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07-19-2009, 03:18 PM
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#1 |
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Registered User
Join Date: Aug 2007
Location: Michigan
Posts: 18
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12 bolt axle ID help
The axle does not appear to be original as the shock mounts are fabbed from angle iron and there are lines across the top of the axle where it looks like a pair of spring perches were located and have since been moved outward. The arrows show these grooves. There is a yellow grease pen writing of 3.20? on the top and the gear ratio comes out in this ballpark as well, as if it came from a salvage yard. There are no stamping numbers that I could find on the tubes. Below is all the information I know.
Off the differential housing: C0N20 123456 67 90 E24 20 3896839 57" from backing plate to backing plate, 6 lug axles and is a limited slip. The vehicle I am building is a 69 GMC Fleetside SWB I am just trying to figure out what this axle came out of or why they had to relocate the shock mounts and spring perches. Thanks in advance! Ryan       
Last edited by d3mon; 07-19-2009 at 03:26 PM. Reason: Pictures |
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07-19-2009, 06:36 PM
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#2 |
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Registered User
Join Date: Sep 2005
Location: Canton North carolina
Posts: 3,080
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Re: 12 bolt axle ID help
Have you pulled the cover yet? That looks to be a posi fill plug and you may have a posi carrier that needs clutches. The housing looks to be correct for our type of truck but something has gone on for sure. Is the truck a 2wd or 4x4. The shock mounts look like the mounts one my 4x4 (old ones not modified one). If it is a posi that may be the reason for the swap.
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67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle |
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07-19-2009, 06:59 PM
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#3 |
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Senior Member
 
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,887
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Re: 12 bolt axle ID help
I don't know much about the different diffs but this might help;
http://talk.classicparts.com/showthread.php?t=8208
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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