Pinion Angle

T

TC2019

New member
I have a 3.5" lift on my 2014 JKU but I have factory arms. People always tell me I need to buy adjustable arms to correct caster/pinion angle, I just don't want to. I'm waiting until I save the money for long arms.

So question is will it cause a issue or failure to axle?
 
TC2019 said:
I have a 3.5" lift on my 2014 JKU but I have factory arms. People always tell me I need to buy adjustable arms to correct caster/pinion angle, I just don't want to. I'm waiting until I save the money for long arms.

So question is will it cause a issue or failure to axle?
Click to expand...

You will want front lower arms to adjust your caster up front but in the rear you don't need the rear uppers right away. If you get and aftermarket rear shaft then yes you will need rear uppers
 
TC2019 said:
I have a 3.5" lift on my 2014 JKU but I have factory arms. People always tell me I need to buy adjustable arms to correct caster/pinion angle, I just don't want to. I'm waiting until I save the money for long arms.

So question is will it cause a issue or failure to axle?
Click to expand...

What is your pinon angle with the factory LCA? How does it drive?
 
cozdude said:
Castor and pinion are different. Pinion doesn't effect how it drives, only caster does
Click to expand...

One effects the other. You can't change one without changing the other. So technically if you have 4* up pinion it will have a effect on how it drives.

Question for the OP - Are you still running stock drive shaft? Do you have driveline vibrations?
 
branman said:
One effects the other. You can't change one without changing the other. So technically if you have 4* up pinion it will have a effect on how it drives.

Question for the OP - Are you still running stock drive shaft? Do you have driveline vibrations?
Click to expand...

Yes technically you are right and that pinion angle is effected in both but the verbiage is different when referring the front and rear. As you know Pinion angle is used to when referring to the rear shaft. Caster is used when mentioning the front.
 
cozdude said:
Yes technically you are right and that pinion angle is effected in both but the verbiage is different when referring the front and rear. As you know Pinion angle is used to when referring to the rear shaft. Caster is used when mentioning the front.
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You are correct sir. I was really referring to caster and when talking tech you should be specific and use the correct verbiage.
It's all related to how well it drives with the factory arms. If the OP knows the problems and can deal with the drive until he gets the LA system then it's all a mute point right?
 
branman said:
One effects the other. You can't change one without changing the other. So technically if you have 4* up pinion it will have a effect on how it drives.

Question for the OP - Are you still running stock drive shaft? Do you have driveline vibrations?
Click to expand...


Still on stock drive shafts and I don't have and vibration. Jeep run great it's only got 11k miles on it.
 
TC2019 said:
I have a 3.5" lift on my 2014 JKU but I have factory arms. People always tell me I need to buy adjustable arms to correct caster/pinion angle, I just don't want to. I'm waiting until I save the money for long arms.

So question is will it cause a issue or failure to axle?
Click to expand...

Don't know what "people" you are referring to but, you only need adjustable rear upper arms IF you install a u-joint style double cardan drive shaft. This is so that you can set your pinion angle. Adjustable front arms aren't necessary but, they will help you to set your caster after installing a lift.
 
cozdude said:
You will want front lower arms to adjust your caster up front but in the rear you don't need the rear uppers right away. If you get and aftermarket rear shaft then yes you will need rear uppers
Click to expand...

This is good info. It never crossed my mind that I would need rear control arms once the new rear driveshaft went in.

OverlanderJK said:
Don't buy them. You can run 8" of lift on factory arms. I read it on the Internet. Fuck the world!
Click to expand...

Lol
 
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