Cj7 4.0 swap updates and questions - JeepForum.com
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post #1 of 57 Old 03-29-2019, 10:09 PM Thread Starter
Mrflyingdonut
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Cj7 4.0 swap updates and questions

This will be the last thread I make for this swap, I'll be posting updates along with any questions I get.

Info on the swap
1981 cj7
Remanufactured 1994 4.0
1994 Cherokee wiring harness from eBay
T176 trans

Here's some pictures of my progress so far.

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post #2 of 57 Old 03-29-2019, 10:13 PM Thread Starter
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Trying to figure out if I have the right parts for the distributor and coil pack. I ordered this coil pack and I can't find a plug on my new harness that matches

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post #3 of 57 Old 03-29-2019, 11:13 PM
trailhead2004
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Originally Posted by Mrflyingdonut View Post


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Since you're in this far have you considered, or do you even want to, putting a Chevy Blazer heater blower motor in? With this much sheet metal off the front end it would be really easy to make that hole bigger and get much more air flow from your heater and defroster.

The new motor is between $20 and $35 from Rock Auto. They have relatively expensive motors too, $50 to more than $60, if you desire. But the VDO motor I picked up 10 years ago is still going strong, about $25 now.
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post #4 of 57 Old 03-30-2019, 09:15 AM Thread Starter
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Originally Posted by trailhead2004 View Post
Since you're in this far have you considered, or do you even want to, putting a Chevy Blazer heater blower motor in? With this much sheet metal off the front end it would be really easy to make that hole bigger and get much more air flow from your heater and defroster.



The new motor is between $20 and $35 from Rock Auto. They have relatively expensive motors too, $50 to more than $60, if you desire. But the VDO motor I picked up 10 years ago is still going strong, about $25 now.
Wouldn't be a bad idea

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post #5 of 57 Old 03-30-2019, 08:58 PM Thread Starter
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I still haven't been able to find info on the coil pack plug

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post #6 of 57 Old 03-31-2019, 05:20 PM
Wallace85Cj
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I think youíre missing a piece of the harness. Iím doing the swap and building a stroker right now. This is what was connected to the coil and ends up connecting into the harness.
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post #7 of 57 Old 03-31-2019, 05:53 PM Thread Starter
Mrflyingdonut
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I think youíre missing a piece of the harness. Iím doing the swap and building a stroker right now. This is what was connected to the coil and ends up connecting into the harness.
That must be it, I don't have that piece, guess I'll be making another trip to pull a part

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post #8 of 57 Old 04-01-2019, 05:03 PM Thread Starter
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Update: just took the top cover off the transmission to check out the shift forks and found the interlock disks and pin and a detent missing

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post #9 of 57 Old 04-01-2019, 05:08 PM Thread Starter
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Anyone know wherei can buy the interlock pin and disks?

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post #10 of 57 Old 04-01-2019, 08:29 PM Thread Starter
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I found the pin on Morris 4x4 but still can't find the interlock discs

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post #11 of 57 Old 04-03-2019, 10:06 AM Thread Starter
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Starting to think I won't find the interlock discs

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post #12 of 57 Old 04-06-2019, 07:59 PM Thread Starter
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I found the interlock rings from a guy in Texas


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post #13 of 57 Old 04-06-2019, 08:00 PM Thread Starter
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Originally Posted by Wallace85Cj View Post

I think youíre missing a piece of the harness. Iím doing the swap and building a stroker right now. This is what was connected to the coil and ends up connecting into the harness.
Any idea where I can get that, I went to pull a part today and every Cherokee I checked had this part of the harness missing.

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post #14 of 57 Old 04-07-2019, 05:06 PM
Wallace85Cj
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I have no idea. I got the engine and the harness from the same donor Cherokee that a friend had.


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post #15 of 57 Old 04-08-2019, 03:23 PM
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Any idea where I can get that, I went to pull a part today and every Cherokee I checked had this part of the harness missing.

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Do you still have the alternator on the 4.0? Part of the harness shown is the alternator connections and wiring so you may have some of it. The rest you may be able to get the plug pigtail for the coil and wire it in yourself...

Also did you ever figure out the flywheel you were going to use? I know a while back you weren't sure what to use.....may have already figured that one out but thought I would help out if not....may have answered that one on another of your threads...I have been talking with several members on here since we are all doing similar swaps or have done them so it all gets blurry after awhile.....anyway if you are going with the CPS in the bellhousing then you have to use the flywheel from a 4.0 as the CPS reads it. Stay with your clutch set (or new one ) for your CJ tranny.

'84 CJ7, 44, 14 bolt, twin stick 300, 109"whl base, 4 linked
'93 XJ Cherokee
'70 CJ6 Dauntless v6
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