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Old 02-11-2013, 12:56 PM   #1
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sye question

When doing the sye conversion, do the control arms for the rear need o be adjustable? Some lifts do not have adjustable control arms, so if this is a requirement it will help me narrow down my selection..
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Old 02-11-2013, 12:57 PM   #2
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yes.

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Old 02-11-2013, 08:56 PM   #3
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yes.
Why? It doesn't make sense to me.
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Old 02-11-2013, 09:48 PM   #4
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If I understand correctly, installing the sye is intended to correct the pinion angle and eliminate vibration... The pinion angle is adjusted by the manipulation of the control arm adjustments.

My goal is to buy a lift and do the sye later, but I don't want to buy a lift with fixed control arms, just to replace them with adjustable ones later.

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Old 02-11-2013, 10:13 PM   #5
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You are close...

Installing a SYE moves the slip yoke from the T-case output ( making it fixed ) to the driveshaft itself. The Double Cardan joint of the ( CV ) drive shaft is the key component to cancelling vibrations of unequal driveline angles when set up properly... which would be inline with the pinion output of differential. For this reason it is required to rotate the pinion upward to point directly at the t-case output... allowing the double cardan joint to cancel the vibes by splitting the difference in angles between the two ujoints within the double cardan H-Yoke.
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Old 02-11-2013, 10:57 PM   #6
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With the extra u-joint, I don't know why adjusting the rear would be big deal. That's why you add the cv joint.
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Old 02-12-2013, 06:25 AM   #7
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Quote:
Originally Posted by RepairMan View Post
With the extra u-joint, I don't know why adjusting the rear would be big deal. That's why you add the cv joint.
Read this..... you will understand much better.... and I don't mean scan over it.... read it, and read it again. There is a lot of material to absorb and get a grasp of.

Driveline 101
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Old 02-12-2013, 08:38 AM   #8
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Quote:
Originally Posted by TnDz TJ View Post

Read this..... you will understand much better.... and I don't mean scan over it.... read it, and read it again. There is a lot of material to absorb and get a grasp of.

Driveline 101
That was a good read, thanks!

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