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Unread 08-07-2010, 02:27 AM   #16
Jeepster83
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2003 TJ Wrangler 
 
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Quote:
Originally Posted by Knuckelhead View Post
When I installed my HPd30 5 years ago i had adjustable lowers (TF) and OEM uppers with a 4" lift, I changed to Currie lowers later on. That was 4 years ago and it's still working well:

LP front axle drive shafts don't do well with this:

...
Oh yeah, that's a TW DS...
i think what this means is because of the relationship between caster and pinion angle, and also because its worked for others with any combination of upper and lower control arms, that you angles need to simply be within a certain range and there really may not be a "perfect" angle for either. just within a range of difference in degrees.

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Unread 08-07-2010, 01:27 PM   #17
Knuckelhead
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Quote:
Originally Posted by Jeepster83 View Post
i think what this means is because of the relationship between caster and pinion angle, and also because its worked for others with any combination of upper and lower control arms, that you angles need to simply be within a certain range and there really may not be a "perfect" angle for either. just within a range of difference in degrees.
I'm running 4.5 degree caster...
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Unread 08-07-2010, 01:34 PM   #18
Jeepster83
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Originally Posted by Knuckelhead View Post
I'm running 4.5 degree caster...
im probably going to look pretty stupid, but i dont know what my pinion or caster angles are off the top of my head. can you clarify whether you adjusted either of them and why?
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Originally Posted by mrblaine View Post
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Unread 08-07-2010, 01:43 PM   #19
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If your caster angle is too little or too much your Jeep will track terribly and for some reason my steering feels very sloppy. Once caster is adjusted properly the Jeep SHOULD track and handle as well as it did stock (unless you have issues somewhere else)

Pinion angle is set to get rid of driveline vibes caused from too severe of driveshaft angles.
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Unread 08-07-2010, 02:36 PM   #20
Knuckelhead
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Originally Posted by Jeepster83 View Post
im probably going to look pretty stupid, but i dont know what my pinion or caster angles are off the top of my head. can you clarify whether you adjusted either of them and why?
With the belly-up TC skid, 4" lift, HPd30 and 35" tires my pinion angle is within 1 degree of being straight with the DS. I then checked my caster angle and it was at 4.5 degree's which is proper for my setup...HTH
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hp30 , d30 , dana 30 , uca , upper , control arm , tj , wrangler

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