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03-06-2009, 04:16 AM
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#1 |
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Senior Member
 
Join Date: Nov 2001
Location: Rapid City, SD
Posts: 2,281
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POSI Question...
I know, it's been asked 100 times already,...
But... Here we go... If my truck is 50 miles away from me. So, I can't just go look at the rearend. And, I can no longer can read the SPID tag. Can a Axle housing code determine if a rearend is a posi or not? OK, I have the protect-o-plate code here.. it is... HC1219W I do have a code chart that shows me that HC = 3.73 1219 = I assume is the build date of DEC 19th (as my motor build date is 1220/DEC 20th) BUT, what does the W mean? Any thoughts.... Anyone...?
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My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White Last edited by 67 cst swb; 03-06-2009 at 04:17 AM. |
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03-06-2009, 04:40 AM
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#2 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: POSI Question...
Im gonna say you are gonna have to jack the rear up and spin the tires. However, you could have a worn posi and it wont grab very good. The only surefire way is to pull the cover.
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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03-06-2009, 04:46 AM
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#3 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: POSI Question...
I did a little searching on google and i *believe* the W is for Willow Run, Michigan.
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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03-06-2009, 05:02 AM
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#4 |
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Senior Member
Join Date: Nov 2001
Location: Rapid City, SD
Posts: 2,281
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Re: POSI Question...
That would make sense. Dang... Guess, I'll just have to wait and see...
Thanks
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My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White |
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03-06-2009, 01:13 PM
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#5 |
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*************
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,860
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Re: POSI Question...
Do you have the build sheet? I think there is something on there that tells whether it's a posi or not.
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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03-06-2009, 01:50 PM
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#6 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,022
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Re: POSI Question...
only way to tell for sure is jack up the back and spin the tires...
well, easiest way anyways. you can pull the diff cover too. Last edited by leddzepp; 03-06-2009 at 01:51 PM. |
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03-06-2009, 02:31 PM
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#7 |
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Jamie Hyneman is my twin
 
Join Date: Nov 2005
Location: La Junta, Colorado
Posts: 705
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Re: POSI Question...
If you have a posi, there should have been a sticker abover your jack. It would be a big white paper sticker with red lettering telling you not to jack up one side with the engine running iirc.
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Justin SOLD 1967 K10 Fleetside, 283, Front and Rear Posi SOLD Color Wiring Diagrams Now in High Resolution V8 and Cab and Cab and Chassis |
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03-06-2009, 11:38 PM
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#8 |
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Registered User
Join Date: May 2000
Location: Storm Lake, Ia
Posts: 1,449
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Re: POSI Question...
My Book states that the HC prefix is 1967--C14 Series (not sure what c14 is) positraction-3:73 Ratio
The W indicates The warren Plant
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