Replacement for E4OD possibly Allison 1000
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Senior User
Joined: Aug 2006
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From: Saint Louis,Mo.
Replacement for E4OD possibly Allison 1000
Anyone every replace their E4OD with an Allison 1000 series transmission? I realize there is a matter of the allison being controlled by a computer but is that seperate from the rest of the GM truck it comes in? I'm sure an adapter plate can be made to mate it to our IDI blocks and new bungs welded onto the Allisons torque converter to bolt it to our flywheel right? What are your thoughts on this guys?
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Joined: Mar 2008
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From: Sweet Home, OR
I don't know for sure but I have talked to a few trans. experts that say the Allison 1000 is the best of the "pick-up" trannys but they are far from a "real" Allison. They have all said they are overated.
I have two Allison 545 trans. they are not O.D. equiped but I bought one for $300 and the other for $350. I am going to combine the two (one had all of the Cummins equipment and the other had the "parking" brake and shifter assembly) and put them in my Dodge CrewCab project. I don't need overdrive as I am going to have 36" tires and 3:54 gears. I'm going to run an older Ford divorced NP-205 and '90 Ford Dana 60 frontend.
I'm sure they put these trannys behind IH/Navistar motors too. They all seem to be "universal" with adapters/torque converters to match specific motors. One of mine came out of a Volvo truck. The two I have are in good working order and are completely mechanical. You might look into these trans. if they fit your needs.
I'm sure someone more knowledgeable on auto trannys will chime in on this.
I have two Allison 545 trans. they are not O.D. equiped but I bought one for $300 and the other for $350. I am going to combine the two (one had all of the Cummins equipment and the other had the "parking" brake and shifter assembly) and put them in my Dodge CrewCab project. I don't need overdrive as I am going to have 36" tires and 3:54 gears. I'm going to run an older Ford divorced NP-205 and '90 Ford Dana 60 frontend.
I'm sure they put these trannys behind IH/Navistar motors too. They all seem to be "universal" with adapters/torque converters to match specific motors. One of mine came out of a Volvo truck. The two I have are in good working order and are completely mechanical. You might look into these trans. if they fit your needs.
I'm sure someone more knowledgeable on auto trannys will chime in on this.
Posting Guru
Joined: Mar 2005
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From: KY
The Allison trans have an there own ECM and you probably could make it work. I drive a Chevy at work that has a newer version of it then the first ones. It had a mode function that let the drive change the gears himself. It will let you red line it if you want.
It is a good trans. They can have problems, like anything else, but they are the most complicated trans Allison ever built as far as electronics is concerned. That means there is more room for error. I was one of the first people in my area to be certified on one at the dealer level in my area. It has been awhile so I can't get very technical about them anymore. I know people that know them very well.
It is a good trans. They can have problems, like anything else, but they are the most complicated trans Allison ever built as far as electronics is concerned. That means there is more room for error. I was one of the first people in my area to be certified on one at the dealer level in my area. It has been awhile so I can't get very technical about them anymore. I know people that know them very well.
Tuned
Joined: Jan 2008
Posts: 295
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From: Ohio
obviously the allison is a unviversal trans , you can buy a flywheel and torque convertor that will bolt up, they did have allisons bolt up to 7.3l engines. and the tcm is way better then the ridiculous pcm's that are in cars, i work at w.w.williams, and i know first hand how much easier they are to work on because the trans practically talks to you, unlike the older AT'S. technology can be great....
Posting Guru
Joined: Jul 2004
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From: West Valley Utah
I've thought about an allison swap before. I know there are adapters for the engine side. I don't know if one can be converted on the backside to adapt to a Ford transfer case. Might have to go with a divorced unit to make it possible. I have not gotten that deep into the research.
Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
i don't know of any way without a divorced x-case, that's my plan anyway. And I'll have to have a custom short driveline to mate the two.
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Senior User
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From: Saint Louis,Mo.
So there are kits out there that will allow me to install the allison onto my IDI? Any websites?
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Thread Starter
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Senior User
Joined: Aug 2006
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From: Saint Louis,Mo.
What models and years for these international trucks? I've got a friend that works for a junkyard maybe he get get me one if i knew what they came in. If I got one out of these trucks then all I would need is the flywheel and tranny? What about the crossmember and mount? This is a for a '94 CC Dually 2X4.
Lead Driver
Joined: Nov 2003
Posts: 6,900
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From: Campbell River, B.C.
I did an E4OD swap, and fitting the new crossmember was easy, just mark the location of the new holes and drill them out (pilot drilling helps). I have no doubt that you can reuse the original crossmember with some minor modding.
Posting Guru
Joined: May 2003
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From: Joliet, Illinois
I do remember he IDI 7.3 Diesel had a plate on the back of the engine that the trans mounted to, so I would assume it can either be replaced with one that is made for that trans engine combo (assuming there was one ever made), or modified to fit it.