2011 jk 2 dr 4 inch lift driveshaft - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 08-24-2015, 09:37 PM Thread Starter
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2011 jk 2 dr 4 inch lift driveshaft

anyone with a 2 door with 4 inch lift tell me there measurements of there control arms I'm trying to get this pinion right on anyone been there before ?
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post #2 of 6 Old 08-25-2015, 02:21 PM
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Quote:
Originally Posted by jeepjkmango2011 View Post
anyone with a 2 door with 4 inch lift tell me there measurements of there control arms I'm trying to get this pinion right on anyone been there before ?
If you have stock uppers and are looking for front lowers then I would recommend 22 7/8" based on my experience with my rig. That should get you about 4* castor.

FYI here is all the info I compiled when I was searching for the same info:

TF wants the passenger side lower arm longer to eliminate pull to the right.

Rock Krawler says front lowers should be set to 23 1/8 and you can use the factory uppers for their 3.5" Flex lift.

Manufacturer Front Upper Front Lower

Stock 18 13/16" 22 5/8"

Currie 18 3/4" 22 5/8"

Poly Performance 18 3/4" 23 1/4"

Teraflex 19 1/2" 24"

OK4WD (Tera Kit 2dr) 18 1/4" 22 3/4"

Project JK (Tera Kit) 18 7/8" 23"

MetalCloak 2.5 - 3.5" Lift 5 Degrees Castor = Lower 18 3/4" and Upper 23 1/16"

Factory Arms Castor at 22 10/16"length
+0" Lift 4.2*
+2" Lift: 3.2*
+3" Lift: 2.7*
+4.5" Lift: 2.2*

Synergy Fixed Arms at 22 14/16" length
+0" Lift 6.5*
+2" Lift 5.5*
+3" Lift 5.0*
+4.5" Lift 4.5*
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post #3 of 6 Old 08-25-2015, 03:01 PM
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Please set your front control arms for proper caster and not pinion angle...

We recommend a little longer for improved caster to have the larger tires track better on the highway. Works great for lower lift heights..

RK
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post #4 of 6 Old 08-25-2015, 03:24 PM
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We need to know what drive shafts you are running and if you are asking about front or rear before we can give you correct suggestions.

The advise above would be correct for a stock drive shaft in the front.

With 4 inches of lift you should increase your rear pinion angle to increase shaft life.

If you are running aftermarket double cardan shafts you need to set your pinion. The front is a crap shoot and you will need to increase pinion angle until there is no vibration then maybe increase it a little more. In the rear the pinion needs to be about 1 degree lower than the driveshaft.

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post #5 of 6 Old 08-25-2015, 03:39 PM Thread Starter
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I have Tom wood drive shaft front and rear and my rear is set perfect but I pretty much lined up my front pinion to and I believe that is what's messing up my steering with some bump steer and dw, I have skyjacker fixed lower and rubicon adjustable uppers
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post #6 of 6 Old 08-25-2015, 10:25 PM
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Pinion is set by rear upper control arms, castor by front lower control arms.
if you have DW how do you know your rear is set right? DW is a totally different animal than bump steer. Could be lots of things how are your ball joints? Tires? are the drive shafts out of balance? Tie rod bent, etc... lots of things could be causing dw, try removing one "item" at a time and figure out which variable is causing the dw. Your other thread about drag link flip , that can help but its not gonna be a magic cure all for DW.

2011 Jk 2 door 6 speed. 5.13 gears, 1350 driveshafts, cooper sst+ 35s, warn 9.5, various armor, 1/4 pounder bumper, 12 inch King coil overs, CB, still running the dana 30 sleeved and gusseted up front. Someday wanna go with 1 ton axels but for now I love my JK.
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