Pre purchase questions 2006 Rubi Unlimited - JeepForum.com
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post #1 of 27 Old 08-08-2017, 05:32 PM Thread Starter
MoGas
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Pre purchase questions 2006 Rubi Unlimited

My Background:
I am a CJ and FSJ guy all my life. I have owned from a '43 MB to a 1987 Grand Wagoneer. I know very little about new school Wranglers. My current Jeep is a '79 CJ7 that I have had for 20 some years. 304 V8, T-18, Dana 44 rear, etc.

My situation:

I am buying a 2006 TJ Unlimited Rubicon. I have found a few that meet my criteria, but I have a few questions. I already know that the 4.0 is a great engine with a pretty solid history of dependability and easy to find parts for.

My questions are:

Is it called out in the VIN that it is truly a Rubicon?

I know to look for the D44s with lockers, the 4:1 transfer case, the Rubicon specific wheels and the little rocker protectors, but short of having the original window sticker, is there a way to be sure?

Is the 6 speed any good?

Is the 42RLE automatic any good?

Are there any areas prone to cracking or rust that I need to look at closely?

Thank you,
Dave

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post #2 of 27 Old 08-08-2017, 06:27 PM
Rubi503
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look up Jeep VIN decoder. First should be 1J4FA64S56.xxxxxx The A means Wrangler, 6=Rubicon. Second 6=Year
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post #3 of 27 Old 08-08-2017, 06:40 PM
pagrey
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The 6 speed and the 42RLE are great. It is more important what you want to drive. If you want a stick you will never be happy with a 42RLE. This is really important, you can't swap.

If it has a 4:1 transfer case and the axles it is a Rubicon. If someone faked it it doesn't matter. You are paying the premium for the axles and the transfer case, not the VIN number.

Avoid the Rubicon unless you plan on leaving it 100% stock. The D44 front axle costs you ground clearance and is no stronger than the D30. The lockers are know to be weak. You are better off starting with a regular LJ unless you "need" the 4:1 transfer case. With the money you save you can re-gear and get real lockers. The stickers are cheap and the rocker guards are practically free on craigslist.

Honestly I'd look for an 04 LJ, the engine and electronics are the most reliable and easiest to work on if you can live with an automatic (I am obviously biased).

The frame rusts easily, pay attention to the areas near the control arm mounts. I would never buy anything that had rust that flakes but I'm one of those spoiled southwest buyers.
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post #4 of 27 Old 08-08-2017, 07:12 PM
stwilson74
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I would disagree. The 6 speed is adequate, not great. The synchros are not great and its common for them to spit the shifter out of first and third gears. That being said I bought my 6 speed 2005 Rubicon LJ new and happily put about 210,000 miles on it daily driving it up until about 2 weeks ago. I will also say I am happy I got the Rubicon, the 6 speed and 4.11 gearing was good enough for street driving even with 35's until I could regear and with the 4 to 1 transfer case it was fine off road. I will say if you have the cash to do a build right out of the gate a Rubicon will add needless cost, but if you want to go wheeling day one and slowly build up then its worth it. Just start saving to replace the rear locker, they do fail.

If not going for a Rubicon I'll agree with doing a 2004 instead, you'll avoid the OPDA issues and will not burn up cats as quickly. Good luck with your hunt!

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post #5 of 27 Old 08-08-2017, 07:13 PM
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If you want to know about the original info on the jeep, here's the link to the build sheet. Just enter the vin. This is from the stickies in the TJ section of the forum which will have a lot of other useful info, too.

https://jeep.custhelp.com/app/jeep/e...WGxOMmc2T2w%3D

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post #6 of 27 Old 08-08-2017, 08:50 PM
TheBoogieman
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The 42rle is adequate with stock size tires. The steep OD sucks with anything larger. 130,000 miles and my Rubi's rear locker still works fine.

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TheBoogieman is a jerk.
2003' Rubicon/Zone 4.25" combo lift with Rancho RS5000X shocks/ Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #7 of 27 Old 08-08-2017, 08:56 PM
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Quote:
Originally Posted by pagrey View Post
The 6 speed and the 42RLE are great.
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Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
2003' Rubicon/Zone 4.25" combo lift with Rancho RS5000X shocks/ Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #8 of 27 Old 08-08-2017, 10:38 PM
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Quote:
Originally Posted by TheBoogieman View Post
The 42rle is adequate with stock size tires. The steep OD sucks with anything larger. 130,000 miles and my Rubi's rear locker still works fine.
Doesn't have to suck with larger tires, but it does require regearing. 42RLE would never be anyone's first choice of auto, but with the right gearing and supplemental cooling it can work very nicely. It did win the first few years of the Everyman Challenge.
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post #9 of 27 Old 08-09-2017, 11:51 PM
LRod
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I have an 06 Rubicon that had a bad OPDA that ate up my cam gear, pull the OPDA and check the drive gear or you'll be doing it soon after. I think the 42RLE probably good with stock tires but once you bump up in size you may not like the shifting.
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post #10 of 27 Old 08-10-2017, 06:16 AM
JEK3
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Quote:
Originally Posted by TheBoogieman View Post
The 42rle is adequate with stock size tires. The steep OD sucks with anything larger.
Can you turn off the OD?
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post #11 of 27 Old 08-10-2017, 06:23 AM
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Can you turn off the OD?
Yes
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post #12 of 27 Old 08-10-2017, 06:53 AM
Ironhead
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any reason its only 06? personally i'd look for an 04
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post #13 of 27 Old 08-10-2017, 01:17 PM Thread Starter
MoGas
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I was just figuring that the newest would likely have the least miles. Were there Rubicon Unlimiteds in 04? What would be the advantage of an 04?
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post #14 of 27 Old 08-10-2017, 01:40 PM
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04 LJ's are auto only but they did offer a rubicon model
05-06 have the opda issue and a breather valve on the fuel fill tube that gets stuck and shoots gas out when the tank is full
06 autos have a goofy glitch in the TCU that tells the trans to hard shift from 1st to 2nd until the trans is warmed up

04 is generally seen as one of the most reliable years


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post #15 of 27 Old 08-10-2017, 01:42 PM
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Quote:
Originally Posted by MoGas View Post
I was just figuring that the newest would likely have the least miles. Were there Rubicon Unlimiteds in 04? What would be the advantage of an 04?
I think it has been said here. The 05/06 had OPDA issues. Which CAN cause engine failure if not looked after.

4 speed Auto only in the 04' (LJ only- TJs have NV3550), where the 05/06 have the 6speed NSG370 which some say have issues with synchros.

2006 LJR...the madness begins again
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