If I put in air lift helper springs in the rear with an dual add a leaf, do I need new shackles to get a 2" lift in the rear? Does the air lift replace the rear shocks, or do the rear shocks stay? If the rear shocks stay, should I upgrade them to bilstein 5100's with 2" lift length?
How much lift does a single add a leaf add?The air bags add about 1/2" of lift themselves.
The two leaf aal is 2.5" lift iirc so if you add airbags you will probably be around 3"
The shocks stay.
You don't necessarily need to replace your rear shocks with 2" lift or less if they are not worn out.
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So then a single add a leaf, plus the air lifts, will give about 2" but the air lift I am sure effects min and max left right? So as the leafs start to sag, it can be boosted with the air lift?With your truck being a 2012, it really depends on how your leafs look now, if they're pretty flat it may get you back to normal. If your springs are good, I'd say maybe 1.5".
So your saying no need for the aal at all? Especially if I upgrade to bilstein 5100's in the rear?why are you leaning toward aal + airbags instead of extended adjustable shackles + airbags?
The airbags are already going to support any added weight - no real need to do aal (at least for capacity reasons).
Any reason it's 4 degrees specifically? I've been seeing 2 and 3 recommended in some cases, never 4. But I'm all for doing keeping things easy on my drivetrain.Do get the machined steel 4 degree shims.
Easier to put them in now while you are doing all this
and you will need them as the Dakar springs have a
flatter angle that needs compensating.
You can but you will get coil bucket contact. If you have aftermarket upper control arms like SPC's then you can avoid this issue. Note that you will still need to grind about 1/4-1/2" off the coil bucket to clear the ball joint boot.So, quick question here … Can I add 2.5 strut spacers to a PRO-4X ? I have a 2014 with 2 inch strut spacers. Everywhere I look I get "does not fit Pro-4x …. what's the deal? Help help please