12 bolt housing ID help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**RenoKeene** · 06-01-2013, 10:55 AM

Pulled from a 71 GMC Custom 1/2 ton leaf spring BUT the bump stops are mounted on the housing instead of the frame and it had finned drums (could have been changed).
NF 3896839
GM 53
THS W005 2
L280
GON3
Ring gear 3817779 14:43 (3.07) GM 12-70 2

Going to a 3 series posi carrier and 6 lug axles.
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**RenoKeene** · 06-01-2013, 02:03 PM

Anyone?
It's the wider 58" housing.
Need more info before ordering parts...even the year would help.
No computer access, just this phone right now.
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Hawghauler · 06-01-2013, 05:46 PM

According to my list it's an open 3.07:1 from a 1971 c10. It could be something else, but that's what I find. Lots of aftermarket stuff for these trucks and drums may be aftermarket or from a different year.

**RenoKeene** · 06-01-2013, 06:42 PM

Thanks, that's what it should be but the bumpstops mounted on the housing puzzles me. All the manuals I have show them mounted on the frame.
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GASoline71 · 06-01-2013, 09:03 PM

Coil sprung trucks had the bumpstops on the frame. Leaf sprung trucks (like mine too) have them on the tubes.

Gary

**RenoKeene** · 06-01-2013, 09:23 PM

Thanks Gary, thats what I needed to know.
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06-01-2013, 10:55 AM	#1
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,011	12 bolt housing ID help Pulled from a 71 GMC Custom 1/2 ton leaf spring BUT the bump stops are mounted on the housing instead of the frame and it had finned drums (could have been changed). NF 3896839 GM 53 THS W005 2 L280 GON3 Ring gear 3817779 14:43 (3.07) GM 12-70 2 Going to a 3 series posi carrier and 6 lug axles. Posted via Mobile Device __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 Last edited by RenoKeene; 06-01-2013 at 02:07 PM.

06-01-2013, 02:03 PM	#2
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,011	Re: 12 bolt housing ID help Anyone? It's the wider 58" housing. Need more info before ordering parts...even the year would help. No computer access, just this phone right now. Posted via Mobile Device __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

06-01-2013, 05:46 PM	#3
Hawghauler Registered User Join Date: Nov 2012 Location: Whidbey Island/Edmonds,WA Posts: 360	Re: 12 bolt housing ID help According to my list it's an open 3.07:1 from a 1971 c10. It could be something else, but that's what I find. Lots of aftermarket stuff for these trucks and drums may be aftermarket or from a different year. __________________ If I have to be on 4 wheels, It has to be a classic Chevy 1967 c10 Longbed (Hawghauler/Icy weather transport) 2003 BMW K1200GT (Rain bike) 2007 Softail Deuce (Sun bike) 2009 Ultra Classic Electra Glide (Everything else bike)

06-01-2013, 06:42 PM	#4
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,011	Re: 12 bolt housing ID help Thanks, that's what it should be but the bumpstops mounted on the housing puzzles me. All the manuals I have show them mounted on the frame. Posted via Mobile Device __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

06-01-2013, 09:23 PM	#6
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,011	Re: 12 bolt housing ID help Thanks Gary, thats what I needed to know. Posted via Mobile Device __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394



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