2.5" lift -- advice needed
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I have a different companies 2.5" lift and after having it without caster correction for a few months, I'm going to be getting the AEV geometry correction plates. They run $100 and I would seriously look into them if you're just doing some light wheeling.
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When you lift the suspension, the axle tilts, which raises the pinion, and lowers the caster. Low caster causes flighty steering. If you choose to raise the caster, you need to lower the pinion. To do that, you get cam bolts, longer/shorter fixed control arms, adjustable control arms ... or these brackets.
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I agree with everyone else. I did my RC 2.5" in my driveway in 8 hours. I did use a cordless impact which sped things up a bit. 4 floor jacks, 3 ton jack and a couple chunks of 4x4 wood scraps, Loctite and a torque wrench. Make sure to go back and re-torque everyting after a couple days of driving just to be on the safe side though.