Adjustable control arm settings

[gixer]

I am running RE 5.5 front coils.
I have their fixed lowers for this and have now their adjustable uppers.
Just looking for an idea where to get started.
What would be a setting to start with???
Thanks

[Tally_XJ]

Since your lowers are fixed, set the uppers to where you have the best pinion angle and run it.

[xjbubba]

Supposedly, a 5" lift requires LCA length of 16.62 in. and UCA length of 15.2 in. This should result in proper caster, which, in my opinion is more important than pinion angle for a "daily" driver. Since your LCAs are fixed, I'd set the front on a floor jack with wheels and raise the jeep so that both wheels are just off the floor, set jack stands under the ends of the axle (but not touching--just back-up safety), remove tires, use angle finder to determine caster, and adjust UCAs for a minimum of 4 degrees caster. As I recall, 7 degrees is optimal, but 4 may be OK for handling and help with drive shaft angle.

[gixer]

Supposedly, a 5" lift requires LCA length of 16.62 in. and UCA length of 15.2 in. This should result in proper caster, which, in my opinion is more important than pinion angle for a "daily" driver. Since your LCAs are fixed, I'd set the front on a floor jack with wheels and raise the jeep so that both wheels are just off the floor, set jack stands under the ends of the axle (but not touching--just back-up safety), remove tires, use angle finder to determine caster, and adjust UCAs for a minimum of 4 degrees caster. As I recall, 7 degrees is optimal, but 4 may be OK for handling and help with drive shaft angle.


Are you measuring this off the yoke?

[xjbubba]

You could use the yoke if you know what the factory designed pinion angle is. Your FSM should tell you that. Other wise, the flat on top of the upper ball joint should be OK to set the angle finder.