Am I measuring caster wrong?

KNN

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I’m getting different numbers that don’t seem to match up.

85.5 degrees off the diff
0-2 degrees from top C
5 degrees from the bottom C

Numbers change depending on placement of angle finder. I have an appointment for an alignment but I’m curious what I’m doing wrong?

All measurements taken from driver side on a Clayton 3.5 Overland Plus lift.

C1586E90-F93F-4453-9A32-756096EC1FD9.jpeg

E3BEA01A-DD69-48C1-9E07-2CB6793E8657.jpeg
9C5FB618-715F-40A1-B134-0B393C0B2037.jpeg
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word302

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The Cs are extremely hard to get an accurate measurement from because it’sa compound angle. Any rotation of the measuring device will change the angle. The diff is 6° off from 0 so probably pretty close there.
 
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KNN

KNN

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The Cs are extremely hard to get an accurate measurement from because it’sa compound angle. Any rotation of the measuring device will change the angle. The diff is 6° off from 0 so probably pretty close there.
The passenger side diff reads 86.9. I’ve read this is not unusual. Based on these values is it safe to say I’m running between 9-10 degrees of caster?

9DADDFD4-6D19-43BC-8153-A3E6C6D05EA5.jpeg
 
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KNN

KNN

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I’m confused. How does the 6 degrees factor in then?
 

word302

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The passenger side diff reads 86.9. I’ve read this is not unusual. Based on these values is it safe to say I’m running between 9-10 degrees of caster?

9DADDFD4-6D19-43BC-8153-A3E6C6D05EA5.jpeg
If the number decreases as you rotate the angle-finder down, then yes. If it increases then you are showing 3-4°, which is much more likely. This all assumes your floor is perfectly flat.
 
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