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Old 10-10-2018, 10:08 PM
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I installed the Mopar 2 inch lift, Rancho Geo Brackets and yeti track bar along with 1.5 inch spidertraxx about 3 months or so ago.drivabilty is off the charts good, handling and steering is better than stock and the look is on point. Had the alignment checked again at the dealer again today and the camber was in spec, whatever that means, the toe was out
.24 which I will have corrected when I get new tires since the tech didn't think it would need it. My question is this, the caster was 5.1. absent any real problems, is that number ok? I am using the top hole in the Geo brackets.

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Old 10-10-2018, 10:20 PM   #2
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That’s fine

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Old 10-10-2018, 10:41 PM   #3
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As said b4. You are good. If you were not you would be complaining about flighty steering and weak return to center. Toe out is a hair high but a little toe out is often used to prevent shimmy during acceleration with larger tires.
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Old 10-10-2018, 11:21 PM
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As said b4. You are good. If you were not you would be complaining about flighty steering and weak return to center. Toe out is a hair high but a little toe out is often used to prevent shimmy during acceleration with larger tires.
Yeah, the tech and service manager both said they wouldn't bother with the toe until I got new tires and since it was a stealership and knowing how they like to upsell everything I thought they were being genuine about that.

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Old 10-11-2018, 12:21 AM   #5
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I also have the mopar 2 inch lift.

My caster is 5.6 with adjustable LCAs, it drives pretty good but I feel like it could be better. I rebuilt the ENTIRE stearing system and suspension, minus upper control arms.

Thinking about adjustable upper CAs and doing some tweaking.
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Old 10-11-2018, 03:17 PM   #6
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I also have the mopar 2 inch lift.

My caster is 5.6 with adjustable LCAs, it drives pretty good but I feel like it could be better. I rebuilt the ENTIRE stearing system and suspension, minus upper control arms.

Thinking about adjustable upper CAs and doing some tweaking.
Hmm that caster might be a hair high, what lift and tires?
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Old 10-11-2018, 03:50 PM
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Mopar 2 inch lift, rancho Geo brackets, yeti track bar and factory Rubicon/willys wheels and tires.
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Old 10-11-2018, 04:10 PM   #8
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Quote:
Originally Posted by 3rdcoast jk View Post
I also have the mopar 2 inch lift.

My caster is 5.6 with adjustable LCAs, it drives pretty good but I feel like it could be better. I rebuilt the ENTIRE stearing system and suspension, minus upper control arms.

Thinking about adjustable upper CAs and doing some tweaking.
Unless you're at the shortest setting, wouldn't shortening your adjustable LCA's accomplish a lower caster #?
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Old 10-11-2018, 04:22 PM
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Don't have adjustable lcas. I have Geo brackets and they are in the top hole as recommended.

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Old 10-12-2018, 04:35 AM   #10
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Quote:
Originally Posted by 3rdcoast jk View Post
I also have the mopar 2 inch lift.

My caster is 5.6 with adjustable LCAs, it drives pretty good but I feel like it could be better. I rebuilt the ENTIRE stearing system and suspension, minus upper control arms.

Thinking about adjustable upper CAs and doing some tweaking.
Hmm that caster might be a hair high, what lift and tires?
Mopar 2" on half worn 265 70 18 (32.5?) The tires are falken rocky mountain ATS.

I will be getting 275 70 18 or slightly bigger in the near future.

Any input would be helpful.

I thought about trying the geo brackets with stock arms just to compare. $100 isn't to bad of an experiment.
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Old 10-12-2018, 04:50 AM   #11
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Quote:
Originally Posted by 3rdcoast jk View Post
I also have the mopar 2 inch lift.

My caster is 5.6 with adjustable LCAs, it drives pretty good but I feel like it could be better. I rebuilt the ENTIRE stearing system and suspension, minus upper control arms.

Thinking about adjustable upper CAs and doing some tweaking.
Unless you're at the shortest setting, wouldn't shortening your adjustable LCA's accomplish a lower caster #?
That's a good question, I'm not sure which way moves the number lower or higher. I can go shorter, but it didn't drive worth a damn when I shortened them. I have changed the stearing gear since then and that helped alot. Maybe I can go shorter now that the gearbox doesn't have slop in it.

The LCA's are set at 23" if I remember right.

I don't think I can go longer either without adjustable uppers to keep the pinion angle from going negative. Unfortunately the alignment shop didn't give me a pinion angle so I don't know for sure where it's at. Looks pretty flat though.
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Old 10-12-2018, 08:35 AM   #12
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That's a good question, I'm not sure which way moves the number lower or higher. I can go shorter, but it didn't drive worth a damn when I shortened them. I have changed the stearing gear since then and that helped alot. Maybe I can go shorter now that the gearbox doesn't have slop in it.

The LCA's are set at 23" if I remember right.

I don't think I can go longer either without adjustable uppers to keep the pinion angle from going negative. Unfortunately the alignment shop didn't give me a pinion angle so I don't know for sure where it's at. Looks pretty flat though.
Longer LCA's increases Caster #, so if you've been shorter and drive suffered, I'd leave length as is.
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Old 10-12-2018, 02:11 PM   #13
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Mopar 2" on half worn 265 70 18 (32.5?) The tires are falken rocky mountain ATS.

I will be getting 275 70 18 or slightly bigger in the near future.

Any input would be helpful.

I thought about trying the geo brackets with stock arms just to compare. $100 isn't to bad of an experiment.
Well with only 2" of lift then geo brackets with stock arms should ride almost exactly like stock. Geo brackets wont change your caster much from the way it is now with LCA's but it will allow the suspension to work more as intended when you hit a bump. The ride will be just a hair smoother but at only 2" you may not even notice much difference.

As for tires I would try to find a D load rating vs an E as the sidewalls will have a little more flex to and allow the tires to soak up bumps. A good side effect of a flexible sidewall is that it will also be less inclined to follow ruts.
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Old 10-12-2018, 02:15 PM   #14
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remember a Mopar 2" is more like a 3-3.25" lift.
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Old 10-13-2018, 04:08 AM   #15
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Yeah these tires definitely have a stiff sidewall. Think I have a bit to much air in them right now too.

Probably going to get new tires at the end of this month.
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Old 10-13-2018, 11:54 AM   #16
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My opinions -
Positive Caster between 4 and 6 degrees is optimal from my experience. Use caution when setting positive caster as Pinion angle should be within a few degrees of the angle on the transfer case output shaft or you will end up with driveline vibrations that will cost you a lot of money in the long run.
Make sure you do frequent tire rotations when running more than +4° Caster also as you will start to cup the tires.
Steering effort with higher positive caster is also increased, but generally tolerated well by the power steering system.
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Old 10-13-2018, 11:59 AM   #17
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