WHY I didn't LS swap my jeep XJ toyota 1uzfe swap
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- Опубликовано: 10 сен 2022
- In this video we swap a 1uzfe engine from a 1997 ls400 in my jeep cherokee.
I did this because my old 4.0 was really tired and i needed more power on and offroad. The 1uz ended up being the perfect choice because i was able to keep the stock transmission.
There will be many videos of this thing ripping to come. 
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Great video showing the XJ's adaptability. Considering AMC designed the XJ for an inline 4 or V6 for release in 1984 (nearly 40 years ago!), this shows well how versatile the design really was. Over 2.5 million XJs were built with most since 1987 having one of the over 5 million 4.0L engines built during the '87-'01 XJ run with the 4.0L terminating at the end of '06. Too bad Chrysler killed its most successful SUV wagon model.
it really is a great platform to build from
The 4.0 isn't a V6. It's an inline 6.
@@KurNorockamc offered a Chevy V6 for the first few years of production.
Glad to see someone actually document this swap, i’ve had a 2uz with an awd transmission/case out of a tundra for a few months now for my MJ.
that’s awesome any video of it?
Not yet! I plan on recording the entire swap once i have almost everything i need, im just doing research and hoarding parts atm haha
@@plzdntkillmeinc2016have you completed your swap.
I was thi for about using a 2UZ from a Sequoia
Who else loves their xj!?
Awesome swap guy's especially in a small shop with basic tools. Sound like you need to make a turn key junkyard swap kit for all the faithful xj owners out there
Hey thank you so much, the goal of our channel is to show what you can do in your garage! a swap kit would be awesome
If I decided to do this and I had issues..... guarantee I would...😂 Could ask you guys for some help.
I just happen to have a complete 01 xj drivetrain in the garage AND a 1uz motor & trans that I pulled from my 97 LS400 that I wrecked. I had no idea the transmissions were nearly the same or that this swap was nearly a direct bolt up. Looks like it’s time to find another good xj shell! 🤘
we would be happy to share our tunes to get you up and running
@@gageboysgarage6059 That is extremely appreciated! I will reach out once I’ve secured a shell
@@gearhead8989Are you interested in selling the engine?
@@autohog I’ve debated on selling it but haven’t made any effort to list it. It’s very healthy. If I had a good enough offer, I might consider it.
Once I have finished my diesel Jeep xj I will be converting my 4.0 prefacelift to this engine. Its legendary.
heck yeah buddy i love mine. thanks for the comment
I owned a 91 ls400. Love to put one in my 88 YJ
Awesome Swap! I never knew about the 1UZ to AW4 compatibility. You should do an overview of the whole jeep. Mention all the mods, etc. Looks awesome.
Thanks! i have thought about this and will probably do it soon.
Man this is very tempting to do on my LJ one day :D
Id love some more power and more gears compared to the 42rle !
Would be cool to add a supercharger since there's a TRD kit for that motor im sure
Need more xjs with this swap.....wish I was good enough to do one to my 92
you could definitely do this swap it wasn’t bad just takes time
Need a video on wiring and what to run what to im so confused how to wire it all up to work
Could you maybe do an index video of the wiring for the 1uz?
Love the 1uz. Nice work. Wonder if it would fit my 4.0/ CJ7bell housing/NP435 😅
Thank you man! I think a 1uz CJ7 would be so badass!!!
Another great XJ video man, TYVM! You've re-ignited the fire in my build but what a curveball this engine is. Now that I've had a sec to get familiar with it, I'm torn between them. How familiar are you with these? LS engines are so simple seemingly in comparison, can you diagnose/repair these multicam V8's? Repair costs similar to LS internals? How did you pick out which version to start with? They sound like pretty badass platforms. Does it really allow 8500 rpms w/o catastrophic failure? Damn, I have so many more general XJ build Q's, doubler, axles and so on. Is there a better way to try and bounce Q's off you guys? I'm a 54 year old man, not some freak you RUclipsrs get plagued with so don't be feared! LOL Thanks again Gage Boys Garage, looking forward to helping you guys grow n prosper.
WOW thank you so much for the comment. i believe the Toyota engines are relatively simple everything i’ve done on mine was very easy. you should message me on instagram if you have it dm zeph_gage. if you don’t have instagram let me know
Part of the problem with using an LS is having to use a GM transmision... or is there a way around that? Of all the 4L60 transmissions I have seen die, I have seen zero AW4 failures.
I expect the aluminum Toyota V8 to weigh substantially less than the LS.
The LS is a simple engine, but so is the Toyota engine, and honestly, its liable to be more durable than even the GM LS engine.
The Toyota engine is just as cheap.
With keeping the AW4 transmission, there's no need to change anything with the transfer case.
The original driveshafts can be retained... unless that is also true with the LS swap?
I am leaning towards going this route. Its going to be either that or I cam up my 4.0. But for that to be effective, I should get a better flowing head as opposed to the Daimlerized one that is on there.
G'day mate , great vid by the way,, im here in Australia looking at a very low mileage 1uz that I had in a valiant but now i have an xj that could use an upgrade , what mounts did you use for the engine ? Also you mentioned that you moved the gearbox forward , did you have to extend and shorten front and rear prop shift ? You make this look so easy I am going to give it a go
yes i had to change the driveshaft length and make motor mounts but it was relatively easy, btw so cool to hear from an Aussie Thanks for Watching!!!
That was the one thing I was wanting to know was how the wiring went cause I have been back and forth with wanting to do a motor swap but wiring is what worries me the most. I have an 01 and love the XJ setup but wouldn't mind having something with a little more power and do something different.
i hate wiring, but once you get into it just take your time. it’s nothing to be scared of
@@gageboysgarage6059 so with the fuel pump did you guys just go right into the other setup? cause honestly this build is something can seems to be better vs an LS.
@@gageboysgarage6059 also where did you get the harness kit?
Cool swap! October 16th is our fall color run. You should bring it up and show it off! Lol
Where is the ride? Sounds fun
@@gageboysgarage6059 starting in Petoskey. Hitting about 40 miles of trails. Ending just south of Boyne Falls.
@@northernmichiganxjsoverlan3326 are you organizing this on facebook or anywhere that we can get details?
@@gageboysgarage6059 yes on my #NorthermichiganXJs group I have a event.
I read some say that the engine and trans need to be moved forward or the firewall moved back. Was that true in this case?
Love the vid!! What standalone ECU are you using? Looking at possibly doing this swap on my XJ!!
i used the splitronics ecu and harness
Sweet build where did you get the engine mounts
i made them
Did you have to use an aftermarket TMC for you transmission or does the ECU still control it? Fyi there's a wire in to spitronics and you can adjust the oms in the ECU to match the tach no need to spend money on it just a simple wire
the jeep has a separate computer for the transmission from the factory, and the problem with the tach is relaying what the splitronics knows to the dash because the dash is controlled by the computer
I wonder if you can just use a gm alternator with the tach and just wire that into the old computer or if you can use the pulse off the alternator that came with the ls for the tach signal to the old computer
Man, great job! How many hours did the swap take in total?
probably a month after work and school
Hi awesome swap ! , from where you engine mounts bracket
I made them, I used part of the factory engine mounts. it was actually extremely easy
I have a 04 Jeep Grand Cherokee with the 4.7 V8 and the 45RFE 5 speed transmission. Do you think this would bolt up like yours did by just swiping the bell housing and input shaft?
i don’t think it would work
I am looking to do an engine swap on my xj to live and work on the road. Has this been reliable and if so, may I hit you guys up for questions and concerns. I have done 3 engine replacements on my xj so have some knowledge. Thanks in advance
yeah ask any questions you want, this has been very reliable watch more videos on our channel you’ll see the beating it takes. i highly recommend the swap
The old engine in your xj sounds leagues better than my 4.0. I’ve been thinking about the 1uz. How has it held up?
so far it has been bulletproof, only thing i had fail was the starter, i was able to smack it with a bar to start it once and then i left the jeep running
Would you have been Able to use the engine and the transmission from the Lexus with the stock transfer case from the jeep??
i don’t think so, the a340 from the car is a 2wd case
What trans is in the xj is it the ax? Or 42re as if its the 42re ill do this to my grand cherokee!!
it is the stock cherokee aw4 automatic
Do you have to change the pump, or could you use the xj torque converter?
the xj torque converter does not match up with the 1uz flex plate you would have to modify something
Do you think the manual transmission form the same year xj would bolt
up to the 1uz?
i’m not sure
I have a 96 Cherokee. Would this transmission change over work on this model possibly?
i think so i don’t know tho
Mpg?
I assume you are using the stock Jeep ECU to control the transmission, has there been any issues with that? Did you need to do anything else to make that work properly? Also, did you find anything to enabling the tach to work with the 1UZ?
yes stock transmission computer, i haven’t done anything with it but hook up the transmission cable to the throttle body and it drives great. i have not get the tach to work yet but i plan on making a video on it
@@gageboysgarage6059thanks for the info, I was wondering the same
imagine the starter going out on the trail
it kinda did, luckily i was able to smack it to get it started then i just left the jeep running!
Hey what stand alone ecu did u use for ur swap
i used a splitronics ecu and harness.
Bro wishes he was uncle Tony’s garage
who the heck is uncle tony?
Were you able to get it tuned with the spitronics ecu? If so, could i by chance borrow that tune file 😁
yes i can!!
What's the best way to get in contact with you for those files?
@@gageboysgarage6059 what's the best way to get a hold of you for those tune files? Thanks in advance!
@@avianaviator1570 send me an email zeph.gage@me.com
@@gageboysgarage6059 Thanks So much!
What stiffners did you go with?
they are just cheaper ebay ones, they are all very similar
Dude whats kind of engine mount u used thinking to swap my jeep engine
i used the factory mounts cut them down and welded a flat plate off of them, then added gussets. the 1uz has a very simple engine mount on the engine
Would the parts of the 1uz tranny fit in my 93 xj cuz urs is newer then my jeep so I guess tranny is a bit different
@@radhaalghurab9753 i’m not positive but i think it may work
How'd you end up doing your cooling?
The mechanical and electric?
That looks like the stock XJ radiator?
stock xj aluminum radiator 3 electric fans
Can you send me te link to the harnes you used
Yeah man here it is. What are you swapping ?
www.ebay.com/itm/234738260717?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=9i8opuuftpa&sssrc=2047675&ssuid=&widget_ver=artemis&media=COPY
@@gageboysgarage6059 also A jeep Cherokee but I have A 3 door with original 2.1 diesel which I threw out and swapt with 1uz
Does a 3rd gen VVT 1UZ work in this too? Or just 1st and 2nd gen without VVT?
it should work
Damn it had a 4.0 and it still got a 4.0
hell yeah
@@gageboysgarage6059 I never knew the OG trans in the XJs was an Aisin. That means you unhooked the 1UZ from an Aisin and also reattached it to an Aisin!
So how did you end up controlling the aw4? I saw that it bolted in but are both electrical plugs going to the aw4 (behind the head on a 4.0) still going into the xj harness unmodified? Thats my biggest fear in this. And what conversion harness did you use
The aw4 has its own computer i just left it alone and it works great. The engine harness is a simple 3 wire harness from splitronics standalone ecu and harness. I kept the factory jeep computer and used the jeep sensors to get my dash to work
@@gageboysgarage6059 so just continuity out all the wires in the tcm plug and leave them where theyre at correct? What about the kick down cable? As far at the motor is concerned im probably going to make the toyota ecm run it all and start depinning the ecm until it no longer works and start adding back in.
@@bransencortez7353thatsmy thoughts. Did you do the 1uz swap and how did you address this?
@@user-ho4xq1io6s no said screw it. I wanted a entire parts vehicle and the toyota people were nuts with their prices so i found it cheaper and easier to run a 5.3 with a 4l80e and a 2k$ holley controlling it all. When you want to run a auto things get kind of confusing so this worked best for me. Since hes already running a standalone on his xj i said why not to the same thing.
@@user-ho4xq1io6s that being said my buddy has a uz swap with a stick and its a MUCH easier animal. All my other vehicles are stick and i just want this to be my daily so i wasent willing to give up the auto in this one. If you are tho this is a great swap!
1UZ motors are bulletproof
How difficult would it be to add a duel exhaust to this swap
depends how your jeep is setup with a stock ish xj it would be easy
@@gageboysgarage6059 Yea mine is a 1994 Sport I already got the engine just gotta get the most complete swap kit
@@gageboysgarage6059How long did it take to complete the swap , and would you be interested in doing another swap if I got all the parts everything you need how much would you charge me to complete the swap set up exactly like yours
So does this mean you could put a 2jz in a xj because you could get that auto trans in a supra
yes technically i have seen it done
No AC?
not at the moment, the factory ac location will hit the frame
could have went with a buick 350 fit right in and give you way more torque. jeep from the 60s and 70 71 used buick engines.
wow sounds boring
land rover didnt seem to think so.@@gageboysgarage6059
soo you stuck a 540 pound engine that cant even reach 300hp. but think a 435 pound 370 hp engine is boring. ok zoomer
Is there a way i can contact you? Maybe email or something? I have a few questions currently doing this swap right now.
message me on instagram, gageboysgarage cherry
Jeep really did something special when they combined the 4.0 to the AW4. It's almost like they wanted them to outlive humanity. Not good for business and perfectly illustrates why they killed off the XJ. Can't have these old shit boxes with hundreds of thousands of miles running around doing XJ stuff while the new models line up at the service drive. Now you know why they ditched the 4.0 for the "mini van" motor. 😂
exactly haha
A340 trans not R340 R is a manual.. simple mistake no one's perfect!
correct my bad, thanks for watching
cool info, please stop doing these massives zooms its wack ..
keep up the good work bruh
blasphemy!