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#1 |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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question about rear ends
a friend of mine has a 12 bolt chevy rear under his 67 chevy long bed.. it was a stock 6 lug pattern he went to the junk yard to get 5 lug axles .. he got them out of a 72.. when he went to put them in he says that they are an inch longer then his stock ones? is this a true statement or does he have something wrong.. i am asking because i have a 10 bolt on my 67 gmc and i want to put a 12 bolt in but dont want a wider one??
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98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#2 |
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Location: SOMERSET KY.
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#3 |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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so i have to find a 67-70 12 bolt rear end then... thank you very much!!!
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98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#4 |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 02-01-2005 at 02:24 PM. |
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#5 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Interesting that you have a 10 bolt....you might want to measure the width...these trucks never came with 10 bolt rears, so there is no telling what you have under there.
The difference between the early verses late is more liek 3/8 inch per side...not one inch. |
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#6 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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I will avoid any potentially embarrasing coments about rear ends. but I will say this, I think the difference can be made up for with different drums. get some measurements & head down to your FRIENDY (patient & knowledgable) parts store. in the book there is listings for part #'s based on these measurements.
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Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card |
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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You can do that by using the 73 & later drums...HOWEVER...
I said this on another forum, and some one pointed out that the bearings would be riding on a section NOT made for bearings, and that could be an issue. He also pointed out that since the bearings would be in further than designed, there would be more leverage on the axle shafts. After that being pointed out to me...I say don't try it. |
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#8 |
Senior Member
Join Date: Apr 2000
Location: Orlando, FL
Posts: 1,076
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I thought that I read before that the 70 rear axle (6lug) is the same length as the 71-72 axles and that they are a direct swap. Anyone?
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............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements. |
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#9 | |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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Quote:
you got me this is the first classic i have touched i have seen the 10 bolts under late model s-10 and blazers.. but i even double check and its a 10 bolt .. and i want something better so if anyone has a 12 bolt laying around i am looking for one to fix up!!!
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98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#10 |
Registered User
Join Date: Nov 2004
Location: Cameron, Oklahoma
Posts: 199
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Axles
I've also heard that the 70 axles are the same length as 71-72, but I don't know for sure. Frank
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#11 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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Are you sure the 10-bolt isn't a Dana 44? I think they have 10 bolts on the cover and came in 67-68 GMC's.
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#12 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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Also, some 1970 12-bolts are the same width as a 71-72 12-bolt and axleshafts will interchange.
I've got a pair of 1972 12-bolt 5-lug axleshafts if anyone wants to buy them....$50. PM me if anyone wants them.
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#13 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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yes, 70 was a chainge over year on the rear end..the early ones were like the older, the later ones were wider like the 71 & up.
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#14 |
Registered User
Join Date: Sep 2004
Location: Palestine TX
Posts: 32
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I am guessing it a Dana 44. It has 10 bolts and that whats under my 68 Chevy w/leafs.
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#15 |
72GMC51
Join Date: Jul 2004
Location: Minnesota
Posts: 233
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According to the hollander interchange the 70 - 72 axels on GM 12 bolts are 31-11/32" long and the 67-69 are 30-1/4".
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72 GMC 2wd 1/2 long 350 700r4 A/C PS PB 4:10. Are they ever really finished ![]() |
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#16 |
Registered User
Join Date: Feb 2003
Location: Mesquite, Tx
Posts: 396
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My '67 GMC has the Dana 44(10 bolt). I've pounded on it pretty good. Hasn't let me down yet. It's an 8.5" ring gear. Not sure what you want to use it for, but it should hold up pretty good. If you can get the truck to hook up, it may be a different story. I've done a couple of blasts with ET streets on mine (knock on wood) no probs yet.
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GM 330HP/350, Magnuson 122HH, Tremec TKO 5spd |
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#17 |
Registered User
Join Date: Dec 2000
Location: Ringtown,PA
Posts: 555
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you looking for 5 lug or 6?
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68 chevy 406 small block, budget drag racer, new best e.t 11.91 @112 67 nova numbers matching 327 4 speed 13.6 @ 102mph 70 longhorn c-30 402/4 speed 70 c-10 swb 402, muncie 4 speed 94 s-10 350/th350 3:73 posi 71 c-20 402/th400 towrig for racetruck. 72 4wd lifted on 35's 72 350/3 speed winter beater |
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#18 |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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5 lug if i can find one but if not i can change a 6 lug do you have one?
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98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#19 | |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Quote:
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#20 |
Registered User
Join Date: Nov 2004
Location: Dover, AR
Posts: 120
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I run the longer axles in my 67 housing, and use the wider drums with no problem.
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was 67 chevy swb fleet now muticolored 69 step, 350/350, 3.73 posi, converted to 5 lug, torq thrust II 17x8 front 17x9.5 rear, factory air cab, fuel cell. future plans: shaved wiper cowl, shave stake pockets, phantom grille, and silver paint... 68 camaro ss396 project 54 f*rd project truck |
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#21 |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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heres my next question ... im going to head to the local junk yards to see if i can find a 12 bolt rearend.. what other trucks can i pull them out of so it will fit in nicely.. im adding a 4 link so mounting hardware wont be a problem.. but length wise.. also how do i know if its posi.. i forget if its .. if you spinn the right wheel forward the left wheel will spin backwards.. is that for posi or not posi?? please help!?!?
__________________
98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#22 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Quote:
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__________________
junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#23 |
Registered User
Join Date: Jun 2004
Location: Reading PA
Posts: 164
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how hard is it to find one of those rear ends? and what will that set me back?
__________________
98% of ALL fords are still on the road today... ![]() ![]() where is the best place to park a ford???.. next to a fire station!!!! ![]() pictures of my new and old trucks! |
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#24 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Quote:
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__________________
junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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