Has anyone modified a 2wd jk to a 4wd ? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 17 Old 01-08-2012, 05:56 PM Thread Starter
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Has anyone modified a 2wd jk to a 4wd ?

I know weird question huh, but I'm not kidding...!

I have my eyes on a 2wd Jk and wondering if anyone has experience with modifying one?

It looks like if I find a front axle, tcase, crossmember, and a driveline, and switch out the tranny from 2wd to a 4wd. That this would be pretty much a bolt together fix?
Am I correct or are the 2wd's missing more than that...?

It has a solid tube w/ knuckles for the the front axle ordered from the factory and all the aftermarket parts on it are normal ordered parts for a Jk.

Let me know if you can lend an opinion and some help..
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post #2 of 17 Old 01-08-2012, 06:15 PM
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There is a thread on here somewhere on it-search function is ur friend.

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post #3 of 17 Old 01-08-2012, 06:17 PM
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This has been done quite a bit and is actually a cost effective way if you plan to do a significant build up with custom axles, Atlas, etc. The trans is fine, you just need the adapter between the trans and t-case, the thing you toss when installing a Rubicrawler.
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post #4 of 17 Old 01-08-2012, 06:17 PM
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Check out block's build i believe he did the the conversion. also River raider did it for the Raider ST. so you could probably call Kenny if you run in to issues.
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post #5 of 17 Old 01-08-2012, 10:38 PM
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https://www.jkowners.com/forum/showthread.php?t=7032

This is the rebel link for 2wd to 4wd. I'm also doing a 4wd drive conversion. I picked up a rubi axle that I'm building up and a rubi t-case as well. Now I'm hunting down the parts to put it all together. This direction is allowing me to save a lot of money for other things versus buying a rubi right from the start and paying a pretty penny.

07 JKU Rescue Green with 3.5" RK Mid-Arm Flex w/ Bilstein 5100s, 5.13's, Eaton E-Locker, 35" MT Baja ATZ, 17" DC Torque wheels, Monstalined tub, Home-made front bumper with Smittybilt XRC-8 winch, Wild Boar rack w/ IPF 968 lights, K&N Intake, Gibson Exhaust.
Future Mods: 2wd-4wd conversion = completed!
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post #6 of 17 Old 01-08-2012, 11:14 PM
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It sounds (well from what I have read) like its a cost effective way to go. And look at it this way, you are saving a sad 2WD Jeep and giving it something to live for

08 2Door Red Rubicon. Rock Krawler 5.5 Longarm Coilover, Polly rear Coilovers. AEV hood & wheels, 37"KM2s, JE Reel 1350 shafts, 5.38 Yukon gears, Superior axles, Shrockworks stubby, Fab Fours rear, sPod, Rebel Offroad brakes, Warn winch and lots more.

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post #7 of 17 Old 01-09-2012, 05:29 AM
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I'm currently in the process of converting an 08 2wd to a 4wd. (HP D60/FF 14B w/5.38's, 231/205....) The only true issue with 2wd's (with the manual tranny) is the output. I pulled all of the crap from the back of tranny and come to find out the output shaft is 30 spline. I called and contacted a shit ton of company's to see if they could make a spud shaft but nobody is willing because it's "not cost effective". If you're looking to convert and it's a 6 speed I'm pretty sure that a 12 bolt yoke (30 spline) would fit on it so that you could run a divorced t-case set-up. Other than that you'd have to replace the output shaft or swap out the tranny.

Last edited by Jeepmods; 01-09-2012 at 05:41 AM.
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post #8 of 17 Old 01-09-2012, 06:05 AM
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You have to replace the output shaft no matter what , but you get it from the dealer the output shaft on the 2wd is longer then the 4wd
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post #9 of 17 Old 01-09-2012, 06:28 AM
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Best mod ever..... two to four conversion.

Take your two wheel drive, replace the front and rear axles with 60s +locker of your choice, add Atlas tcase, and you'll be near the price of a Rubicon with a WAY better platform to start with.
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post #10 of 17 Old 01-09-2012, 07:02 AM
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Quote:
Originally Posted by Jeepmods View Post
I'm currently in the process of converting an 08 2wd to a 4wd. (HP D60/FF 14B w/5.38's, 231/205....) The only true issue with 2wd's (with the manual tranny) is the output. I pulled all of the crap from the back of tranny and come to find out the output shaft is 30 spline. I called and contacted a shit ton of company's to see if they could make a spud shaft but nobody is willing because it's "not cost effective". If you're looking to convert and it's a 6 speed I'm pretty sure that a 12 bolt yoke (30 spline) would fit on it so that you could run a divorced t-case set-up. Other than that you'd have to replace the output shaft or swap out the tranny.
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You have to replace the output shaft no matter what , but you get it from the dealer the output shaft on the 2wd is longer than the 4wd
Yeah this, all fairly inexpensive 4wd replacement parts. Pretty sure there's a 6-speed swap thread with part no's somewhere here too.

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post #11 of 17 Old 01-09-2012, 09:08 AM
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Quote:
Originally Posted by jaker View Post
You have to replace the output shaft no matter what , but you get it from the dealer the output shaft on the 2wd is longer then the 4wd
There's a thread that shows the conversion and parts required to convert the Auto 2wd to a 4wd. On the Manual 2wd the output is recessed a little. I think I posted the measurements on this forum... Hmmmm? Can't remember.
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post #12 of 17 Old 01-09-2012, 09:22 AM
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If I had a Flux Capacitor and could actually get my rig to 88 miles an hour, I would go back to 2008 and buy a loaded 2wd to build instead of the Rubi.

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post #13 of 17 Old 01-09-2012, 10:59 AM
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88 MPH without DW.... Impossible!~
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post #14 of 17 Old 01-09-2012, 11:13 AM
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I personally did the conversion in my garage at home and saved a lot of cash!! I knew going into it if I bought it 4WD I would be getting rid of so many stock parts it wouldn't be worth it so I bought 2WD and installed all new parts, front Pro Rock 44, rear Rock Jock 60, and Atlas 2. It was a very simple conversion but you'll need to know a few things before starting it.

Keep in mind the computer knows NOTHING about 4WD so you will not get dash lights or ESP/ABS control when in 4WD. You can get the dash lights working but wiring them in directly but I haven't found a way to get the ESP/ABS to switch off in 4-Low. I'm sure someone with more knowledge than me has/could find a way but I haven't. Instead I wired in a switch to kill ESP/ABS when I want to on the trails.

You only need a handful of parts to make it happen. You'l need the transmission tail housing (called 4WD Adapter), the tail housing mount for your crossmember, the internal 4WD center console bezel (unless you want to cut the shifter hole on your own), and of course the transfer case and front axle of your choice and you'll be all set.

If you're planning to major upgrades to an existing 4WD and you don't mind tinkering with getting the dash lights and ESP/ABS control then it's really a nice cost effective way to build one hell of a JK!!
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post #15 of 17 Old 01-09-2012, 02:55 PM
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Something I remember from some time ago, many of the 2wd JKs were sold in resort areas as daily rentals, so if you prowl auction sites, or have your dealer do so for you, so may be able to find one pretty cheap. Word is out on these as builder-rigs, so prices may have started to increase a bit on them.
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post #16 of 17 Old 01-13-2012, 10:13 PM
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Quote:
Originally Posted by SoK66 View Post
Something I remember from some time ago, many of the 2wd JKs were sold in resort areas as daily rentals, so if you prowl auction sites, or have your dealer do so for you, so may be able to find one pretty cheap. Word is out on these as builder-rigs, so prices may have started to increase a bit on them.
Yup and the intermediate shaft, aka output shaft, that goes from tranny to tcase is on back order.

If anyone know where to get one please let me know.

Edit: found one!!! time to get busy.

07 JKU Rescue Green with 3.5" RK Mid-Arm Flex w/ Bilstein 5100s, 5.13's, Eaton E-Locker, 35" MT Baja ATZ, 17" DC Torque wheels, Monstalined tub, Home-made front bumper with Smittybilt XRC-8 winch, Wild Boar rack w/ IPF 968 lights, K&N Intake, Gibson Exhaust.
Future Mods: 2wd-4wd conversion = completed!

Last edited by jeepRcreepR; 02-04-2012 at 03:36 PM.
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post #17 of 17 Old 01-14-2012, 12:01 PM
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I didn't even know a jeep came in 2 wheel drive.

BTM FDR
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