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Old February 12th, 2006, 01:34 PM   #1
C.K.
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Default TJ/ LJ wheelbase ??

I want to stretch the wheelbase of my TJ. I thought I could use the RE control arms from an unlimited. Any idea what the difference in control arm length is.
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Old February 12th, 2006, 02:23 PM   #2
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10" is the controll arm difference
TJ = 93.4" Wheelbase
LJ = 103.4" Wheelbase
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Old February 12th, 2006, 03:56 PM   #3
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So...you're saying that the control arms are mounted to the frame at exactly the same distance on the TJ and LJ. I find this to be unlikely. Just my $.02
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Old February 12th, 2006, 04:59 PM   #4
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Quote:
Originally Posted by fr3db3ar
So...you're saying that the control arms are mounted to the frame at exactly the same distance on the TJ and LJ. I find this to be unlikely. Just my $.02

You are probably right. If the LJ arms are 10" longer that might be a little longer than I want.

I guess I will need to find someone with an unlimited that has a RE LA kit on it and measure the rear arms.
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Old February 12th, 2006, 05:51 PM   #5
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Quote:
Originally Posted by fr3db3ar
So...you're saying that the control arms are mounted to the frame at exactly the same distance on the TJ and LJ. I find this to be unlikely. Just my $.02
When you use a Rubicon Express long arm kit the only difference is the rear control arm length. They both use the same skid plate that the arms are attached to. Unlike a Clayton long arm kit, Clayton mounts there arm's on the frame with new brackets.RE4030 and RE4040 are for a TJ and RE4050 and RE4060 are of a LJ. They don't make a different crossmember (RE4200) for a LJ.

If you talking about a short arm kit the front and rear lowers and uppers on both a TJ and LJ are they same. On the LJ the mounts for the control arms are 10" farther back on the frame rails.

Last edited by Rocky; February 12th, 2006 at 06:05 PM.
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Old February 12th, 2006, 09:45 PM   #6
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I would like to throw in my $.02.
I used to work at Jeep for a sub-contractor. I personally didn't see much difference in the front at all, but the rear is another story. I can't say for sure that the rears are definately longer, mainly because chrysler stretched the frame between the axles rather than mess with an already proven suspension.
now speaking after market suspension is completely different story, I would definately get my facts straight before doing any major retuning.

just my $.02
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Old February 12th, 2006, 09:49 PM   #7
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Quote:
Originally Posted by fr3db3ar
So...you're saying that the control arms are mounted to the frame at exactly the same distance on the TJ and LJ. I find this to be unlikely. Just my $.02
RE uses the same skid plate for TJ and TJ Unlimited.. yes the longarms are that much longer.. :/
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Old February 13th, 2006, 07:30 AM   #8
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Quote:
Originally Posted by TJrockdogg
I would like to throw in my $.02.
I used to work at Jeep for a sub-contractor. I personally didn't see much difference in the front at all, but the rear is another story. I can't say for sure that the rears are definately longer, mainly because chrysler stretched the frame between the axles rather than mess with an already proven suspension.
now speaking after market suspension is completely different story, I would definately get my facts straight before doing any major retuning.

just my $.02

Thanks for the input. I am just going to call RE.
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Old February 13th, 2006, 07:38 PM   #9
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I believe that Blue Touch fab is comming out with a kit to stretch a TJ's wheelbase. From what ive heard it involves a new 16 gal tank and a few other pieces, but it allows you to move the rear axle back 6 inches. You could also got the extreme route and remove the gas tank, install a fuel cell inside, move axle back, cut off upper spring mounts and reposition them for proper spring angle...
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Old February 13th, 2006, 07:50 PM   #10
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Quote:
Originally Posted by Skooter_Built
I believe that Blue Touch fab is comming out with a kit to stretch a TJ's wheelbase. From what ive heard it involves a new 16 gal tank and a few other pieces, but it allows you to move the rear axle back 6 inches. You could also got the extreme route and remove the gas tank, install a fuel cell inside, move axle back, cut off upper spring mounts and reposition them for proper spring angle...
BTF has 2 versions? 1 sits under the Jeep, in the stock location, but moved back. The other version, will bolt in behind the seat, using factory bolt holes in the tub. Nth degree has one that is going to come out round Easter Jeep Safari. It moves the rear axle back 5" and uses a new 16 gal. fuel tank that uses stock TJ parts. Clayton also makes a stretch kit ,but no fuel cell.

Last edited by Rocky; February 13th, 2006 at 07:57 PM.
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Old February 13th, 2006, 08:41 PM   #11
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Quote:
Originally Posted by Skooter_Built
I believe that Blue Touch fab is comming out with a kit to stretch a TJ's wheelbase. From what ive heard it involves a new 16 gal tank and a few other pieces, but it allows you to move the rear axle back 6 inches. You could also got the extreme route and remove the gas tank, install a fuel cell inside, move axle back, cut off upper spring mounts and reposition them for proper spring angle...


I already have the fuel cell for behind the seat. As for the spring perches, they will be cut off to make room for coilovers. Just need the arms. I want to use Re because i just got the RE tri link set up installed. I talked to Re today. They said the arms are about 10" longer, as Rocky said. The problem is the dont have a tri link set up for the LJs yet.
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