Yes... Another Caster Question

[Infidel Edition]

OK. The '93 axle is a High Pinion as I understand....
.... Correct?
96+ is the low pinion?

And I referenced a chart somewhere that says for a 5" lift, I want a 5* caster.
4" was like 5.5* ...

I know that I can put a large socket over the upper ball joint nut.... And the angle finder on top of that.

That's all good.

Here's my question. When I don't have a perfectly flat spot to park on... is there a 90* reference to use? = if I release the parking brake, I'll roll. Slowly, but it'll roll.
Thus, on a 5* slope.... I'm suddenly setting my caster to 10* or to 0* pending on up hill vs down hill.

[4.3LXJ]

Use an angle finder on the ground and reference on that angle

[Infidel Edition]

Use an angle finder on the ground and reference on that angle

I was thinking about that as an option.
But it felt like there should be some spot on the jeep to use as a reference point.

[4.3LXJ]

Castor is always relative to the ground. On an alignment rack the tracks are always level and that is their reference. Since you are parked on ground you need to use that angle instead

[prerunner1982]

OK. The '93 axle is a High Pinion as I understand....
.... Correct?
96+ is the low pinion?

84-99 front Dana 30 axles are high pinion.
2000-2001 front Dana 30 axles are low pinion.

Have read that some late 99s have the low pinion as well...