Author Topic: Earliest 3969341 and Latest 3894860 axles  (Read 89837 times)

ko-lek-tor

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #165 on: October 28, 2016, 04:11:34 AM »
Just drug this out of a barn in Indiana this afternoon. The "C" has been peened over, guessing at the factory. This axle has never had the numbers area cleaned off till I bought it. Will get a better pic of Cast Date tomorrow. Looks like F119 (June 11th)?

Do the guts match the code?  What are the dates of the ring and pinion?

Sorry, no guts. Just a housing, backing plates and cover. There were 3 more 1st gen 12 bolt housings in the back of the barn, 1 NOS! a fiberglass 69 front "doghouse" out back and several sets of BB heads and headers of unknown engine type inside. It was dark and cob webs everywhere. I came out with the housing , set of 026 square port heads and a pair of 69 Camaro buckets and of course, my rust free trunk lid. Next stop yielded a Victor 2-R tunnel ram, 2 660 holleys a 4346 holley, a oval port strip dominator and a bunch of other stuff...I'm broke! A lot of fun treasure hunting though.
James to strangers, Bentley to friends
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79(sold)
1969 307 4spd. coupe Daytona Yellow 711 bought in 85

bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #166 on: October 28, 2016, 01:55:40 PM »
Ah, OK Bentley.  I am sending you a PM.
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

KurtS

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #167 on: November 08, 2016, 03:36:39 PM »
I went through my axle pics. There are several CBU axles with the C wiped out. Several are also untouched. I don't see the C removed on any other ratio.
I won't even hypothesize on this one......
Kurt S
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bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #168 on: August 08, 2018, 02:26:49 PM »
Another piece of data.

860 housing
Casting date D28 9
BE0708G1
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #169 on: August 13, 2018, 01:03:28 AM »
Updated August 12, 2018

Remember when submitting data - put all of the information requested in ONE POST - PLEASE.

Some notations have been made for C BU axles where the C has been peened. I did not note this on all of the ones listed.

Here is what we have so far.  We need more data points for axle assembly dates between early June and early August.  My apologies if your data was inadvertently missed.

It appears that the 341 casting number started being used in June. It appears that the 3 letter code had started by early August, possibly earlier. 

Remember that there was a shutdown for the latter part of July and into very early August. 

01C
BM 0124G1
860, casting date A 21 9

06A - 9N665238
BM 0625G
860, casting date unknown

07A - 9N6687XX
BU 0630G2
860, casting date E 26 9

Unknown build date
BE 0708G1
860, casting date D 28 9

08E  9N677954
C BS 0805G
341, casting date G 25 9

08C
C BL 0806G1
341, casting date G 23 9

Unknown build week and/or VIN
C BM 0807G1
860, casting date F 24 9

Unknown
No assembly stamp, possible warranty axle
341, casting date F 28 9

08D  9N6745xx
C BU 0818G2
unknown casting number or date

08D
C BS 0820G2
341, casting date H 11 9

08E, 9N677163
C BL 0812G2
341, casting date H 5 9

08E
C BU 0828G2
341, casting date H 13 9

08E
C BU 0828G2
341, unknown casting date

09A - 9N680789
C BU 0828   
341, unknown casting date

09A
C BU 0826 or 0828
unknown casting number or date

09C
C BU 0829G1
341, casting date G 31 9

Unknown build week and/or VIN
C BS 0829G1
341, casting date H 17 9

09C 9N684457
C BU 0829G1
341, unknown

09C   9N685397
C BU 0910G1
341, casting date I 2 9

Unknown build week and/or VIN
C BU 0916        C area is peened
341, casting date I 6 9

Unknown build week and/or VIN
C BU 0922G2    C area is peened
341, casting date I 11 9

10A
C BU 0929G1    C area is peened.
341,

Unknown build week and/or VIN
C BS 1028G1
341, casting date J 3 9
« Last Edit: August 14, 2018, 02:21:07 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Kelley W King

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #170 on: August 14, 2018, 11:26:05 AM »
Bryon, I don,t think I gave you my 08E. I will try and get it to you in a day or so.
69 Z28 RS Scuncio Hi Performance
69 SS L78
67 SS Chevelle
64 Corvette
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ko-lek-tor

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #171 on: August 14, 2018, 12:02:10 PM »
... The "C" has been peened over, guessing at the factory...
I went through my axle pics. There are several CBU axles with the C wiped out. Several are also untouched. I don't see the C removed on any other ratio.
I won't even hypothesize on this one......

Rereading my own post I felt I was vague in saying, “done at the factory.”. The point I was trying to convey is that I have only known Camaro housings that had the “C” peened. I am under the belief that it was done at Norwood Assembly , as a Supervisor directive, and not done on axles dated the same at, say, the Nova Assembly line. I have been under the opinion that this peened “C” is a confirmation that the housing came out of a Camaro. Not to hijack this thread’s original topic, but it would be interesting to research this aspect of these C-less housings in the future. Further, Kurt’s observance of only the BU housings being affected, which I had not heard previously, is intriguing data to research, as well.
James to strangers, Bentley to friends
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79(sold)
1969 307 4spd. coupe Daytona Yellow 711 bought in 85

69Z28-RS

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #172 on: August 14, 2018, 01:30:54 PM »
I'm guessing that *most* of the transition differential information sent by members here were from Z28 models, so maybe a preponderance of BU information as compared to other gears...?
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #173 on: August 14, 2018, 04:15:54 PM »
Gary, for this thread - YES.  BUT, I have hundreds of axle stamp pics and only some of the C BU stamps have been peened.  No other ratio is like this.  And last I checked, the pics that Kurt had showed the same thing.  He has a LOT more pics than I do.  I have not posted all of my axle data, because it is not complete with casting number and casting date.  A lot of the photos only have the assembly date.

Now I will tell you that YES, maybe SOME of these "peened" C stamps could have been caused inadvertently by rocks, road debris, etc.  - but not all.  And if the axle plant or assembly plant was going to do it, then it most likely would have been X'd out.  That is how other drivetrain components are handled.

I have no proof, but I strongly feel this was done intentionally by owners.  The axle code is one of the things strongly looked at when you are considering purchase of a Z28. 

I will leave this thread open to more discussion on the C - no need to start a new topic.  But let's not let it get out of hand.  Let's keep it factual and not get riddled with everyone's opinion. 

Thanks!
« Last Edit: August 14, 2018, 08:51:50 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

BULLITT65

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #174 on: August 14, 2018, 09:12:22 PM »
So would that mean when Gary got his 69 Z, that the woman who owned it or her father got under the car and struck where the C would have been?

Have guys tried to fudge the numbers on rear ends? Yep,
 
Bryon while you state you knew what to look for in junkyards, I think you and your dad were some of the few that would have been aware, of rear end codes, and I think the knowledge base of junkyard crawlers is much different (deeper) than the masses who purchased these cars over the years.
1969 garnet red Z/28 46k mile unrestored X77
-Looking for 3192477 (front) spiral shocks 3192851 (rear)
-Looking for an original LOF soft ray windshield
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bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #175 on: August 15, 2018, 12:57:17 AM »
Back then this was not common knowledge to average gear head.  But if you were into racing and wanted to know what ratio you were getting - this was how it was done.

Obviously I have no way of proving what I think, but the evidence does support my thinking.  See my previous post as to why.
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

69Z28-RS

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #176 on: August 15, 2018, 02:59:57 AM »
I still disagree with Byron re various/sundry owners 'peening' out the C in much the same way all across the country.. Unless it was some kind of 'Let's Obliterate the C'  underground conspiracy!  :)    BUT...  you say you have HUNDREDS of examples - maybe if you compile the DATES, CODES, etc .. along with peened or not peened (or photos?), then I might come to agree with you, but in lieu of that....   I cannot believe such an 'aligned' conspiracy existed!

When I first examined my rear, I didn't even notice the 'C' (it was well in front of the 'code' and was not clearly stamped).   I think it was Kurt who suggested it looked like the C was there but damaged (perhaps by a stone or ?); now I would say it appeared like a single 'peen'!   But when we see MANY peened the exact same way, and all of them are in that 'transition period', where they are installing 1970 stamped rears in 1969 cars, I tend to lean towards the factory doing it (to appear more like the thousands of '69s assembled earlier in the year)...

Can you show us your database of '69 transition-period rears to help convince us of your theory?
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bcmiller

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #177 on: August 15, 2018, 03:14:22 AM »
You are saying they are all peened exactly the same way? Let’s see YOUR database that shows it.  8) 

They are not all peened the same way. 

The axle plant just stamped what they were told to do. The vehicle assembly plant people would not have cared. The stamped code is NOT what was used on the assembly line for quick identification.
Typically quick ID was done by a sticker with the axle code on it - stuck on the outside of the brake drum. 

Here is a a link to a reproduction example from HBC.

http://www.heartbeatcitycamaro.com/store/product/24582/1969-Camaro-12-Bolt-COPO-BE-Rear-Axle-ID-Stickers-Pair/


You can disagree with me a thousand times, but it will be as productive as hitting your forehead against the wall.  Show me REAL PROOF otherwise and I will listen.   
« Last Edit: August 15, 2018, 03:58:08 AM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now 468 cubic inch BBC/M21
67 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

69Z28-RS

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #178 on: August 15, 2018, 03:15:35 AM »
I'm going by YOUR database (or OUR database) on the posted photos re this topic here on this site...  They ALL appear to have been peened with the same type tool...
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

Kelley W King

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Re: Earliest 3969341 and Latest 3894860 axles
« Reply #179 on: August 15, 2018, 12:39:06 PM »
Not that I know, but just a thought. Think someone was thinking here are actually 70 model parts slated for 69 cars? Of course if only one ratio kind of makes that ? But I don,t think rocks or whatever did it. Could someone say" this load is going to Norwood and should not have the C" ? Maybe one guy on one shift who was later corrected. Maybe his work station was in the 12 bolt area? Lot of maybes here. I worked on an assembly line in the 70,s for IBM and heard phrases like that part came off 3rd shift because someone installed something differently. Not wrong just different.
69 Z28 RS Scuncio Hi Performance
69 SS L78
67 SS Chevelle
64 Corvette
66 GTO Tiger Gold
77 Trans Am Special Edition