4.0l swap
Elder User
Joined: Jul 2003
Posts: 649
Likes: 1
From: north carolina
also make sure you get the eec and all appropriate wiring for the 4.0L you will need it for the swap as well as the engine itself. also i would try to get an eec that corresponds with what you have. what i mean is if you have an automatic tranny get an eec for and auto. and visa versa for the manuel.
Post Fiend
Joined: Jul 2005
Posts: 8,462
Likes: 4
From: Durant, OK (SOSU)
Make sure you get the right one for the tranny though. We've had several auto trannies, some four some five speed. You're gonna have to find a 4.0L with your engine and tranny to get the comp from. Sounds like you have some fun ahead of you!
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New User
Joined: Nov 2005
Posts: 14
Likes: 0
i have a 5-speed, but should the 40.l's tranny really matter because my doesn't have any electronics on it. i thought all that mattered was the engine comp was the right one. What years are the easiest for the swap, what do you think i'll get for gas mileage after the swap?
Posting Guru
Joined: Jul 2003
Posts: 1,978
Likes: 1
From: Alvin, Texas.
The 4.0L will hook up to a 2.9L or even a 2.6 or 2.8L v6 tranny, but they are really too soft for a 4.0L engien.
You do NOT need a slushbox computer for a non-electronic auto tranny. You can use a similar year manual tranny computer for all the engine or tranny cares.
For example, my friend got a manual tranny computer for his 4.9L F350 wrecker truck, which has a C6 tranny. Works fine.
The easiest 4.0L donor would be the earliest model you can get. As in...don't get a 99 model drivetrain where you DO need the tranny computer for that instance! Try around 91 or earlier, if possible.
You do NOT need a slushbox computer for a non-electronic auto tranny. You can use a similar year manual tranny computer for all the engine or tranny cares.
For example, my friend got a manual tranny computer for his 4.9L F350 wrecker truck, which has a C6 tranny. Works fine.
The easiest 4.0L donor would be the earliest model you can get. As in...don't get a 99 model drivetrain where you DO need the tranny computer for that instance! Try around 91 or earlier, if possible.
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New User
Joined: Sep 2003
Posts: 9
Likes: 0
From: Hopkins, MN
Best thing I have read is a 90 or 91 ranger/explorer. Try to get the engine and tranny together. The 4.0 has way to much torque for the old tranny's.
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Post Fiend
Joined: Jul 2005
Posts: 8,462
Likes: 4
From: Durant, OK (SOSU)
I'd like to see how a manual tranny comp is running an auto.
If you have a stick, it doesn't matter either way. I agree you don't want a tranny from a 2.8/2.9L for the 4.0L, the torque can rip it to shreds. I would say get the 4.0L engine, but get the tranny with it.
If you have a stick, it doesn't matter either way. I agree you don't want a tranny from a 2.8/2.9L for the 4.0L, the torque can rip it to shreds. I would say get the 4.0L engine, but get the tranny with it.
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New User
Joined: Nov 2005
Posts: 14
Likes: 0
will the newer sohc 4.0L's bolt up to the older v-6 trannies. i was also wondering what kind of t-cases were on the newer 5-speed trannies that bolt up to the newer 4.0L's. will the one on my ranger now bolt up to a newer one?
Senior User
Joined: Feb 2005
Posts: 146
Likes: 0
From: Lewiston
I need some help
I have a 90 4x4 ranger with a 5 speed tranny. I would like to swap the 2.0 for a 4.0. I have read that you should get 4.0 tranny also when you get the engine. What else do I need to get. Does all the wiring of the 2.9 interchange with the 4.0
Also, I would some help on how to post a new question on this.
Thanks for the help anybody
Seafire
Also, I would some help on how to post a new question on this.
Thanks for the help anybody
Seafire
Post Fiend
Joined: Jul 2005
Posts: 8,462
Likes: 4
From: Durant, OK (SOSU)
Sorry. I was kinda short in my response. What I meant by probably not was that the wiring stuff wouldn't interchange. You'd need all of it from the 4.0L since it's EFI.
Good little performance jump. If you're going to go through it why not just drop in a 302/5.0L?
Good little performance jump. If you're going to go through it why not just drop in a 302/5.0L?