AEV Geometry Brackets
JK Super Freak
Joined: Oct 2009
Posts: 1,381
Likes: 1
From: East Bridgewater, MA
Well, yes for the most part but too much caster can cause driveshaft vibrations due to bad pinion angles. So yes its a part that rotates but the cause is the caster/pinion angles.
When you lift a jeep, finding the good caster angle to avoid flighty steering and driveline vibrations is tough. But if he's only lifted 2.5", and hasn't gone crazy with a 6 to 8 degree caster (which the brackets wont do anyway) then it is unlikely his issue.
When you lift a jeep, finding the good caster angle to avoid flighty steering and driveline vibrations is tough. But if he's only lifted 2.5", and hasn't gone crazy with a 6 to 8 degree caster (which the brackets wont do anyway) then it is unlikely his issue.
JK Super Freak
Joined: Jun 2011
Posts: 1,715
Likes: 11
From: Olympia, WA
Well, yes for the most part but too much caster can cause driveshaft vibrations due to bad pinion angles. So yes its a part that rotates but the cause is the caster/pinion angles.
When you lift a jeep, finding the good caster angle to avoid flighty steering and driveline vibrations is tough. But if he's only lifted 2.5", and hasn't gone crazy with a 6 to 8 degree caster (which the brackets wont do anyway) then it is unlikely his issue.
When you lift a jeep, finding the good caster angle to avoid flighty steering and driveline vibrations is tough. But if he's only lifted 2.5", and hasn't gone crazy with a 6 to 8 degree caster (which the brackets wont do anyway) then it is unlikely his issue.
Thread Starter
JK Newbie
Joined: Mar 2011
Posts: 23
Likes: 0
From: Lawrence Kansas
3" bds lift with a 1.75" spacer up front. Tires are probably due for a rebalance anyway. Thanks for the info. He did tighten everything up on the lift. I will fix that first and go from there. Thanks again.
JK Junkie
Joined: Jun 2012
Posts: 3,336
Likes: 0
From: Midwest
Originally Posted by mpkelley20
Set them for whatever size lift you have. Don;t use the 3.5 if you only have a 2.5" lift. The entire purpose of these brackets is to bring your geometry back in line to stock so they are set based on whatever height lift you have installed. If you have a 2.5: but set it to 3.5", you will throwing off your caster even the opposite way from where it is now.
For instance if a person has 2.5 and feels flighty goto the 3.5 setting. Same for 3.5 goto the 4.5 setting.
As for "hardcore " wheeling and the geometery brackets are a " bandaid" I also disagree. I feel that a stock JK, especially a Rubicon with a shortarm is more capable than most people know it.
Ask anyone that has owned a Stock TJ vs JK.
JK Super Freak
Joined: Jun 2011
Posts: 1,715
Likes: 11
From: Olympia, WA
I disagree with what you are saying with the hole placement on the brackets. I say this because with talking to one if the engineers at AEV he stated that if a person isn't running any weight on the front end and the jeep feels flighty he suggests to goto the next hole for more castor.
For instance if a person has 2.5 and feels flighty goto the 3.5 setting. Same for 3.5 goto the 4.5 setting.
As for "hardcore " wheeling and the geometery brackets are a " bandaid" I also disagree. I feel that a stock JK, especially a Rubicon with a shortarm is more capable than most people know it.
Ask anyone that has owned a Stock TJ vs JK.
For instance if a person has 2.5 and feels flighty goto the 3.5 setting. Same for 3.5 goto the 4.5 setting.
As for "hardcore " wheeling and the geometery brackets are a " bandaid" I also disagree. I feel that a stock JK, especially a Rubicon with a shortarm is more capable than most people know it.
Ask anyone that has owned a Stock TJ vs JK.
I don't think the brackets are a band-aid either, but every mod has one limitation or another. With the brackets hanging down, some folks here have said the control arms and brackets get bent and beaten on the rocks. For them, HD adjustable arms probably work better. Either way, I agree the JK can handle some amazing terrain.
JK Junkie
Joined: Jun 2012
Posts: 3,336
Likes: 0
From: Midwest
Originally Posted by Freewill
The AEV installation manual says the same thing. The actual measured height of the lift determines which hole to use when there is any doubt. I'm sure a stock JK soft top without AC would get well over 3" with the 2.5" kit.
I don't think the brackets are a band-aid either, but every mod has one limitation or another. With the brackets hanging down, some folks here have said the control arms and brackets get bent and beaten on the rocks. For them, HD adjustable arms probably work better. Either way, I agree the JK can handle some amazing terrain.
Thread Starter
JK Newbie
Joined: Mar 2011
Posts: 23
Likes: 0
From: Lawrence Kansas
Ok, re-tightened the control arms with the jeep on the ground. Not sure they moved but I think they did. Rotated tires and adjusted air pressure where needed. I think it is better than before but the tires will be due for getting balanced soon. It has been 7500 miles since last balance was performed. I've been doing them every 5k when I change my oil. (I use Mobil one full synthetic). Thanks for all the info and my wallet thanks you as well. See you next time.