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Transmission & Driveline Transmissions and Differentials

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  #1  
Old Apr 21st, 09, 05:36 PM
beachwalker beachwalker is offline

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Default 68 Rear end swap

Hi everyone. I am looking for a rear end to replace my 3.08 non posi, mono leaf axle on my 68 convert. I want to get a 3.55 posi multi leaf 10 bolt. If i cant find one out of a camaro, what are some other makes i can look for. I have heard that some novas are a good choice. Can anybody give me some other makes and years i can look for. Thanks for any help.
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  #2  
Old Apr 21st, 09, 05:53 PM
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Default Re: 68 Rear end swap

'68 - '79 Nova will bolt right in. '68-'71 used 8.2 10-bolts and 12-bolts. '72-'75 was 8.5" 10-bolts. And '76-'79 they use 7.5's and 8.5's. Just be careful what rear and year and you'll be set. At Pic-N-Pulls you can find a nice core 8.5 10-bolt for under $100 and you can pull a posi carrier out of a truck and then all you need is a bearing kit and someone that can put it all together properly.
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  #3  
Old Apr 21st, 09, 06:02 PM
DOUG G DOUG G is offline
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Default Re: 68 Rear end swap

68-74 (and some 75-79) 8.2,8.5,or 12 bolt (you don't want the 7.5) Good hunting.
Nova
Omega
<S>Valiant</S> Ventura
Apollo

http://www.novaresource.org/axle.htm <--can help determin whats what by looks and numbers. Lots of info
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Last edited by DOUG G; Apr 21st, 09 at 06:24 PM.
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  #4  
Old Apr 21st, 09, 06:04 PM
john68 john68 is offline
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Default Re: 68 Rear end swap

VALIANT?? Do you mean Ventura, made by Pontiac?
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  #5  
Old Apr 21st, 09, 06:09 PM
DOUG G DOUG G is offline
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Default Re: 68 Rear end swap

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Originally Posted by john68 View Post
VALIANT?? Do you mean Ventura, made by Pontiac?
yes ! I knew I was wrong and was just looking to fix....
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68 Camaro~LSx
1.546 60'
7.132 @ 94.43 660'
11.327 @ 116.79.
Best to Date....
RedЯum <-Pics
http://www.youtube.com/watch?v=Of8WV...ature=youtu.be <~More here
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  #6  
Old Apr 21st, 09, 07:03 PM
big gear head big gear head is offline
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Default Re: 68 Rear end swap

I have 2 of these 8.5 rear ends. I can build one for you or sell you one as is. I don't know what is in them right now, but it doesn't matter becasue they need to be completely rebuilt with new parts.
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  #7  
Old Apr 22nd, 09, 03:30 AM
beachwalker beachwalker is offline

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Default Re: 68 Rear end swap

Thanks everyone for the help. I should be able to find one around atlanta somewhere.
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  #8  
Old Apr 22nd, 09, 11:20 AM
zman1969 zman1969 is offline
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Default Re: 68 Rear end swap

Quote:
Originally Posted by DjD View Post
'68 - '79 Nova will bolt right in. '68-'71 used 8.2 10-bolts and 12-bolts. '72-'75 was 8.5" 10-bolts. And '76-'79 they use 7.5's and 8.5's. Just be careful what rear and year and you'll be set. At Pic-N-Pulls you can find a nice core 8.5 10-bolt for under $100 and you can pull a posi carrier out of a truck and then all you need is a bearing kit and someone that can put it all together properly.
UHH DONT use the truck carrier or Gov-Lock posi (it will work but breaks easy) find the passenger version eaton OE posi - common like the old Trans am used 73-81
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  #9  
Old Apr 22nd, 09, 11:57 AM
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Default Re: 68 Rear end swap

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Originally Posted by zman1969 View Post
UHH DONT use the truck carrier or Gov-Lock posi (it will work but breaks easy) find the passenger version eaton OE posi - common like the old Trans am used 73-81
I said posi and wasn't refering to a gov-lock which is a locking diff. Good point though, the one I pulled from a Chevy truck looked like this and is not a gov-lock...

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  #10  
Old Apr 22nd, 09, 02:14 PM
zman1969 zman1969 is offline
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Default Re: 68 Rear end swap

well i cant view the pic at work only trucks I've found w/o a gov lock posi had been rebuilt woth like an auburn unit. most all trucks came with gov locks from factory from what I've seen - I have torn down dozens of them btw. just dont want him to use a gov lock was my point- they are nicknamed Gov-Pops cause they do explode!
(sweet looking nova and ss/rs camaro!)Dennis
__________________
69 R/S Z/28 302 4.10 X33 D80 late 09C
69 T/A clonification LS6-6speed under construction
69 Nova SS retirement project
99 Firehawk
64 Chevelle wagon 6.0l planned sons toy
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  #11  
Old Apr 22nd, 09, 02:31 PM
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Default Re: 68 Rear end swap

Quote:
Originally Posted by zman1969 View Post
well i cant view the pic at work only trucks I've found w/o a gov lock posi had been rebuilt woth like an auburn unit. most all trucks came with gov locks from factory from what I've seen - I have torn down dozens of them btw. just dont want him to use a gov lock was my point- they are nicknamed Gov-Pops cause they do explode!
(sweet looking nova and ss/rs camaro!)Dennis
Thanks for the complements on the cars... I don't recall the years but we must have pulled the covers off 6 differentials looking for lower gears, settled for 3.08's but all the trucks had carriers just like this one. Since you can't see it, it's a std GM posi with the big steel S spring that puts pressure on the clutches.
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  #12  
Old Apr 23rd, 09, 07:43 AM
zman1969 zman1969 is offline
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Default Re: 68 Rear end swap

Quote:
Originally Posted by DjD View Post
Thanks for the complements on the cars... I don't recall the years but we must have pulled the covers off 6 differentials looking for lower gears, settled for 3.08's but all the trucks had carriers just like this one. Since you can't see it, it's a std GM posi with the big steel S spring that puts pressure on the clutches.
I have NEVER found one of those S spring posis in a truck and I bet I've torn 75-100 or more of them apart! 4x4 usually have lower gears 3.42 are real common 3.73's fairly common and rarely you find 4.10's - usually in the front diff -the gears are the same on the solid axle-87 and older p/u and 91 and older suburbans and the nice thing about taking the front sets as theyre usually like new - but its a PITA to get the axles out -locking hubs,bearings,rotors and all. sorry not to hijack the thread but if your lucky you can find all the parts you need at a pick and pull yard -gears and posi's and put it in the nova housing and get out for 100 bucks or less (I have a 18v impact that I take)and you will be wore out and dirty but then you have cleanup time and finding a old wrench that can put it together for you for a song compared to a9in or 12 bolt hope this helps you out some!
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69 R/S Z/28 302 4.10 X33 D80 late 09C
69 T/A clonification LS6-6speed under construction
69 Nova SS retirement project
99 Firehawk
64 Chevelle wagon 6.0l planned sons toy
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