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Fine tuning front end geometry

Old 07-22-2013, 09:18 PM
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Default Fine tuning front end geometry

Ok so here's the deal. Jeep is a DD. Got 3.5"RE super ride kit. Full leafs. Really sits close to 4.5". Ive got factory upper arms and the fixed RE lowers. My front axle has caster adjustment via cam bolts. My goal here is to improve ride quality/ on road stability /handling/ cutting down on harshness. (Got brand new teraflex 9950shocks) Ideally i would like to push my front axle forward. I was told by a friend just try the adjustable uppers and keep the fixed lowers and play w/ the caster adj. IMO I think adj. Uppers and lowers would be best but with the axle already having it i dont want to have too many adjustable variables going on. Ive also considered CAD brackets as well. I believe their good for 3" arm drop and 1/2" forward movement of the axle. If im gonna spend $ on new adj. Short arms and/or Cad i would just go ahead and look into LA. I like the FST 4 link. Looks pretty sweet. Im well aware lifting has shortened the wheel base and steep arm angles don't help ride quality. My 90 degree shackle doesn't help. Holy crap that was long ...lol...give me your input. Thx
Old 07-22-2013, 09:30 PM
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Definitely go long arm if you have the money. Our kits can provide you with a 1-2" stretch in the front. Our kits also offer some of the easiest adjustable arms. Won't take any time at all to dial in caster and pinion angle.

I hope that helps, Feel free to ask any questions.

Kris Froehlich
Old 07-22-2013, 10:25 PM
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Originally Posted by Lead Foot
Definitely go long arm if you have the money. Our kits can provide you with a 1-2" stretch in the front. Our kits also offer some of the easiest adjustable arms. Won't take any time at all to dial in caster and pinion angle.

I hope that helps, Feel free to ask any questions.

Kris Froehlich
That's what im looking for. Does yours work with a 242 t case? Ive got a SYE for. the rear w/ shims, but because of the LP front its more challenging to get a happy driveline angle. Any exhaust modifications necessary? I have a 2000 model with pre cats. I Appreciate the input.

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Old 07-22-2013, 10:31 PM
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Yes, our skid works with a 242. And you shouldn't have to modify stock exhaust.
Old 07-22-2013, 11:31 PM
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Originally Posted by Lead Foot
Yes, our skid works with a 242. And you shouldn't have to modify stock exhaust.
Cool. As for adj. Upper and lower short ams....would those push the axle forward enough to make a noticable difference as far. As ride quality?
Old 07-22-2013, 11:51 PM
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Stretching the front forward isn't done to better the ride of the vehicle. It is done to achieve a better approach angle and to help center the weight of the engine between the front and back axles. It also helps with running bigger tires, you can trim all the fender you want out of the front but if your axle is too far back you start getting into the floor board.
Old 07-23-2013, 07:10 AM
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Originally Posted by Lead Foot
Definitely go long arm if you have the money. Our kits can provide you with a 1-2" stretch in the front. Our kits also offer some of the easiest adjustable arms. Won't take any time at all to dial in caster and pinion angle.

I hope that helps, Feel free to ask any questions.

Kris Froehlich
I've got a guy in my town that wants me to POSSIBLY do a long-arm swap for him. He's leaving in about 3 weeks for the southern part of the state on deployment. what's the delivery time on a long-arm kit?
Old 07-23-2013, 09:46 AM
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Right now we are about 2 weeks out on our Long arm orders. Let me know if you have any more questions.
Old 07-23-2013, 10:16 AM
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Originally Posted by Lead Foot
Stretching the front forward isn't done to better the ride of the vehicle. It is done to achieve a better approach angle and to help center the weight of the engine between the front and back axles. It also helps with running bigger tires, you can trim all the fender you want out of the front but if your axle is too far back you start getting into the floor board.
Makes sense. So from the standpoint of improving ride, would adj. Short arms help at all? Or would i be making a horizontal movement ...ive talked to some different people about this and some say with the caster adj. In the axle itself u might have too much adjustment ...
Old 07-23-2013, 10:38 AM
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No such thing as too much adjustment, as long as it doesn't cause clearance or strength issues, ect.

You MIGHT notice a slight improvement if the bushing are better quality. Your control arms angle on relation to the road will still be the same, maybe 1* less if you are able to stretch the arms out at all.
Old 07-24-2013, 08:02 PM
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Makes sense. For dd what's your standpoint on the radius arm design vs 4 link. I could see why the y links would bind during critical flex. Ive heard of some guys having pinion angle/ caster issues.
Old 07-24-2013, 08:14 PM
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I'm Running a RE 3.5" short arm on My XJ, I recently went from a Stock Upper/ Fixed lower to Teraflex Adjustable Uppers and Lowers it made a huge ride quality improvement and it works better offroad also .
Old 07-24-2013, 08:21 PM
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Originally Posted by Tom95YJ
I'm Running a RE 3.5" short arm on My XJ, I recently went from a Stock Upper/ Fixed lower to Teraflex Adjustable Uppers and Lowers it made a huge ride quality improvement and it works better offroad also .
I like teraflex. Never had any issues with their products. My re 3.5 is more like a 4.5" lift.
Old 07-24-2013, 09:00 PM
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Originally Posted by evan00xj
I like teraflex. Never had any issues with their products. My re 3.5 is more like a 4.5" lift.
Mine sits at 4.25" But I also have a heavy winchbumper, Sliders, Gastank skid, winch on mine. and it's been wheeled a Bunch
Old 07-24-2013, 09:26 PM
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Originally Posted by Tom95YJ

Mine sits at 4.25" But I also have a heavy winchbumper, Sliders, Gastank skid, winch on mine. and it's been wheeled a Bunch
Yea my kits about 6 years old. Absolutely 0 sag on these RE springs. Were at the same height. Overall nice stance for a dd/ weekend Wheeler

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