which 12 bolt is better - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*rage'nrat638* · 03-19-2003, 07:09 PM

does any body know which 12 bolt is better 12 bolt from a car???
12 bolt from a truck ??????
ALSO WHAT YEAR DID THEY STOP MAKING 12 BOLTS???????
my 12 bolt is from a truck---and i just got another one yesterday
for free for a spare ,,,Had a guy tell me the one from a truck is no
good ... just stood there and listened to him run his mouth..
now hes got me wondering????? please help.

**Captkaos** · 03-19-2003, 07:43 PM

12bolts from a car are stronger due to a larger pinion gear shaft.
As for it being no good, I disagree. That is like the blanket statement the 9" Fords are superior. Last year for trucks was 1981.

*rage'nrat638* · 03-19-2003, 07:52 PM

would'nt you think they would have a stronger pinon in a truck?
why should cars be so lucky ...... haven't ran across any car 12 bolts must be why they are so hard to find.....1981 ok.wonder what year was the last for cars????

**crossy** · 03-19-2003, 07:58 PM

CAR REARS DON'T INTERCHANGE WITH TRUCKS. The last year for cars was like 1971 then all GM went to corporate 10 bolt 8.5". gotta watch around the 69-70 era as all the gm makes had their own unique 12 bolts. chevys being most popular of course. best place to look for one under a truck from 78-81 is a diesel and there are plenty of dead ones in the bone yards. DAVE

DennyB · 03-19-2003, 08:31 PM

Nothing wrong with that truck 12 bolt. Use it.
Unless your putting 900 HP through it at the track every week

*rage'nrat638* · 03-19-2003, 08:41 PM

well thats what i got under my truck ,,,it will be something to lookout for with this new engine 850h.p. guess i will have to stay away from the track...very sticky....

AirMale · 03-19-2003, 09:48 PM

I won an auction for a 12 bolt truck rear(drum to drum) on Ebay. It should be here any day. I bid $100 and was the only bidder. I can't believe how affordable the the eaton posi and gear sets are, can't wait to build it!

**crossy** · 03-19-2003, 10:06 PM

airmale , keep my email and phone number around ( see ad for 84 front clip in NJ ) I hate to tell you this now but I would have sold you a 12 bolt for that and no freight charges .I live an 75 minutes from you. I also have a friend with place in Margate that I visit several times during summer months. DAVE

*rage'nrat638* · 03-19-2003, 10:09 PM

well the other day i was at a steel mfg. that owned a auto shop
next door and the guy died... working on there doors (thats what i do if no one figured out by now) and there was one old rear end
laying out back so i went and flipped up and sure as hell it a 12 bolt i ask if i could have it they said (its all yours) i picked ot up all
by my self and put it in my van before the guy went out the door i was so happy.
the one in my truck i have beat it-up preaty good .its work great
so you can understand why i stood there with my mouth open
when that guy started bad mouthing truck rearends
mine has 33 spline moser axels richmonstreet 4.11 gears billet
rear caps and alum T/A rear cover w/ adjusters and c-clip elininators. let me know how it goes........MARK

AirMale · 03-19-2003, 10:10 PM

A couple days late....I grew up in margate, small world!

*rage'nrat638* · 03-19-2003, 10:25 PM

hay look at the brite side your almost at 100 post keep posting....

AirMale · 03-19-2003, 10:28 PM

what do I win?

*rage'nrat638* · 03-19-2003, 10:45 PM

your very own custom avatair isnt that special.......i tried to figure
it out but sould not i can't even figure out how to get my web site to come up..not mr computer.

AirMale · 03-19-2003, 10:50 PM

kewl.....that means I'm not the only knucklehead hear

*rage'nrat638* · 03-19-2003, 10:58 PM

hay my wife is a computer analyst and can't figure it out o,boy

**crossy** · 03-19-2003, 11:02 PM

hey you two--- get a room :-) . a chat room . L8R.

AirMale · 03-19-2003, 11:02 PM

Are you watching CNN? I think we lanched a cruise missle. They're saying that it was just a strategic hit....GOD BLESS OUR TROOPS

PHOENIX · 03-20-2003, 12:24 AM

I looked for 12 bolts when I was at the yard last time. I only went to one yard but I checked em all and then some. No 12 bolts anywhere, I bet they probly had them in the shed up front. Next time Im gonna ask if I can see what they have in the big shed.

Tom · 03-20-2003, 04:12 PM

Eddie, you didnt find any 12bolts? Give BASELINE AUTO RECYCLERS a call. They rock. I can even stop by there on my way to work one day and pick one up for ya if you go with them.

*rage'nrat638* · 03-20-2003, 04:18 PM

the one i narrowed fur under my truck now ....i got when i went to penn. to my wifes mom&dads house the kids got to sit on it
all the way back to il. but i got it ........ tryed around here they laughed. and said no... i did find one from a 66 impala but he wanted $500.00 i said no thanks... the one from penn. cost me
$150.00 i only used the housing... good luck.....MARK

**Captkaos** · 03-20-2003, 05:42 PM

Quote:

Originally posted by marksdoor69
would'nt you think they would have a stronger pinon in a truck?
why should cars be so lucky ...... haven't ran across any car 12 bolts must be why they are so hard to find.....1981 ok.wonder what year was the last for cars????

Trucks didn't really need that much strength in the pinion area as they were low powered. Chevelle's with 396 and 454 backed by 4speed it would be warranted. Last year for a 12bolt in a Car would be 1973. 12bolts for cars are priced like gold. Moser is making them again though.
http://www.moserengineering.com/mose...s.asp?CatID=28

If you really want some strength for that much power and use slicks, you need an aftermarket setup. I don't think a stock 12bolt will hold up to that kind of abuse for long.

How about a 9" housing with Stranges' 12bolt drop in. Lighter, less hp loss, no c-clips
http://www.strangeengineering.net/catalog/64.html

03-19-2003, 07:09 PM	#1
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	which 12 bolt is better does any body know which 12 bolt is better 12 bolt from a car??? 12 bolt from a truck ?????? ALSO WHAT YEAR DID THEY STOP MAKING 12 BOLTS??????? my 12 bolt is from a truck---and i just got another one yesterday for free for a spare ,,,Had a guy tell me the one from a truck is no good ... just stood there and listened to him run his mouth.. now hes got me wondering????? please help.

03-19-2003, 07:43 PM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	12bolts from a car are stronger due to a larger pinion gear shaft. As for it being no good, I disagree. That is like the blanket statement the 9" Fords are superior. Last year for trucks was 1981. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

03-19-2003, 07:52 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	that is strange would'nt you think they would have a stronger pinon in a truck? why should cars be so lucky ...... haven't ran across any car 12 bolts must be why they are so hard to find.....1981 ok.wonder what year was the last for cars????

03-19-2003, 07:58 PM	#4
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	CAR REARS DON'T INTERCHANGE WITH TRUCKS. The last year for cars was like 1971 then all GM went to corporate 10 bolt 8.5". gotta watch around the 69-70 era as all the gm makes had their own unique 12 bolts. chevys being most popular of course. best place to look for one under a truck from 78-81 is a diesel and there are plenty of dead ones in the bone yards. DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

03-19-2003, 08:31 PM	#5
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	Nothing wrong with that truck 12 bolt. Use it. Unless your putting 900 HP through it at the track every week __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

03-19-2003, 08:41 PM	#6
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	well thats what i got under my truck ,,,it will be something to lookout for with this new engine 850h.p. guess i will have to stay away from the track...very sticky.... Last edited by rage'nrat638; 03-19-2003 at 08:53 PM.

03-19-2003, 09:48 PM	#7
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	I won an auction for a 12 bolt truck rear(drum to drum) on Ebay. It should be here any day. I bid $100 and was the only bidder. I can't believe how affordable the the eaton posi and gear sets are, can't wait to build it! __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

03-19-2003, 10:06 PM	#8
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	airmale , keep my email and phone number around ( see ad for 84 front clip in NJ ) I hate to tell you this now but I would have sold you a 12 bolt for that and no freight charges .I live an 75 minutes from you. I also have a friend with place in Margate that I visit several times during summer months. DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

03-19-2003, 10:09 PM	#9
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	thats great well the other day i was at a steel mfg. that owned a auto shop next door and the guy died... working on there doors (thats what i do if no one figured out by now) and there was one old rear end laying out back so i went and flipped up and sure as hell it a 12 bolt i ask if i could have it they said (its all yours) i picked ot up all by my self and put it in my van before the guy went out the door i was so happy. the one in my truck i have beat it-up preaty good .its work great so you can understand why i stood there with my mouth open when that guy started bad mouthing truck rearends mine has 33 spline moser axels richmonstreet 4.11 gears billet rear caps and alum T/A rear cover w/ adjusters and c-clip elininators. let me know how it goes........MARK Last edited by rage'nrat638; 03-19-2003 at 10:23 PM.

03-19-2003, 10:10 PM	#10
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	A couple days late....I grew up in margate, small world! __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

03-19-2003, 10:25 PM	#11
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	keep posting hay look at the brite side your almost at 100 post keep posting....

03-19-2003, 10:28 PM	#12
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	what do I win? __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

03-19-2003, 10:45 PM	#13
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	your very own custom avatair isnt that special.......i tried to figure it out but sould not i can't even figure out how to get my web site to come up..not mr computer.

03-19-2003, 10:50 PM	#14
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	kewl.....that means I'm not the only knucklehead hear __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

03-19-2003, 10:58 PM	#15
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	hay my wife is a computer analyst and can't figure it out o,boy



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03-19-2003, 11:02 PM	#16
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	hey you two--- get a room :-) . a chat room . L8R. __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

03-20-2003, 12:24 AM	#18
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I looked for 12 bolts when I was at the yard last time. I only went to one yard but I checked em all and then some. No 12 bolts anywhere, I bet they probly had them in the shed up front. Next time Im gonna ask if I can see what they have in the big shed. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

03-20-2003, 04:12 PM	#19
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	Eddie, you didnt find any 12bolts? Give BASELINE AUTO RECYCLERS a call. They rock. I can even stop by there on my way to work one day and pick one up for ya if you go with them. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

03-20-2003, 04:18 PM	#20
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	hard to find the one i narrowed fur under my truck now ....i got when i went to penn. to my wifes mom&dads house the kids got to sit on it all the way back to il. but i got it ........ tryed around here they laughed. and said no... i did find one from a 66 impala but he wanted $500.00 i said no thanks... the one from penn. cost me $150.00 i only used the housing... good luck.....MARK

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