4.0 to 3.7 V6 swap

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
Thanks for this tip on motor mounts. I’ll save that info just in case.
I think it’s gonna be okay but good to have options


Sent from my iPhone using Tapatalk
 

JimC

Senior Member
Joined
May 5, 2007
Posts
2,242
Reaction score
588
If a coyote fits in an 07 without issues, I think the cyclone should be fine.
Let us know!
The problem isn't with it "fitting" into the engine bay. The 3.7 has a very narrow profile so the engine is taller than the 5.0 and then the 2007 hood might not fit
 

Juice

forum member
Joined
Aug 24, 2017
Posts
4,622
Reaction score
1,904
The problem isn't with it "fitting" into the engine bay. The 3.7 has a very narrow profile so the engine is taller than the 5.0 and then the 2007 hood might not fit
I thought the cyclone was a coyote less two cylinders?
 

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
I hooked up the battery just to check things out. I didn't try to start it yet, I have no gas in it and no exhaust yet. I still need to add coolant also. Anyway, I found that the doors need the harness's swapped. Long story short, everything inside the doors is pretty much different. I had to swap the window motor from the 12 onto the 07 regulator. I had to change the window switch and the door latch. So now I have the drivers side door all converted over including the door lock so the 2012 key works in the 07 door. Now I have to do the passenger door!
 
Last edited:

mattjames

Member
Joined
Dec 16, 2013
Posts
125
Reaction score
63
Admire your drive, but I feel like you could've treated this like a Coyote swap and how I did my 07 GT Coyote by merely hard wiring the body connector at the PCM and everything will work, like AC Cruise etc.
 

whitmanink

Member
Joined
Dec 28, 2020
Posts
204
Reaction score
41
Location
denver pa
Admire your drive, but I feel like you could've treated this like a Coyote swap and how I did my 07 GT Coyote by merely hard wiring the body connector at the PCM and everything will work, like AC Cruise etc.

so your saying if i got a gen 1 5.0 and pcm i can rewire it too work as is? i did see your links for youtube ( quite the work if you ask me) but well worth it, i just didnt know cuz i saw where you said it was like $3500 without the motor?
 

mattjames

Member
Joined
Dec 16, 2013
Posts
125
Reaction score
63
so your saying if i got a gen 1 5.0 and pcm i can rewire it too work as is? i did see your links for youtube ( quite the work if you ask me) but well worth it, i just didnt know cuz i saw where you said it was like $3500 without the motor?
Yes. Exactly what I’m saying. And the 3500 was mostly other parts like headers etc. the wiring would almost be nothing but you do have to buy some harnesses etc anyways. Way cheaper than buying a 2000 control pack and then still having to wire it
 

whitmanink

Member
Joined
Dec 28, 2020
Posts
204
Reaction score
41
Location
denver pa
Yes. Exactly what I’m saying. And the 3500 was mostly other parts like headers etc. the wiring would almost be nothing but you do have to buy some harnesses etc anyways. Way cheaper than buying a 2000 control pack and then still having to wire it

man now im looking at 5.0 as we speak lol , just a little too pricy for me yet as i want to get my car back on the road asap,, but i do see this going to happen very soon
 

Juice

forum member
Joined
Aug 24, 2017
Posts
4,622
Reaction score
1,904
Since its now basically a '12, a 5.0 swap would be way easier than what Matt and I did. lol Should be practically plug&play.
 

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
well I am not confident in rewiring stuff so I figured I could just swap the wiring itself. Which is what I have done. I bought the 2012 for $1300, sold my 4.0 auto trans for $500 and variaous other parts like the wheels from the 2012 and so I have hardly any money in this swap. Just my time. I work on it on the weekends for a few hours. I hope it will run!
 

Juice

forum member
Joined
Aug 24, 2017
Posts
4,622
Reaction score
1,904
well I am not confident in rewiring stuff so I figured I could just swap the wiring itself. Which is what I have done. I bought the 2012 for $1300, sold my 4.0 auto trans for $500 and variaous other parts like the wheels from the 2012 and so I have hardly any money in this swap. Just my time. I work on it on the weekends for a few hours. I hope it will run!
It should run just fine.
Giter'done!
 

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
I was able to get the GT front sway bar installed, driveshaft and shifter also installed. I started on the exhaust. I had a aftermarket mid-muffle dual exhaust on the 07 4.0L so I am combining the 2012 dual exhaust with that kit. I need to make a few tweaks but it should work.
Image - Copy (237).jpeg
Image - Copy (236).jpeg
 

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
well, I got it far enough along to try and start it. I am getting no crank. Relay in BEC/BJB clicks. Fuse 27 in SJB is good. I'll continue to try and track it down. Very frustrated... Hard to test circuts by myself!
 

Juice

forum member
Joined
Aug 24, 2017
Posts
4,622
Reaction score
1,904
well, I got it far enough along to try and start it. I am getting no crank. Relay in BEC/BJB clicks. Fuse 27 in SJB is good. I'll continue to try and track it down. Very frustrated... Hard to test circuts by myself!

Get Forscan.
Its either the pcm not seeing crank reauest or a pats issue.
And jump the starter just to be sure it works.
 

TARA-fied1

Member
Joined
Sep 20, 2022
Posts
237
Reaction score
135
Location
Russellville, KY
Get Forscan.
Its either the pcm not seeing crank reauest or a pats issue.
And jump the starter just to be sure it works.
thanks, I am trying to test via the circuits to verify if it's a simple fix.
struggling with understanding the terminology. I know what the CPP is, and I know that the PCM connector C175T is the top one but I do not know how to identify the the Circuit CE903 (BU/OG)...
pinpoint test A engine does not crank.png
 
Last edited:

Latest posts

Support us!

Support Us - Become A Supporting Member Today!

Click Here For Details

Sponsor Links

Banner image
Back
Top