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Old 07-17-2019, 02:30 PM #1
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2002 4Runner Sport V8 swap

I have a 1998 lexus gs400 with a clean and strong engine 116k miles. Can I swap that into a 2002 sport edition 4Runner? What would be involved? What would be a good cost to let some do the swap? Tanks!
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Old 07-17-2019, 03:46 PM #2
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Is that one of the years the GS400 had the VVTi motor? If so, it has an A650e 5-speed trans behind it that was never put in a 4WD vehicle... so no adapters exist to make it 4WD (I think a guy did a custom one once).

Otherwise, look up any of the 1UZ or 2UZ swaps on here to get an idea what is involved...

-Charlie
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Old 07-18-2019, 01:16 PM #3
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Sell the engine and use the proceeds to put a supercharger on it and you have V8 power for a whole lot less time and work.
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Old 07-18-2019, 04:19 PM #4
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I mean this in the most respectful way possible and am saying this with a smile:
If you have to ask what's involved... you ain't ready

haha, all jokes aside.. A LOT is involved. Like.. a ton.

If you paid someone to do it, i'd expect maybe $4-5k labor alone. And that could be the low end.

You will run into snags and a million little problems/roadblocks with an engine swap. Doing it yourself requires an extensive working knowledge. Not saying you dont have it, or cant do it-- you may be able to! But your truck will be down a long time and it will make you want to cuss and forget the idea altogether.

That said... I want a V8 3rd gen so badly!
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Old 07-18-2019, 05:00 PM #5
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If you have to ask you shouldn't be doing the swap. Just S/C it like gamefreak said and move on.
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Old 07-18-2019, 08:51 PM #6
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Quote:
Originally Posted by gamefreakgc View Post
Sell the engine and use the proceeds to put a supercharger on it and you have V8 power for a whole lot less time and work.
Agree with this. Unless you are looking for a challenge/side project.
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Old 07-18-2019, 11:09 PM #7
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A roaring v8 in a 3rd gen would be badass. I'm buying the 3rd gen next months and already have the gs400 and thought why not. I guess a supercharger would be less hassle.
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Old 07-19-2019, 12:32 AM #8
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A roaring v8 in a 3rd gen would be badass. I'm buying the 3rd gen next months and already have the gs400 and thought why not. I guess a supercharger would be less hassle.
If you are itching for a project and have welding skills, it could be a great project and rewarding. But if you don't have the skills/abilities to troubleshoot wiring, mounts, mating the transmission, etc. it will turn into a real headache.
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Old 07-19-2019, 12:19 PM #9
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Getting a transmission that will mate to the 1uz isn't much of a problem (there is an A340 bellhousing, etc. that works) - just then the (factory) ECU for the 1uz VVT-i wouldn't be able to run the transmission (its expecting an A650e, not an A340e/f). So, I suppose if he is ready for a standalone trans controller AND a standalone ECU, it'll work. The other option is the OEM 1uz/a650e ECU and custom adapting the transfer case.

Either one is a bigger challenge than finding a more appropriate donor vehicle.

-Charlie
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Old 07-21-2019, 06:29 PM #10
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Sounds like OP has the complete donor car. I'd swap the whole drivetrain and electronics, use an oil pan and oil pump pickup from a 4WD 2UZ. I don't know if there's an existing trans rear housing that'll adapt to the 3rd-gen transfer case, since Aisin didn't have a 4WD variant of the A650 series.

From what I've read here a UZ swap into a 4WD 3rd-gen requires a body lift to clear the front diff and steering shaft. For example GreenbowCounty's build up!
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