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Unread 07-29-2010, 11:24 PM   #1
Crashwhitehouse
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Dead 4 banger. Time for a motor swap

Okay so i have decided that the 4banger did in fact die. And honestly I have been waiting for this to happen so I can put in a engine that im happy with. But here is the thing. In my area, might as well say Louisville Ky. Im not finding any tranys. The 4.0s are a dime a dozen but they are all attached to the automatic trany. I cannot find my 5speed trans i want. Im almost to the point of saying heck with it and looking at my other options. I dont want a 350 because I know what I will be doing with it. it will turn into a toy only. I was kinda thinkin along the lines of a 4.3? Im a big fan of the 4.3 but im not sure if I want to fight with it all. as far as cost goes, is it even close to just sticking with the 4.0? Also i did find a 1985 Cj trans for 250$. Im not sure what model it is. but i doubt it is a ax-5. Any suggestions would be awesome. I just have to get this thing up and running on a budget. ive got classes to pay for soon lol.

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Unread 07-30-2010, 07:56 AM   #2
97GC817
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Won't the 4.0 mount right up to your tranny? If not, check advanced adapters....they make bell housings to marry any motor with any tranny...Also, check out the other stuff you are going to have to do if you change motor size...pcm, engine management, exhaust...etc.
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Unread 07-30-2010, 08:06 AM   #3
Wheelin98TJ
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Do a V8 and don't look back.

I would not bother with a 4.3. If you're going to do a 6 cylinder, then I would definitely go with the 4.0 I6.

The AX-5 does not bolt up to the 4.0.
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Unread 07-30-2010, 08:22 AM   #4
97GC817
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That's a bummer they don't mesh up, I was thinking it would...what happens with the engine management when going from 2.5 to 4.0? Why do you say V8, I think a 4 banger with 4.11's is excellent for the trail...4.0 make it better for the highway acceleration and stuff...but isn't a V8 overkill with a Jeep and cause you to spin the tires more on the trail?
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Unread 07-30-2010, 08:37 AM   #5
emev0l
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Either replace it with a cheap used 4 banger or go for a V8 swap.

It's going to be just as much work to put a 4.0 in as it would to put a V8.

The Hemi 5.7 is a good call, you can splice the harness and computer together and use all the stock gauges.
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Unread 07-30-2010, 08:39 AM   #6
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I am in the process of a 2.4 to 4.0 swap. I got super lucky and got the 4.0 tranny, transfercase(JB SYE and wide chain) driveshafts, wiring, ecm, and even things like, gauge cluster, gas pedal, all lines and hoses and mounts.
Keep yours eyes open and use crazedlist to broaden your search. I would have loved to have gone V8, but the price was right on the 4.0 and I was not going to wait forever to find a suitable 8.

Good luck!
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Unread 07-30-2010, 09:14 AM   #7
Crashwhitehouse
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Quote:
Originally Posted by emev0l View Post
...The Hemi 5.7 is a good call, you can splice the harness and computer together and use all the stock gauges.
but for the Hemi what is a good tranny to run. I dont do serious trails, I do snow, water, and mud. got to love the Ohio Valley. Im not yet got into the trails hardcore. I want to but thats another day.
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Unread 07-30-2010, 09:25 AM   #8
Crashwhitehouse
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I just found a 5.7 Hemi off a 2005 Magnum for 300 bucks with a blown head gasket. But to be honest, I have no issues with doing the swap other than the wiring. Wiring scares me. So much to go wrong lol.
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Unread 07-30-2010, 10:11 AM   #9
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Quote:
Originally Posted by Crashwhitehouse View Post
but for the Hemi what is a good tranny to run. I dont do serious trails, I do snow, water, and mud. got to love the Ohio Valley. Im not yet got into the trails hardcore. I want to but thats another day.
Quote:
Originally Posted by Crashwhitehouse View Post
I just found a 5.7 Hemi off a 2005 Magnum for 300 bucks with a blown head gasket. But to be honest, I have no issues with doing the swap other than the wiring. Wiring scares me. So much to go wrong lol.

The 545rfe five speed auto is a great tranny to use behind the 5.7 Hemi.

I wuold not touch a Hemi with a blown head gasket. They have aluminum heads, so overheating this engine can do some serious damage.
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Unread 07-30-2010, 10:20 AM   #10
Crashwhitehouse
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This is such a headache. Everytime I figure something up I end up with 100 more questions.
lets say I went with the 350 SBC. Do i have to do a ton of splicing to get all my knobs and buttons in the cab to work. I know the gauges wont. But what about the stuff like raido,lights, A/C, all those goodies. Im just trying to learn all I can before I get into this and get stuck. Also how hard is it to run fuel injection?
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Unread 07-30-2010, 10:25 AM   #11
Toms87
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Whatever engine swap you choose, since you said you are scared of wiring, buy a complete harness from Painless or Howell. After 3 ECMs literally smoked, I gave in and bought from Howell. Should have done that in the first place. Everything is labeled.

Quote:
Originally Posted by Crashwhitehouse View Post
This is such a headache. Everytime I figure something up I end up with 100 more questions.
lets say I went with the 350 SBC. Do i have to do a ton of splicing to get all my knobs and buttons in the cab to work. I know the gauges wont. But what about the stuff like raido,lights, A/C, all those goodies. Im just trying to learn all I can before I get into this and get stuck. Also how hard is it to run fuel injection?
That is the 2nd biggest pain behind getting engine wiring. In my YJ, probably half my gauges don't work.
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Unread 07-30-2010, 10:39 AM   #12
Crashwhitehouse
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Originally Posted by Toms87 View Post
That is the 2nd biggest pain behind getting engine wiring. In my YJ, probably half my gauges don't work.
Well I was reading something about a new gauge cluster that will fit the dash made for GM engines? i might be thinking wrong on this but im not sure.
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Unread 07-30-2010, 11:51 AM   #13
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Quote:
Originally Posted by Wheelin98TJ View Post
The 545rfe five speed auto is a great tranny to use behind the 5.7 Hemi.

I wuold not touch a Hemi with a blown head gasket. They have aluminum heads, so overheating this engine can do some serious damage.
Agreed, your best bet is to get that trans out of a RAM so it's easier to bolt up to your transfer case.

That motors only going to be good for someone who wants all the little parts off of it or someone who is going to build a stroker motor and is going to buy an aftermarket head. That's why it's dirt cheap.
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Unread 07-30-2010, 12:56 PM   #14
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Quote:
Originally Posted by emev0l View Post
Agreed, your best bet is to get that trans out of a RAM so it's easier to bolt up to your transfer case....
Is there a version of the 545rfe that the 231 does not bolt up to?

I would think they all have the same common 6 bolt pattern that is used in all Jeeps and Dodges.
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Unread 07-30-2010, 02:24 PM   #15
Toms87
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Quote:
Originally Posted by Crashwhitehouse View Post
Well I was reading something about a new gauge cluster that will fit the dash made for GM engines? i might be thinking wrong on this but im not sure.
Maybe there is something for TJs but I am using gauges from autozone bolted to the bottom of my dash.

To get the factory tachometer to work, I'm considering one of these
http://www.dakotadigital.com/index.c...rod/prd127.htm
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