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#151 | |
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Join Date: Jun 2011
Location: Richmond,Va
Posts: 2,934
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Re: My caster mod (with pictures)
Quote:
![]() ![]() I have been thinking about elongating the upper cross shaft locating holes for finer adjustments, leaving the shims only for camber adjustments (1/8" of motion would equal .5 degrees of movement). I need to go back and look over your math and Scoti's alignment numbers.
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Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever! |
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#152 |
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Location: Missoula, MT
Posts: 934
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Re: My caster mod (with pictures)
I have become quite fond of this thread as of late, probably because I am at this point in my build and I wanted to say thank you all for being a part of this growth and development to improve our vehicles.
I know there is some discrepancy in the OE and aftermarket lower shaft index holes and I Just wanted to share what I removed from my truck last night. As far as I can tell from the amount of play on the ball joints and the shaft bearings coupled with speaking to the brother and mechanic of the long term owner of the truck my lower shafts on my 72 are original. The hole is indexed 1 1/2" back from where the shaft decreases in diameter to accept the arm (photo may be deceiving). I will post numbers on what my moog replacement shafts come indexed to and then have them re-indexed with 2 or 3 longer indexed hole locations for adjustment at a machine shop.
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#153 |
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Join Date: Sep 2013
Location: Vacaville CA
Posts: 490
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Re: My caster mod (with pictures)
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#154 |
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Join Date: Aug 2015
Location: Farmington Hills
Posts: 20
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Re: My caster mod (with pictures)
The pictures below are of my recently delivered CPP lower shafts. As you can see the indexing holes are already at 2" from where the shaft drops in diameter.
These will be going on an '87 2wd, should I bother getting holes drilled at 2.25"? |
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#155 |
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Join Date: Mar 2013
Location: Lakeside, Ca.
Posts: 320
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Re: My caster mod (with pictures)
What is the distance from hole to hole center? The factory ones are around 8.xx inches. Where as the pins are 9"
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#156 |
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Join Date: Aug 2015
Location: Farmington Hills
Posts: 20
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Re: My caster mod (with pictures)
I'll check when I get home. Does this influence anything, I thought only one end indexed in the the frame member?
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#157 |
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Join Date: Jun 2011
Location: Richmond,Va
Posts: 2,934
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Re: My caster mod (with pictures)
Only one does from the factory. What box did those shafts come in?
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Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever! |
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#158 | |
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Join Date: Mar 2014
Location: Cambridge, Ontario
Posts: 507
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Re: My caster mod (with pictures)
Quote:
I think all of these measurements would be best taken from the centre of the LCA shaft. That way, we could accurately compare any type of LCA shaft. Like this...
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#159 | |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Quote:
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1968 LWB C20 / AC / Wood Bed |
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#160 |
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Join Date: Aug 2015
Location: Farmington Hills
Posts: 20
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Re: My caster mod (with pictures)
So these will be going on a 1/2 ton '87 R10 so will have the rubber bushings.
The holes are 8.75 inches apart, 4.375 inches from the centerline of the shaft. I have included a picture of the box they came in. I checked the shafts that came out of these lower control arms and they appear to be the exact same measurements, distance from the ends as well as distance from each other. Am I missing something here, are the majority of the 1.5 inch measurements I've seen on this site from 72 and older trucks, or 3/4 ton trucks with steel bushings? Any insight would be greatly appreciated. |
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#161 |
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Location: China Spring, TX
Posts: 7,280
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Re: My caster mod (with pictures)
I have a 64 with Steel Bushings, here are my measurements before drilling on a stock unit:
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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#162 | |
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Location: Missoula, MT
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Re: My caster mod (with pictures)
Quote:
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69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
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#163 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
I got my bag mocked up, but it looks like it'll have stress in bad places. Then again, I've never run bags. Anyone know if the offset pictured will cause more than a marginal decrease in bag life? I also have no idea what the internal bumpstops on these bags look like. I'm a little worried that they aren't making solid contact as pictured.
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1968 LWB C20 / AC / Wood Bed |
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#164 |
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Join Date: Jun 2011
Location: Richmond,Va
Posts: 2,934
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Re: My caster mod (with pictures)
Have you put air in them (cycled them) to see if they settled out correctly?
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Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever! |
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#165 | |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,983
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Re: My caster mod (with pictures)
Quote:
I would make new uppers or re-drill the holes accordingly to keep the bag as straight as possible @ ride height.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#166 | |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Quote:
Yeah, shifting them forward seems like the best option at this point -- I should have waited on painting the plates! I wish I had just fabbed up some plates for the lower control arms now though, because then I could put the bags wherever I wanted them. I did find a cutaway of the SS bags though and the bumpstop looks like it covers the entirety of the bag top/bottom, being a non-issue.
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1968 LWB C20 / AC / Wood Bed Last edited by crakarjax; 10-26-2015 at 04:48 PM. |
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#167 |
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Location: Missoula, MT
Posts: 934
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Re: My caster mod (with pictures)
got myself my new Moog (part# k6147) lower shafts in the mail today! When I set them up against the old shafts I noticed something was not right!
The old shafts are longer than the new shafts!
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#168 |
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Re: My caster mod (with pictures)
New shafts
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#169 |
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Re: My caster mod (with pictures)
Old Shafts
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#170 |
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Re: My caster mod (with pictures)
And side by side...
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#171 |
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Location: Missoula, MT
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Re: My caster mod (with pictures)
In the photos yo will notice the overall length of the shafts themselves are the same, bot with and without the caps on. When comparing the end of just the shafts, not the knurling or lip but over all length of the entire rod, the index hole on both shafts are the same. It appears that there was a redesign to the new shafts at some point and they decreased the length of the large diameter (by 3/8" on each end to be exact) and used a longer rubber grommet to cover the distance. This is why we are getting different dimensions when comparing old shafts to new shafts, they are designed slightly differently, but keep and maintain the same geometry as the old shafts.
One of the biggest telling factors are the rubber seals/grommets used, there is a large difference between the old and new.
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#172 |
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Location: China Spring, TX
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Re: My caster mod (with pictures)
Can you just buy those new grommets somewhere?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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#173 |
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Location: Missoula, MT
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Re: My caster mod (with pictures)
I don't know, I haven't looked, sorry.
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#174 |
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Join Date: Jun 2012
Location: Chatsworth, CA
Posts: 47
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Re: My caster mod (with pictures)
About to give this mod a go this weekend. One thing I'm wondering is why it's necessary to remove and replace the original riveted stud on the saddle that serves to locate the shaft? If we're drilling the same size locating hole on the shaft won't the same locator work?
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#175 |
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Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,563
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Re: My caster mod (with pictures)
I reused it.
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