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Old 08-25-2011, 02:24 PM   #1
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Caster angles and shims.

I've been reading for a few days and I need a visual of how to measure the caster angle. Also need pictures of how the shims go in if I need them. My cj is lifted 4" other than that all stock. I need a variety of picture from different angle and distances away. Thanks

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Old 08-25-2011, 06:48 PM   #2
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Quote:
Originally Posted by RoughRide
I've been reading for a few days and I need a visual of how to measure the caster angle. Also need pictures of how the shims go in if I need them. My cj is lifted 4" other than that all stock. I need a variety of picture from different angle and distances away. Thanks
What is the issue?

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Old 08-25-2011, 08:35 PM   #3
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I need photos of how to install shims. And where to place anglemeter. There isn't any issue I know the fix
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Old 08-25-2011, 08:37 PM   #4
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Quote:
Originally Posted by RoughRide
I need photos of how to install shims. And where to place anglemeter. There isn't any issue I know the fix
When you say caster angle are you talking about the angle of the front and rear axle?
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Old 08-25-2011, 09:13 PM   #5
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Front.
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Old 08-26-2011, 09:51 PM   #6
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Your shackle length is different than mine! and the avatar is a YJ? Are you working on a CJ? If you bring the pinion to high you will scewup your steering and your pinion oiling!
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Old 08-27-2011, 07:13 AM   #7
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Look closer bud. Wrangler body, cj chassis
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Old 08-29-2011, 10:25 AM   #8
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Looks like a Wrangler to me ! Bud. when people ask questions to give help. Don't get a fricken attitudes BUD..
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Old 08-30-2011, 03:27 PM   #9
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Assuming you are still spring-under-axle, you would install steel (never aluminum!) shims with the fat end forward between your front axle perches and the spring pack. This will have the effect of tilting your pinion down (hard on the ujoints) but improving your caster angle. You need 5 to 7 degtrees positive caster ... that means tilted back from vertical. This will prevent the "darty-ness" many CJs get after a significant lift... and will improve tracking and return-to-center.
Lots of good reading here, near the bottom of the page:
Driveline 101
They are also a good source for steel shims.

When I had my '71 CJ5 with 3" lift, and swapped in a '74 D30 to replace the D27, I could barely drive over 30 mph and keep it between the lines. I got an alignment(didn't have an inclinometer)... that told me I was at 1° positive caster. I ordered 5° shims... installed them fat side forward, resulting in 6° positive caster... and after that the rig tracked straight and true, even at a scary 75 mph...
More info:
Dana 30 and Dana 44 Front Axle Caster Adjustment – Spring Wedges | jeepfan.com

HTH, let us know if you need more info.

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