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Unread 03-23-2013, 01:02 PM   #1
dakota123
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2004 TJ Wrangler 
 
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Looking at some 03 rubicons need help

So ima yj guy and dont know a bunch about long arm suspension or the coil suspension really at all. One has MTR 37 12.5 15 with a Savy Currie 4 inch lift And the other one has the rubicon
express 4.5 long arm kit with 35's. whats the difference?









And

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Unread 03-23-2013, 04:41 PM   #2
MayRoll
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Unlike your YJ, TJ's use coils to support the frame and set the ride height and uses control arms (links) to connect the axle to the frame. When the frame is lifted and the stock frame link mounts are used, this is referred to as a short arm. Savvy / Currie is as good as it gets for a short arm set up. A long arm refers to a longer control arm, so the frame link mounts are moved closer to the center of the frame. The fundamentals of a longer arm is to reduce the angle of the link between the axle and the frame. A short arm lift is limited to 4" as the increased angle of the arm can cause the link ends to bind when the axle is made to move throughout it's full range of motion. The increased angle of the arm will also transmit more harshness to the frame as opposed to the dampers.

Sounds like a long arm is better, right? Not necessarily. The longer the arm the more you have hanging under the rig to get hung up on. Also, RE has been plagued with bushing issues. Currie uses their propriety Johnny Joints (JJ's) which is arguably the finest misalignment joint available.

All else being equal, I'd go for the Savvy/Currie build. One word of caution, even if the Rubi's D44 have been upgraded with chromolly axle shafts, 37" rubber is pushing the limits on high traction surfaces.
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Unread 03-23-2013, 05:51 PM   #3
dakota123
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Thanks for that information. I am leaning towards the Savvy Currie one because i did read some poor reviews about what you mentioned with the RE. But then again can you just add long arms to the savvy Currie kit? Seems like it would be the best of both worlds if you did so. But then again not even sure if thats possible. And it does have the upgraded chromolly axle shafts in it. Are the chances of breaking something really that easy even with the upgraded shafts. Comming from a turdy 5 and a 30 i always thought the D44's were supposed to be real strong. The Jeep im lookin at its actually being sold on this forum. http://www.jeepforum.com/forum/f153/...miles-1468450/
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Unread 03-23-2013, 06:31 PM   #4
Filthy-Beast
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Some nice options on that jeep. If you're careful with the skinny pedal you'll most likely be fine. Couple of thinks missing for running 37s is upgraded brakes, even better rotors and pads would be a good thing. A lot guys with 37s who off road add ram assist steering or at least upgrade the steering the box. What type of off-roading do plan to do? If it was near me, and I as in the market, I'd take a hard look at it.
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[SIZE="1"][B]97 TJ:[/B] daughter 1 - 2.5L, Auto, 2" BB, 31" GY Duratrac
[B]98 TJ:[/B] Daugher 2 - 4.0L, 5spd, D44 rear
[B]06 LJ Rubicon:[/B] mine - Rokmen full up-armor, 8 adjustable CAs, front bumper, sliders, corners, Shrockworks rear bumper, 3" AEV/BDS lift, Currie HD stearing and Antirock, MT/r - k 35x12.5, SuperWinch, MC Overlines, York OBA
[B]13 JKU Rubicon:[/B] Wife's for now, Ace Rock rails & rear bumper tire carrier, Truck Lites, MC Game changer 3.5 lift, RR skids, PSC Brawler front bumper, Warn 9.5cti-s, 35" GY MTRs[/SIZE]
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Unread 03-23-2013, 07:34 PM   #5
dakota123
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Quote:
Originally Posted by Filthy-Beast View Post
Some nice options on that jeep. If you're careful with the skinny pedal you'll most likely be fine. Couple of thinks missing for running 37s is upgraded brakes, even better rotors and pads would be a good thing. A lot guys with 37s who off road add ram assist steering or at least upgrade the steering the box. What type of off-roading do plan to do? If it was near me, and I as in the market, I'd take a hard look at it.
That Ram steering how much does that run? And i do Moderate level stuff i guess nothing too ridiculous.
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Unread 03-23-2013, 10:26 PM   #6
MayRoll
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Quote:
Originally Posted by dakota123 View Post
...But then again can you just add long arms to the savvy Currie kit? Seems like it would be the best of both worlds if you did so. But then again not even sure if thats possible.
What makes Savvy / Currie kits so appealing is not it's suspension geometry, but it's quality of components. There are long arm kits that use JJ link ends, however the frame mounts need to be cut off and relocated. There are advantages of a longer link and thus reducing the angle as long as the correct geometry is used, I'm not convinced most off the shelf long arm kits offer the latter.

Quote:
Originally Posted by dakota123 View Post
And it does have the upgraded chromolly axle shafts in it. Are the chances of breaking something really that easy even with the upgraded shafts. Comming from a turdy 5 and a 30 i always thought the D44's were supposed to be real strong.
Strong enough to handle 35's locked, with a fair amount of abuse. 37's are a lot of weight and put a lot of torque on the shafts. It comes down to where you wheel and how you use the power.

That rigs looks nicely built, I didn't see if it had been regeared. The 42RLE needs at least a 5.89 gear to turn 37's IMO. The stock carrier and locker limits you to 5.13's.
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Unread 03-24-2013, 02:15 AM   #7
dakota123
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Quote:
Originally Posted by MayRoll View Post
What makes Savvy / Currie kits so appealing is not it's suspension geometry, but it's quality of components. There are long arm kits that use JJ link ends, however the frame mounts need to be cut off and relocated. There are advantages of a longer link and thus reducing the angle as long as the correct geometry is used, I'm not convinced most off the shelf long arm kits offer the latter.



Strong enough to handle 35's locked, with a fair amount of abuse. 37's are a lot of weight and put a lot of torque on the shafts. It comes down to where you wheel and how you use the power.

That rigs looks nicely built, I didn't see if it had been regeared. The 42RLE needs at least a 5.89 gear to turn 37's IMO. The stock carrier and locker limits you to 5.13's.
Thanks thats good to know! and I'm guessing he has not re-geared since he still has the stock carrier
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Unread 03-24-2013, 10:24 AM   #8
Filthy-Beast
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Hard to imagine that he spend the money on Currie and MetalCloak and did not re-gear, but he doesn't list it. So check that out. You could always sell the 37s and put 35's on it.
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[COLOR="red"][B]For Sale:[/B][/COLOR] [URL="http://www.jeepforum.com/forum/f129/jk-4dr-black-painted-hard-top-1000-a-1541186/"][COLOR="Blue"]2013 4dr JK Painted black Hard Top[/COLOR][/URL] [URL="http://www.jeepforum.com/forum/f127/jkur-18-59-springs-shocks-1557427/"][COLOR="Purple"]JKUR 18/59 springs and shocks[/COLOR][/URL]

[SIZE="1"][B]97 TJ:[/B] daughter 1 - 2.5L, Auto, 2" BB, 31" GY Duratrac
[B]98 TJ:[/B] Daugher 2 - 4.0L, 5spd, D44 rear
[B]06 LJ Rubicon:[/B] mine - Rokmen full up-armor, 8 adjustable CAs, front bumper, sliders, corners, Shrockworks rear bumper, 3" AEV/BDS lift, Currie HD stearing and Antirock, MT/r - k 35x12.5, SuperWinch, MC Overlines, York OBA
[B]13 JKU Rubicon:[/B] Wife's for now, Ace Rock rails & rear bumper tire carrier, Truck Lites, MC Game changer 3.5 lift, RR skids, PSC Brawler front bumper, Warn 9.5cti-s, 35" GY MTRs[/SIZE]
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Unread 03-24-2013, 04:36 PM   #9
dakota123
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Quote:
Originally Posted by Filthy-Beast
Hard to imagine that he spend the money on Currie and MetalCloak and did not re-gear, but he doesn't list it. So check that out. You could always sell the 37s and put 35's on it.
Yeah that is true. That is what i will probably end up doing
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