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Old 10-25-2011, 04:51 AM
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WK05 4.7 swap to 08 SRT8 6.1

G'day All,

Firstly I hope Im posting in the right place, am looking to do a conversion on my 05 JeepGC WK (well actually WH here in Australia) Laredo from its 4.7 to an 08 SRT8 6.1, now it will be a full drivetrain swap, engine,trans,diffs, brakes, suspension, computers etc, also full SRT interior and eventually later exterior as some of the donor car is damaged from its accident, so not fussed about the exterior and I kind of like the idea of laredo with 4.7 badge hiding an SRT8 drive train underneath, the proverbial wolf in sheeps clothing.

Why? basically its (alot)cheaper to do a swap from a donor than trade up to a running SRT8.

Im hoping there maybe someone here thats done this conversion that may have some hints on similarities, whats compatible, whats not, like wiring looms, cooling system, steering components, are they uniform throughout the wk model and therefore no need to swap. So far most of the SRT conversion info Ive come across for JGC has been for exterior appearance swaps/upgrades.

Anyhow, appreciate any thoughts,ideas.

Cheers
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Old 10-25-2011, 06:26 AM
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Re: WK05 4.7 swap to 08 SRT8 6.1

you will be the first with the drivetrain.....but since you have a donor...you should be good to go.
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  #3  
Old 10-25-2011, 10:20 AM
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Re: WK05 4.7 swap to 08 SRT8 6.1

Quote:
Originally Posted by jeep6snake View Post
G'day All,

Firstly I hope Im posting in the right place, am looking to do a conversion on my 05 JeepGC WK (well actually WH here in Australia) Laredo from its 4.7 to an 08 SRT8 6.1, now it will be a full drivetrain swap, engine,trans,diffs, brakes, suspension, computers etc, also full SRT interior and eventually later exterior as some of the donor car is damaged from its accident, so not fussed about the exterior and I kind of like the idea of laredo with 4.7 badge hiding an SRT8 drive train underneath, the proverbial wolf in sheeps clothing.

Why? basically its (alot)cheaper to do a swap from a donor than trade up to a running SRT8.

Im hoping there maybe someone here thats done this conversion that may have some hints on similarities, whats compatible, whats not, like wiring looms, cooling system, steering components, are they uniform throughout the wk model and therefore no need to swap. So far most of the SRT conversion info Ive come across for JGC has been for exterior appearance swaps/upgrades.

Anyhow, appreciate any thoughts,ideas.

Cheers
Lucky dog you are if you got a good deal on a donor. Whered you get it and mind pmming what it ran you just for references sake? I was close to pulling the trigger on one in hopes of doing the same but it was too costly to get it and then have all the electrical and programming done and all the headaches just wasnt worth it

I have the rear and the tcase and front carrier in my garage just sitting waiting for a day. I may swap the front/rear diffs in just for the 3.73s but well see

Anyway on my journey i found ton of adversity but didnt stop me from doing what I wanted and hasnt so far haha. Everyone will tell you its not worth it but if you know what your doing and can get a good deal on a donor assuming everything works, it can be done for relatively cheap, again all depends on donor and what you paid and then what kind of resources you have local to you.

Just for reference though, nice SRT8s are going for under $30k so if you traded your 4.7 in on a lightly used SRT8 then you could likely be into an SRT8 for a few hundred bucks a month if you finance it over 60mo or so and have decent credit. So whether or not this kind of project makes sense all depends on your financial situation and how much of a headache you want to deal with

Lets just say it isnt going to be any easy swap. The suspension/brakes will be the cake but swapping the motor/driveline and all electrical is going to be a headache if you even have the resources to get i done.

Some things to know though - (California laws) - I know NJ follows this closely but emission are only real issues. You cannot put an older model motor in newer car though legally to my knowledge or it will fail inspection and you wont be able to register it. I know NJ isnt nearly as bad as Cali but heres there rules for reference:


Overview
Engine changes continue to present problems and challenges to car owners and technicians. Here are some tips to keep you and your customers on the straight and narrow.

Our recommendation is to rebuild and reinstall the original engine, transmission, and emission control configuration.

When rebuilding an engine, it must be rebuilt to the original equipment specifications. However, if you do decide to change the engine, these guidelines must be observed to ensure that the vehicle will be eligible for smog certification or registration.

Remember, these are guidelines for performing engine changes -- not certification procedures. All exhaust emission controlled vehicles with engine changes must be inspected by an official referee station and must have a Bureau of Automotive Repair (BAR) Vehicle Identification Label affixed to the doorpost.

Remember also, state and federal anti-tampering laws generally prohibit any modification to the vehicle's original emission control system configuration as certified by the manufacturer. And, Section 3362.1 of the California Code of Regulations prohibits any engine change that degrades the effectiveness of a vehicle's emission control system.

California Certification
A federal Environmental Protection Agency (EPA) certified (federal or 49-state) engine cannot be used in a vehicle that was originally certified for California.

Certification Standards
Make sure the engine and emission control configuration on exhaust - controlled vehicles are certified to the year of the vehicle or newer, and to the same or a more stringent new vehicle certification standard.

Classification
Don't mix engine and vehicle classifications which will degrade the emissions certification standards. For example, a heavy-duty engine cannot be installed in a light-duty exhaust-controlled chassis even if they have the same displacement. Non-emissions controlled power plants such as industrial or off-road-use-only engines may not be placed in any exhaust-controlled vehicle.

Computer Controls
If a computer-controlled engine is installed in a non-computerized vehicle, the "CHECK ENGINE" light, the Original Equipment Manufacturer (OEM) diagnostic link, and all sensors, switches, and wiringharnesses needed to make the system fully functional must also be installed.

Emission Control Configuration
Mixing and matching emission control system components could cause problems and is generally not allowed. Engine and emission control systems must be in an engine-chassis configuration certified by the California Air Resources Board (ARB) or U.S. Environmental Protection Agency (EPA). The engine must meet or exceed the requirements for the year and class of vehicle in which it is installed.

Emission Warranty
Voiding the vehicle manufacturer's emission warranty is not allowed.

Engine Modifications
No internal or external engine modifications (cams, pistons, intakes, etc.) may be performed unless the parts are ARB-exempted or EPA-certified for use in the installed engine. Use the database on this site to search for aftermarket parts covered by ARB Executive Orders.

Original Equipment
The installed engine and host chassis must retain all of their original emission control equipment. Diesel-to-gasoline conversions must have all gasoline engine and chassis emission control systems installed (such as fillpipe restrictor, catalytic converter and evaporative emission system).

Smog Inspection
These vehicles must pass a complete smog inspection (visual, functional, and tailpipe).


First thing first, whatever state you are in, call your DMV and the your insurance and talk to them. Let them know EXACTLY what your plan is and see what needs to be done. From there once you know you can legally do it and have clearance Id begin looking into the technical side of it.

You will want a reputable Jeep dealer who has serviced and knows the SRT8s on hand as well as a tuner such as Diablosport (call Johan) or someone even over at BG (call Dave) Also want a drivelien guy (call Bill at Paramount Performance or even Eddie at Southern HotRod) Even an aftermarket shop who deals with LX stuff would be of good help in the process (PWR in Virginia area - call Andy) From there youll have a much better network of the help you are going to need if you are serious about making this work.

This isn't just some shop swap you want to do with a few buddies. So unless you are super familiar with the can-bus systems and the SRT8 Jeep specifically, I wouldn't get too far into it without talking to some guys and getting familiar with it first GL with the swap and keep us posted
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Old 10-25-2011, 10:44 AM
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Re: WK05 4.7 swap to 08 SRT8 6.1

check out lxforums. they do 6.1 swaps for 3.5 etc in the lx cars. lots of writeups and even step by step.

you will need to do lots of wiring harness updates and basically convert everything. if you are thinking a half this/half that I think you will have issues.

you will need starscan access for the 'puters.
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Old 10-25-2011, 09:18 PM
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Re: WK05 4.7 swap to 08 SRT8 6.1

Wow,
Thanks for the input guys, but I better clarify, as when I registered I did'nt quite have enough time to fill some basic details like, I'm in Australia, precisely Perth, Western Australia!
But, hey, some good info,tips, will check out the lx forums and soontobe's contacts for any tricky stuff.

As a comparison a good 08 SRT8 Jeep here with less than 30,000 miles will set you back aroud $50K , some are as low as $37K but will have more milage and be older. My 05 4.7 Laredo 60k miles is probably good for $20k, so up to a $30K top up to jump straight into an SRT thats an upgrade. Whereas the donor will owe about $16k straight up. As Ive had the Laredo from new, I know its an honest car with no damage and good service history as Ive done that myself, also good 4.7 engines are a premium here and hard to get, so there would be another offset of around $5k for the sale of the 4.7 alone. So from my perspective a cheaper way to go.

The SRT has about 18k miles on it, is turn key, still drives/steers/stops perfectly, everything works turns on and functions correctly, all 4 doors/gaps,wheels and bonnet are perfect, unfortunately mainly the rear(got tailgated!) and bit of front(not including the diffs) have been damaged to the point where its been written off(more due to cost rather than damage severity), and even though I look at it and say, "its an easy fixer" the vin is cancelled, and the car is not be allowed to ever be repaired and re registered.

I'm thinking given the donor is a runner, it would be a case of a full strip down and swap everthing, wiring harness, dash/instrumentation,airbags, steering col, interior, computers and drivetrain, from one to the other, both cars are the same colour so the doors would even swap over as a complete unit, so would I be right in believing it should end in a turn key result with no re programming of computers. Once I pull the power on the SRT and then hook the battery once in the Laredo and its swapped and complete, all being the same, the computer should'nt know any different from any other start up irespective which car its in.
I think if trying to blend components, say wiring looms(or parts of) or switches/airbags may result in the computer(s) not recognising certian components that may just be slightly different from one to the other, as mentioned using the SRT doors as opposed to using the laredo doors and their elecy bits, you have two different models and built 3 years apart, whats the chance of something being even slightly different?

Thanks again.

p.s A bit off track, Why is the towing rating for an srt8 jeep so low compared to my Laredo? Ive heard things like the tyres cant cut it, the trans cant do it, the shocks are not rated, man this thing is a beefed up Jeep, not the other way around. If it can handle over 400hp, then the trans in my book is good to tow at least the same as a Laredo, same with suspension, and brakes, diffs. Its got the same traction,esp, and other anti crash functions as well, can I get a real answer?

Cheers
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Old 10-25-2011, 09:35 PM
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^ I believe its the fact that the gearing in the SRT is different from the normal jeeps, plus the suspension and tires and such

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Old 10-25-2011, 09:40 PM
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Re: WK05 4.7 swap to 08 SRT8 6.1

the racers can tell you that the driveline is the weak link. thats prolly why towing is lower than regular WK.

the suspension is almost the same except for spring length and shocks. and stiffer sways.
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Old 10-26-2011, 12:12 AM
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Re: WK05 4.7 swap to 08 SRT8 6.1

Diff gearing is same 3.73 as Laredo, is the driveline inferior for a 400hp beast than it is for a 4.7 family bus? do they fit weaker tailshafts? as mentioned the springs,sways and shocks will most certianly be shorter and stiffer, to me this is good, but it doesnt add up.
We generally consider any vehicle that has upgraded components like sways,shocks and springs even if its lowered, bigger/better brakes or has a trans beefed to handle more hp and apart from better performance,handling/braking is so that it can handle a higher towing capacity.
If its just the tyres, well thats no biggy, but all the other stuff the srt ticks all the boxes as a good tower, its an upgraded version in all aspects to what I have that tows effortlessly as is in stock form.
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Old 02-28-2013, 01:42 AM
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Re: WK05 4.7 swap to 08 SRT8 6.1

nice article dude!! Bump to the top for any new'er updates?
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Old 09-30-2013, 04:56 PM
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Re: WK05 4.7 swap to 08 SRT8 6.1

Quote:
Originally Posted by jeep6snake View Post
G'day All,

Firstly I hope Im posting in the right place, am looking to do a conversion on my 05 JeepGC WK (well actually WH here in Australia) Laredo from its 4.7 to an 08 SRT8 6.1, now it will be a full drivetrain swap, engine,trans,diffs, brakes, suspension, computers etc, also full SRT interior and eventually later exterior as some of the donor car is damaged from its accident, so not fussed about the exterior and I kind of like the idea of laredo with 4.7 badge hiding an SRT8 drive train underneath, the proverbial wolf in sheeps clothing.

Why? basically its (alot)cheaper to do a swap from a donor than trade up to a running SRT8.

Im hoping there maybe someone here thats done this conversion that may have some hints on similarities, whats compatible, whats not, like wiring looms, cooling system, steering components, are they uniform throughout the wk model and therefore no need to swap. So far most of the SRT conversion info Ive come across for JGC has been for exterior appearance swaps/upgrades.

Anyhow, appreciate any thoughts,ideas.

Cheers
i support you man every body always say trade it in but my jeep might get 15k out of it, it has 150k miles on it so im gonna drive it till it dies and hopefully find an srt8 to do the swap. try and do alot of writeups if you can for future people who want to do the swap. good luck
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