Geometry correction brackets for 2" lift - recommended

[AnnDee4444]

How does the changed geometry deal with hard braking? I haven't mapped the JLs mounting points, but I suspect that the "corrected" geometry would make the front suspension dive more than the OEM mounting points.

https://www.crawlpedia.com/4_link_suspension.htm

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[DanW]

How does the changed geometry deal with hard braking? I haven't mapped the JLs mounting points, but I suspect that the "corrected" geometry would make the front suspension dive more than the OEM mounting points.

https://www.crawlpedia.com/4_link_suspension.htm

AEV claims it improves nose dive under hard brakng, rather than worsening it.

 

[vinniechin]

I think because the control arm is more parallel to the ground, vs being at an angle. But I failed geometry in high school and life.

 

[AnnDee4444]

AEV claims it improves nose dive under hard brakng, rather than worsening it.

I see that on their website... but it still doesn't make sense to me. "Reduced brake-dive"

The correction bracket lowers the frame-side LCA mounting point, which would always move the instant center rearwards regardless of where the center of gravity is located. When this happens you are lowering the anti-dive percentage, or in other words increasing the dive (stupid double negatives). This is exactly the opposite of AEV's claim.

Also the situation is unique for all wheelbases, which AEV doesn't address at all.

 

[McCoys]

I was looking at between getting the AEV or the ARB with HD springs and I opted for the ARB. Simply because ARB supplies adjustable control arms and trackbars. In my mind, less moving pieces = less maintenance, more longevity. Costs a pretty penny more but definitely worth it.

 

[Kurt0]

I see that on their website... but it still doesn't make sense to me. "Reduced brake-dive"

The correction bracket lowers the frame-side LCA mounting point, which would always move the instant center rearwards regardless of where the center of gravity is located. When this happens you are lowering the anti-dive percentage, or in other words increasing the dive (stupid double negatives). This is exactly the opposite of AEV's claim.

Also the situation is unique for all wheelbases, which AEV doesn't address at all.

Where did you get that drawing and what is their engineering experience?

anyone asserting that lowering the frame side LCA mount increases dive is completely off their rocker.

 

[AnnDee4444]

Where did you get that drawing and what is their engineering experience?

anyone asserting that lowering the frame side LCA mount increases dive is completely off their rocker.

Looks like it came from here https://www.crawlpedia.com/4_link_suspension.htm

 

[Kurt0]

Looks like it came from here https://www.crawlpedia.com/4_link_suspension.htm

ill read it later to see what it says. Thanks for finding it

 

[Kurt0]

Combination of the AEV geo brackets with the lca’s is great for my use. Truck is completely stable at any speed, handles and drives great, and has no issues with hard braking/emergency lane change type maneuvers even when laden down; even lifted on 37’s.

for record; on 3” of lift, the center hole results in sub 5° of caster; and the highest setting gives just over 5°. So it’s returning geometry to factory spec; not “”optimized””. I use a Clayton Overland+ control arm kit to get caster north of 6°. The control arms sit really nice and near level; and the truck handles better and less brake dive than stock.

Exactly what i was looking for.

 

[AnnDee4444]

for record; on 3” of lift, the center hole results in sub 5° of caster; and the highest setting gives just over 5°. So it’s returning geometry to factory spec; not “”optimized””.

This was with factory arms... correct?

 

[Kurt0]

This was with factory arms... correct?

correct. ACA’s got me north of 6°; brackets keep them close to level. Its working great.

 

[DanW]

I've been running the Dynatrac 2" lift on my '19 4-door Sahara for a while. The ride, the dampening, and the cornering have been fine, but the steering did not feel right. There was too much play around in the dead zone and too much adjustment needed when driving on a highway.

I started with adding control arms from the Mopar lift kit, which are about 1/4" longer than stock, to improve the caster. Then I replaced the stock steering stabilizer (which has been replaced by the dealer twice) with Teraflex adjustable steering stabilizer. This helped a bit, but the steering was still too loose for my taste.

At the Chicago Auto show I spoke with AEV folks (who were exhibiting some sweet rides, BTW), who told me that they always install geometry correction brackets, even on their smallest 2" lifts.

After this conversation. I purchased and installed Rancho geometry correction brackets, and finally the steering is spot on! There is nice heaviness around the center, the Jeep is much more enjoyable to drive on the highway, and the ride on bumpy surfaces has improved as well.

Hope this will help someone's suspension journey.

How are you liking this setup after a year? Also, did it move your axle forward at all?

 

[AZ Hella]

I also have the Dynatrac kit and love it. I’m leaning towards the Teraflex brackets. They offer reinforcement kit to beef them up.

 

[The Dude :)]

I started with the Mopar lift and the ride was slightly rough. On acceleration the nose would lift and braking the nose would dive some. Then i installed the 35's and it drove like crap & around 28K the Death Wobble started. I utilized the longer lower arms in the kit, replaced the Draglink and tie rod with Rock Jock HD components and Rancho Geo Brackets. What was I ever waiting for???? It was the Rancho Geo Brackets that kicked butt. No more nose lift or dive, ride quality difference was different as night and day and the steering ....one thumb! Don't expect the Mopar lift to be all you need because it's not. Geo Brackets Rock!

 

[Kum4224]

I started with the Mopar lift and the ride was slightly rough. On acceleration the nose would lift and braking the nose would dive some. Then i installed the 35's and it drove like crap & around 28K the Death Wobble started. I utilized the longer lower arms in the kit, replaced the Draglink and tie rod with Rock Jock HD components and Rancho Geo Brackets. What was I ever waiting for???? It was the Rancho Geo Brackets that kicked butt. No more nose lift or dive, ride quality difference was different as night and day and the steering ....one thumb! Don't expect the Mopar lift to be all you need because it's not. Geo Brackets Rock!

Did you use the brackets with factory arms or the 1/4" extended arms? I tried it with the extended arms but my caster got pushed too far to 7 degrees and steering is pretty heavy. Now going to try factory arms but maybe I should mount the uppers to the 2nd hole, not the first? What did you do in the end?

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