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Old 07-26-2013, 12:49 AM   #1
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rear adj upper control arms

hi im on my 3rd rear u joint in 5000 miles, and I bought reaR UPPER rustys adj control arms , how long do they have to be.? my lift is a 4in skyjacker springs s.y.e, tom woods ds and the rest of the control arms r rustys offroad adj's I don't really have bad vibes on the high way , I do notice the shifter moves a little but don't feel any thing in the seat or wheel .

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Old 07-26-2013, 01:37 AM   #2
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How is your pinion angle?

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Old 07-26-2013, 07:12 AM   #3
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Do you have a transfer case drop? This could be keeping the vibes down some.

When I did my SYE/CV driveshaft, I removed the stock UCAs and used a bottle jack to rotate the axle so that the pinion pointed directly at the transfer case, with no deflection at the rear most u-joint. Then I set the UCAs length to maintain that angle. I never really measured them, just set them for the proper pinion angle.
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Old 07-26-2013, 09:24 AM   #4
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I dont have a t/c drop and im trying to set the pinion angle thats y i bought adj. Control arms
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Old 07-26-2013, 09:28 AM   #5
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I just bought my jeep in feb. Wit 62k. N now it has allmost 70 on it
The jeep already had the springs n s.y.e. and drive shaft wen i bought it . Im just trying to fix. The old owners mess up
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Old 07-26-2013, 09:56 AM   #6
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The pinion angle should be the same as the driveshaft angle with an SYE and dc shaft.
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Old 07-26-2013, 10:27 AM   #7
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Asking what length the arms need to be is the wrong question. What is your pinion angle and what is the drive shaft angle? IE, what kind of difference is that axle-end u-joint seeing?

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