Ok i am getting a lot of different info on the forum with regards to castor and pinion angle with a 1310 double cardon driveshaft.

I have an 08 JKU with approx 5 inches lift

I have read two different ways to measure the castor. I know that measuring from the pinion flange is best option. With the pinion flange at 0 or 90 degrees to the ground the castor is -6. I tried that and it was too much for my driveshaft. So i am curious to see what people set theres castor at in relation to the pinion flange. I pointed it straight at the t-case for now but that makes my caster +1 and comes with really flighty steering.

So if anybody has a setup close to mine can get me a pinion angle to set it too i really appreciate it. Its 116 degrees outside in Phx and the crawling under and adjusting the arms is getting old. Id just like to have a nice balance between driveline angle and castor.

Thanks forumites.

 

Come on peeps i cant be the only shade tree mechanic without an alignment rack looking for advice from an experienced shop/mechanic

 

With that much lift, you will have a hard time finding a compromise between caster and pinion angle.

What you should do is get the caster measured on an alignment rack to get an accurate reading.
Then when you get home, use the angle finder to keep track of how much you change it.
There is no accurate way the caster can be measured at home. (Well, not without a bunch of home-made stuff, anyway.)

 

Thanks for response i guess i was just hoping somebody went through what I'm trying to figure out and could give me a pinion flange angle relative to the ground that i can start from. I got it set it +7 relative to the ground and that i know translates to +1 on the pinion. I know factory castor is -4.6 or +1.4 on the flange i tried 0 90 degrees from the ground and that was too much. I guess ill have to take it to alignment shop i just like to get in the ball park myself since every time i wheel it will be off again.

 

While on the alignment rack, write down what the machine says is your caster. Before the Jeep is moved, measure the angle of the pinion flange relative to the Jeep frame rail. From then on, you can indirectly know what your caster is by measuring the angle of the pinion flange to frame rail.

 

Thats. Good idea thanks for the insight was just hoping to avoid paying for alignment.