all interchangeable with one another? Since they (to my knowledge) just bolt to the back of each block? And would adapter plates for one transmission work for others given the same bolt pattern.
hopefully we can create a transmission interchangeable thread for other members looking for a answer in one location.
From what I've read ford kept the same bellhousing bolt patterns across the modular platform from 4.6/5.0/5.4/6.2(i believe full under this)/6.8
So are the 4r75/4r100, 6r80/6r100/6r140, 5r100 all interchangeable with one another? Since they (to my knowledge) just bolt to the back of each block? And would adapter plates for one transmission work for others given the same bolt pattern.
hopefully we can create a transmission interchangeable thread for other members looking for a answer in one location.
Fleet Mechanic
Joined: Jul 2019
Posts: 1,304
Likes: 310
One problem you will definitely run into is that most of these transmissions are controlled differently.
Can’t just swap a 4R70 for a 4R100, for example, because the “100” uses a separate controller that the lighter duty sibling doesn’t.
The newer transmissions likely need to handshake with CANBUS, so they’ll likely need a stand alone controller of their own to make magic happen.
Can’t just swap a 4R70 for a 4R100, for example, because the “100” uses a separate controller that the lighter duty sibling doesn’t.
The newer transmissions likely need to handshake with CANBUS, so they’ll likely need a stand alone controller of their own to make magic happen.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
Having made that correction, it is true that you can't use the PCM from a 4R70W to make a 4R100 work. It won't control that transmission. In fact, no PCM can control a different transmission.
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4wd High
Joined: Feb 2023
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True. Not true. All 4R100s were controlled by the PCM (Powertrain Control Module) that controlled both he engine and the transmission. Having made that correction, it is true that you can't use the PCM from a 4R70W to make a 4R100 work. It won't control that transmission. In fact, no PCM can control a different transmission.
I'm trying to source an adapter plate for a 6r80 however that isn't an option but a 5.4/6.8 adapter plate is available.
Fleet Mechanic
Joined: Feb 2004
Posts: 1,816
Likes: 3
From: River Valley AR
The bolt pattern on the transmission is only one of many issues to contend with. I think your biggest obstacles are all going to be related to the control side, especially when going to a newer design.
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4wd High
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4wd Low
Joined: Oct 2012
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Aviator 4.6 swap
Is this true? The 5R55E is weak, and will never handle this vehicle. It has a rebuilt in it that it having issues at 40K of normal ( not abusive ) use. I love everything else about this vehicle, and it's perfect for me. It has plenty of power to tow a boat, but this trans will not hold up. Why have it rebuilt if it's only going to last 40K? The Navigators have the 4R100 and they do great. I hope this thread isn't too old for this question.
Thanks!
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1st Gear
Joined: Jul 2024
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Questions and answers
Reading the thread may have answered a few questions for me. Can I swap the auto trans from an 05 f250 into a 05 f150? Same bellowing and all so it bolts up. Would I need to use the transfer case from the 250 as well as get a stand alone controller for the trans or can I make them shake hands with stock 150 computer?
1st Gear
Joined: Dec 2024
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F150 to F250 swap?
I am new here. I was wondering if anyone could tell me if I can use a transmission from a 2002 F150 to replace my transmission in my 2003 F250. I found a really good deal on the transmission—I fear it’s not likely to work☹️
Thanks for any help you are able to provide!
Thanks for any help you are able to provide!
I've done some digging but not countless hours of digging and trying to maybe sum up a list of all the transmissions compatible between motors.
From what I've read ford kept the same bellhousing bolt patterns across the modular platform from 4.6/5.0/5.4/6.2(i believe full under this)/6.8
So are the 4r75/4r100, 6r80/6r100/6r140, 5r100 all interchangeable with one another? Since they (to my knowledge) just bolt to the back of each block? And would adapter plates for one transmission work for others given the same bolt pattern.
hopefully we can create a transmission interchangeable thread for other members looking for a answer in one location.
From what I've read ford kept the same bellhousing bolt patterns across the modular platform from 4.6/5.0/5.4/6.2(i believe full under this)/6.8
So are the 4r75/4r100, 6r80/6r100/6r140, 5r100 all interchangeable with one another? Since they (to my knowledge) just bolt to the back of each block? And would adapter plates for one transmission work for others given the same bolt pattern.
hopefully we can create a transmission interchangeable thread for other members looking for a answer in one location.
Fleet Mechanic
Joined: Jul 2019
Posts: 1,304
Likes: 310
If both trucks (moreso the F150) use the 4R100, then yes.
Most F150s don’t use that transmission, though. The 4R70 those usually make use of would be shredded pretty quickly and won’t be controlled by the F250 computer, anyway.
Most F150s don’t use that transmission, though. The 4R70 those usually make use of would be shredded pretty quickly and won’t be controlled by the F250 computer, anyway.
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