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Old 02-12-2002, 12:41 AM   #1 (permalink)
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Solid Axle Caster ????"s

Does anyone have a how-to web page on caster alignment? I've contemplated attempting it, but have never heard of anyone doing it until now. 4runner still has the push-pull steering and I bolted my torque rod after crossing three lanes of traffic during an emergency stop. It has Black Diamond 3.5" springs and Black Diamond XT shocks on the front as well as poly bushings everywhere. Eventually, I hope to install hy-steer as well as some flexy 5" springs such as Allpro's. My question is: How difficult is it to get accurate adjustments of caster on a solid axle? Has this mostly been done to trailer queens or daily drivers that see 20k miles per year? If it is not recommended to be done at home, Can anyone recommend a shop in Portland, OR or even in the Northwest. All suggestions and personal experiences welcome!
Thanks again guys,
Scott
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Old 02-12-2002, 05:15 AM   #2 (permalink)
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2 ways to adjust caster; you can cut and rotate the knuckles or use shims between the spring and axle.
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Old 02-12-2002, 06:52 AM   #3 (permalink)
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If you can weld and grind, do it yourself. It will make your DD and trail rig drive better. There are plenty of how-to web pages out there. Sorry I don't have one on me right now but I'm sure someone else will chime in with one
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Old 02-12-2002, 07:15 AM   #4 (permalink)
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look on the Suzuki BB or this BB for a thread entitled.....Rotating knuckles.

Last edited by seabastard; 02-12-2002 at 12:00 PM.
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Old 02-12-2002, 10:17 AM   #5 (permalink)
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Not sure about toy axles, but factory castor settings for D44's is 6 degrees negative castor. As mentioned, you can adjust it by either rotating the knuckles or using shims. Shims should probably work for you, it seems like your angle shouldn't be that far out. I rotated the knuckles on my full width 12 degrees, then used a combination of 6 degree shims and milling (actually careful work with a grinder) the pad on the housing and rotating the other spring pad another 6 degrees. I used a simple dial angle indicator ($15 at sears) and placed it on my flat top knuckles to get the angle emasurement. My castor angle is actually 10 degrees negative now, but it drives fine, up to 80 mph, I haven't gone faster than that yet. From what I've heard, you'll start to have problems real fast as you approach or if you have a positive castor angle.
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Old 02-12-2002, 10:25 AM   #6 (permalink)
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Here you go:

http://www.hunter.com/pub/undercar/2573T/steer.htm

BTW: Caster angle is probably *the* hardest thing to measure without special equpment. Best advice is to take it to an alignment shop to get a reading then take it home and correct it if needed:

http://4crawler.cruiserpages.com/4x4...shtml#Steering
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Old 02-12-2002, 04:36 PM   #7 (permalink)
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hey wilson can i borrow that angle finder when i do my sas

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Old 02-12-2002, 06:29 PM   #8 (permalink)
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Quote:
Originally posted by Wilson
Not sure about toy axles, but factory castor settings for D44's is 6 degrees negative castor. As mentioned, you can adjust it by either rotating the knuckles or using shims. Shims should probably work for you, it seems like your angle shouldn't be that far out. I rotated the knuckles on my full width 12 degrees, then used a combination of 6 degree shims and milling (actually careful work with a grinder) the pad on the housing and rotating the other spring pad another 6 degrees. I used a simple dial angle indicator ($15 at sears) and placed it on my flat top knuckles to get the angle emasurement. My castor angle is actually 10 degrees negative now, but it drives fine, up to 80 mph, I haven't gone faster than that yet. From what I've heard, you'll start to have problems real fast as you approach or if you have a positive castor angle.
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Old 02-12-2002, 06:54 PM   #9 (permalink)
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Old 02-12-2002, 07:09 PM   #10 (permalink)
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factory spec on a 84 was +2.5 deg not a whole lot esp when your used to looking at specs for a car..
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Old 02-13-2002, 12:44 AM   #11 (permalink)
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Quote:
Originally posted by Pavement Pounder83
hey wilson can i borrow that angle finder when i do my sas

Drew
Yep, no problem
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Old 02-13-2002, 08:12 AM   #12 (permalink)
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Quote:
Originally posted by Wilson
Not sure about toy axles, but factory castor settings for D44's is 6 degrees negative castor. As mentioned, you can adjust it by either rotating the knuckles or using shims. Shims should probably work for you, it seems like your angle shouldn't be that far out. I rotated the knuckles on my full width 12 degrees, then used a combination of 6 degree shims and milling (actually careful work with a grinder) the pad on the housing and rotating the other spring pad another 6 degrees. I used a simple dial angle indicator ($15 at sears) and placed it on my flat top knuckles to get the angle emasurement. My castor angle is actually 10 degrees negative now, but it drives fine, up to 80 mph, I haven't gone faster than that yet. From what I've heard, you'll start to have problems real fast as you approach or if you have a positive castor angle.
44's have different caster settings depending on what vehicle they came out of. Example: I think its Scout 44's that have zero caster from the factory, which sucks...

Also, you've got the positive/negative thing backwards. You WANT positive caster. Negative would be bad...
http://aligncraft.com/terms/terms.html#FrontCaster

As Roger mentioned, its pretty difficult to measure caster (at least on a Toy axle), however on a D44 w/ flat top knuckles you can set an angle finder on the flat top to get an easy (appoximate) caster reading...
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