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Old 05-01-2015, 05:10 PM   #1
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4.0 to 5.0 Swap

Im trying to just list out the absolute necessary parts for a swap from a 2005 4.0 v6 to a new 5.0 v8. I know i will need the following

5.0 Crate Engine
New driveshaft
8.8 rear end
New transmission
new clutch and flywheel
All of the new electronic wirings

thats all i have on my list so far. im going to be building it piece by piece and then hopefully one day drop in the coyote. Is there anything else i will need? Will I need any new resiviors? I already have an aftermarket dual exhaust, but do I need to change out the pipes to larger ones? Any info would be great. Please dont tell me to just buy a GT. I want a fun project that i will work toward.
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Old 05-01-2015, 05:28 PM   #2
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4.0 to 5.0 Swap

Maybe suspension and brakes. Make sure your cooling system is compatible with the coyote, if you aren't upgrading the system. It might not need upgrading. My ideology is better safe than sorry. I think there's someone on here that's doing the swap; I could be wrong though.
What size pipes are on it?

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Old 05-01-2015, 05:31 PM   #3
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The transmission you have should bolt up fine given they are both mod motors. Personally I would replace the whole exhaust system because your dual will probably sound terrible on a coyote.
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Old 05-01-2015, 05:48 PM   #4
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I thought the transmission wouldnt be able to handle the torque? the exhaust i believe has a 2.5 inch diameter pipes and 4 inch tips. How would i be able to check if the cooling system works?
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Old 05-01-2015, 05:50 PM   #5
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It will bolt up. What transmission is it?
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Old 05-01-2015, 06:11 PM   #6
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What I mean is your current system maintains the temp. of the cyclone, a six cylinder. I would want to make sure the system is enough to properly maintain the heat generated by the coyote, a eight cylinder.


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Old 05-01-2015, 06:12 PM   #7
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Quote:
Originally Posted by The Great Recon View Post
What I mean is your current system maintains the temp. of the cyclone, a six cylinder. I would want to make sure the system is enough to properly maintain the heat generated by the coyote, a eight cylinder.


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He actually has the 4.0 which has a weaker cooling system
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Old 05-01-2015, 06:16 PM   #8
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4.0 to 5.0 Swap

That's right. Yeah, I'd definitely make sure your cooling system could handle a coyote.
And I think your pipe size is alright, maybe see if you need to change converters, and possibly mufflers.

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Old 05-01-2015, 06:46 PM   #9
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I think its a t-45 transmission. Where would i get a new cooling system? would my old resiviors still work?
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Old 05-01-2015, 06:49 PM   #10
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I also am just a college student. If I was to do all the labor myself, the entire thing would be a learing process. Should I just go find a shop who will help me with the project? Should I go to a custom shop, or a regular car shop?
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Old 05-01-2015, 06:49 PM   #11
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Quote:
Originally Posted by The Great Recon View Post
That's right. Yeah, I'd definitely make sure your cooling system could handle a coyote.
And I think your pipe size is alright, maybe see if you need to change converters, and possibly mufflers.

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Coyote may very well be 2.75 inch.
Also you should have the tr-3650 transmission.
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Old 05-01-2015, 06:58 PM   #12
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I have a 5 speed manual. According to the google, thats the t-45. Google may be wrong though.
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Old 05-10-2015, 01:19 PM   #13
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T-45 stopped in 2001. You have a 3650
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Old 05-15-2015, 08:18 PM   #14
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I thought the 4.0 V6 had the T5?


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Old 05-15-2015, 08:40 PM   #15
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You are going to need full exhaust, ECU, fuel pump, injectors, fuel rail, possibly different fuel lines, new throttle position sensor. All of that damn efi ****.

Or you could put a carb on it and an EDIS 8 ignition module with a megajolt, be unique, and be horsepower ahead.
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Old 05-15-2015, 08:42 PM   #16
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I'll be goddamned they did have them till 2010... eeeww... Well... actually the T-5 shifts so well and is 75lbs so that's a bonus behind a motor that won't blow it up.


The Coyote will blow it up.
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Old 05-15-2015, 08:47 PM   #17
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You can make the T-5 handle that power. Whats the main fail point on them? The housing gets stressed too much? If thats the case, then straight cut gears would eliminate the axial load that helical gears put on transmission cases.

If its the gears themselves that cant take the power, then straight cut gears are NOT a good alternative unless they are just straight up 3x more beefy.

Straight cut gears-- Easier on the housing because they dont make a thrust load
Helical gears-- The individual gears are stronger because more teeth are engaged and the load travels through the teath instead of across them
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Old 05-15-2015, 08:49 PM   #18
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Stock T-5s fail because the internals themselves are not very robust. Built ones can fail because the stock housing can be a bit flimsy at 500+hp. An Astro A5 gearset in a G-Force housing fixes both issues. And is $3000.


A fresh rebuilt T45 to 99-01 spec with a 26 spline shaft will take 600hp all day and is about $1800. Same deal with a 3650 but the 3650 doesn't shift quite as smooth although there are MASSIVE gearsets for the 3650 that are not available for the T45. That gets real pricey REAL fast tho.
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Old 06-08-2015, 07:44 PM   #19
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T5's were behind the old 5.0's and up to 2004 as i believe. I know the GT's had a few mix and matched transmissions per years, but t5 has been around a while
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Old 06-08-2015, 07:47 PM   #20
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Quote:
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T5's were behind the old 5.0's and up to 2004 as i believe. I know the GT's had a few mix and matched transmissions per years, but t5 has been around a while
The 2vs had the tr3650
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Old 06-08-2015, 07:52 PM   #21
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The 2vs had the tr3650
From 01.5-04 they did. From 96-early 01 they were T45s. IMO, the 99-01 T45 is the best 5 speed to ever come in a Mustang. Upgraded carbon fiber blocker rings, gears are stout and it has a single rail shift mechanism which makes for shifts damn near as smooth as the T-5.
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Old 06-08-2015, 11:58 PM   #22
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I know you said "don't tell me to buy a GT" but when you add up all the stuff you will need it will cost you a lot more. I'm done several engine swaps on different cars and it really never ended up being as fun as I thought it would be. I think the use of a cobra with the small body "Miata sized" with a ford v8 would be a lot of fun. I had a 14 v6 and it had some issues, finally resulting in ford replacing it. I bought the 15 GT and it's a lot better car overall. The new chassis feels a lot more stable and I think it could handle more power a lot better than my 14 would have. If you can buy parts off a wrecked GT and keep your cost down it may be fun. You would want better brakes as well as the engine parts. Good luck with your project!


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Old 06-17-2015, 08:24 AM   #23
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I was curious, but I have just decided to buy a gt when I graduate college. The thing with the gt is that I'm scared of the insurance cost. If I did a swap, the insurance company wouldn't know.

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Old 06-17-2015, 09:35 AM   #24
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This is going to sound like me being mean... but doing a V6-V8 swap because you don't want to pay the extra insurance costs is like THE WORST reason to do a swap.

Call around to see what sort of rates you get, depending on where you live you might be surprised.
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Old 06-17-2015, 10:11 AM   #25
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Re: 4.0 to 5.0 Swap

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Originally Posted by thevanman View Post
I was curious, but I have just decided to buy a gt when I graduate college. The thing with the gt is that I'm scared of the insurance cost. If I did a swap, the insurance company wouldn't know.

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Bad idea. If you're in an accident, two things that can happen are;

1. The adjuster finds out about engine swap, claim denied leaving you out of luck.
2. Insurance fruad...

Either of those will by far cancel out the money you may have saved by falsely representing the vehicle.
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Old 06-17-2015, 10:15 AM   #26
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4.0 to 5.0 Swap

As they've already stated. If you do this and when the insurance finds out, it won't end well. Just keep the car the way it is. When you graduate college, get a good paying job, and pay off your loans, then get a GT...
Risks outweigh the perks...

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Old 06-17-2015, 10:35 AM   #27
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Agree, the cost alone for the swap would be way more than what the increase cost of insurance on a GT would be. Even if it went up $200 a month that would not cover the cost of the engine alone.
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Old 06-21-2015, 08:46 AM   #28
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Quote:
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The 2vs had the tr3650
V6's pretty sure were t5's. I know up til 00 they were.
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Old 06-21-2015, 09:40 AM   #29
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Agree, the cost alone for the swap would be way more than what the increase cost of insurance on a GT would be. Even if it went up $200 a month that would not cover the cost of the engine alone.

This ^ don't look at the swap as a way to save for insurance. You will spend way more in the long run on the swap than on increased insurance.


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Old 06-21-2015, 09:41 AM   #30
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Cheaper to just get the gt


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Old 06-21-2015, 10:37 AM   #31
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Ageed although a 05-09 body style with the Coyote power plant is pretty cool. Read a build thread over on SVTP for one but that guy 's father owns a speed shop and he makes a ton of money working for pops and has the resources and tools to do it easy and quickly and the car came out badass.

But even he stated he was in the car like $10k over what a nice 11-14 GT would have cost. He just did it because he could and it was HIS car.
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