CRG Discussion Forum

Camaro Research Group Discussion => Originality => Topic started by: mopar346 on January 28, 2011, 02:46:50 AM

Title: 67 12 bolt posi
Post by: mopar346 on January 28, 2011, 02:46:50 AM
I scored a 67 (i believe) 12 bolt posi at the Turkey rod run this year for $200. My question is, is it rare enough that I would be better off selling it and buying a 69 housing or offering it up for trade for a 69 unit. I know that I can change the spring perches and run it with no issue (after rebuild of course) and I don't really care about dates but many do. I just have enough respect for a rare or hard to find date code that I would hate to use it where it doesn't matter if it is a rare housing. Not looking to make a profit just end up with a 12 bolt. So what do ya'll think, is it rare or hard to find?
Title: Re: 67 12 bolt posi
Post by: william on January 28, 2011, 03:04:23 AM
67 Camaro 12 bolt axles are hard to find. Many are getting modified for early Novas. If it is a posi with 3:55, 3:73 or lower gears it is valuable. Does it have the T-bar bracket?

Nothing wrong with making a few bucks on it to get into a '69 axle.
Title: Re: 67 12 bolt posi
Post by: KurtS on January 28, 2011, 03:46:56 AM
Pics - http://www.camaros.org/radiusrod.shtml
Title: Re: 67 12 bolt posi
Post by: mopar346 on January 28, 2011, 03:49:07 AM
I believe it is a 2.73 gear which is no big deal to me as it needs to be built anyway. The carrier is not diiferent is it? I don't believe it has the traction bar bracket if that is what you are referring to, but I can double check when I get home. Passenger side lower slightly forward location? Got a picture?
Title: Re: 67 12 bolt posi
Post by: mopar346 on January 28, 2011, 03:50:25 AM
That's pretty good, you posted the picture before I ask.
Title: Re: 67 12 bolt posi
Post by: mopar346 on January 28, 2011, 03:53:29 AM
No offense but Chevys are so dull with their all black suspension.  ;D
Title: Re: 67 12 bolt posi
Post by: tom on January 28, 2011, 05:43:13 AM
I think there were 3 different carriers, and the 2.73 carrier was not compatable with the more desireable high performance ratios. Of course if I'm wrong, someone will post the truth
Title: Re: 67 12 bolt posi
Post by: mopar346 on January 30, 2011, 12:41:37 AM
It doesn't have the traction bar bracket but it appears on quick inspection it may have had something welded to it at one time. I will check further tomorrow, I will also check the gears again. Where are the date codes on the housing I will double check that as well.
Title: Re: 67 12 bolt posi
Post by: Gramps69Z on January 30, 2011, 12:51:27 AM
http://www.camaros.org/drivetrain.shtml#axle

http://www.camaros.org/drivetrain.shtml#AxleCodes
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 04, 2011, 06:55:34 PM
Axle code is BY 0914 G2

BY        68 only 2.73 12 bolt posi
09        Semtember
14        14th
G         Detriot
2          2nd shift

Correct?
Title: Re: 67 12 bolt posi
Post by: bertfam on February 04, 2011, 07:25:06 PM
Quote
Axle code is BY 0914 G2

BY        68 only 2.73 12 bolt posi
09        Semtember
14        14th
G         Detriot
2          2nd shift

Correct?

You are correct.

Ed
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 04, 2011, 08:25:19 PM
Thanks. So it was for a 68 model year. Who in their right mind or what package would have had a 2.73 with a posi no less? Just don't make sense the way I think. If I understood an earlier post the carrier is pretty much useless since it wont hold a steep gear. Is there a spacer available and if so how reliable/durable are they?
Title: Re: 67 12 bolt posi
Post by: bertfam on February 04, 2011, 08:55:32 PM
The 2.73 could be had with just about any engine if you pressed hard enough, but typically, the "economy ratios" of the L30, L48, L35 and L34 engines had the 2.73 available. Heck, with a few engines you could even get a 2.56 ratio!

Ed
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 04, 2011, 09:00:00 PM
What all gears will fit the carrier?
Title: Re: 67 12 bolt posi
Post by: bertfam on February 04, 2011, 09:20:18 PM
The 2 series carrier will support the 2.29 (1969 full size cars), 2.56 and 2.73.

Ed
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 04, 2011, 09:24:07 PM
Thank you.
Title: Re: 67 12 bolt posi
Post by: KurtS on February 05, 2011, 02:56:17 AM
But you're correct, there's adapters to convert them to a 3-series.
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 05, 2011, 02:59:16 AM
And a series 3 is good for what gears? Is the adaptor strong enough to handle serious abuse? 4-500 hp and slicks at times.
Title: Re: 67 12 bolt posi
Post by: JohnZ on February 05, 2011, 03:22:26 PM
And a series 3 is good for what gears?

A 3-series carrier is for gears up to a 3.90:1; 4.10 and up requires a 4-series carrier.
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 06, 2011, 05:12:21 AM
Thank you.
Title: Re: 67 12 bolt posi
Post by: tmodel66 on February 06, 2011, 04:44:14 PM
I have a 3 series carrier with a spacer ring and GM 456 gears. Came out of my L48 when I put in my new 342 "street gears". I don't know if the spacer ring of this type would work in your housing. My POP says my car came with 331 gears and I assume the gears were changed at the dealer when delivery took place?
Title: Re: 67 12 bolt posi
Post by: mopar346 on February 06, 2011, 08:23:47 PM
I can PM you if you are interested in getting rid of it.