Author Topic: "Peening" on late production 69 axle codes  (Read 13824 times)

69Z28-RS

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Re: "Peening" on late production 69 axle codes
« Reply #30 on: January 06, 2020, 04:40:12 PM »
Thanks Ed,   that's an interesting piece of information...  I need to check my August build '69 and see what it is...  :)   So the implication from that comment is that ALL of the late '69 Corvettes were shipped with the '70 diff codes...   

That leaves the Norwood Camaro plant as the only other assembly plant  with the quandary, and that plant was apparently inconsistent on how they addressed the discrepancy.. 

I really think we need to add the 'car production date' to the data listing for these late '69 Camaro differentials to narrow in on the dates which distinguishes the dates for how Norwood assembly  handled that discrepancy.

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luv2sixty9

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Re: "Peening" on late production 69 axle codes
« Reply #31 on: January 06, 2020, 10:37:08 PM »
It should also probably be documented if the housing is an 860 or later 341 housing
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KurtS

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Re: "Peening" on late production 69 axle codes
« Reply #32 on: January 07, 2020, 08:18:05 AM »
You guys have more data points/info that we readers do,
Can we expand the data listing we have by listing the VIN or date of the car the rear end came from?   
I listed all the info I have. A couple of new cars have shown up since - discussed on the site and added below.
It would be a whole lot of work for me to attach build dates to that data.  And several are not tied to cars.

not peened
CBA0804
CBS0805
CBL0806
CBS0820
CBL0812
CBU0819
CBQ0821
CBA0827
CBU0828
CBU0828
CBU0829  09C
CBT0902
CBU0915
CBU0918
CBU0918
CBT0922
CBT0924
CBS0926
CBM0928
CPI1003
CBU1007
CBU1008
CBU1009
CBT1013
CBR1015
CBT1021
CBM1022
CBM1028

peened
CBU0818
CBU0818
CBU0827
CBU0829  09C
CBU0829  09C
CBS0829  09C
CBU0910
CBU0922
CBE0922  09E
CBU0929
CBU1003
CBU1006
CBU1017
CBU1017
CBU1022
CBU1028  10E
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69Z28-RS

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Re: "Peening" on late production 69 axle codes
« Reply #33 on: January 07, 2020, 12:40:02 PM »
That's the first time I've seen the data you have in 'that format', and it is surprising that there's not much we can determine from it re 'timeframe'...  some put into cars the same week with and without the peening.  Maybe all we can determine is that 'some were' .. and 'some weren't'..  and we're not going to get any further information unless some old fella who was working in the Norwood plant comes forth and says 'I did it'... :)

Thanks for collating the information~   
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67CruiseMaster

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Re: "Peening" on late production 69 axle codes
« Reply #34 on: January 07, 2020, 01:41:01 PM »
Maybe one shift was doing it and one wasn't. my .02cents
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BULLITT65

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Re: "Peening" on late production 69 axle codes
« Reply #35 on: January 08, 2020, 03:53:36 AM »
Maybe one shift was doing it and one wasn't. my .02cents
That was my thought. I have noticed other rear end stamp discrepancies and those lined up to be from the same shift.
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KurtS

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Re: "Peening" on late production 69 axle codes
« Reply #36 on: January 08, 2020, 04:59:27 AM »
That's the first time I've seen the data you have in 'that format',
That data has been in this thread since 9/27/2018. http://www.camaros.org/forum/index.php?topic=16781.msg153462#msg153462
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bcmiller

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Re: "Peening" on late production 69 axle codes
« Reply #37 on: January 08, 2020, 05:34:13 AM »
It is not the same shift. I verified that.

When you get right down to it - it doesn't really matter WHY these have been peened. What matters is that all documentation that has been found so far indicates that the C should be there.

Little sidebar for you.
I am a shift supervisor in my 23rd year.  No not for an axle plant or for a vehicle assembly plant, but for an outfit that produces products every day. These products are to be produced in a specific format. If inconsistencies develop from one shift to the next, those are addressed immediately. That means in a day or two, typically at shift change. If it can't be handled that way, then higher level management is brought in and it is fixed in less than a week. If another shift is making work for me, by producing products out of tolerance or format, that doesn't make me happy.

Let's say though that in this axle case that someone continues to put an extra C stamped on something that I don't think belongs there. If it keeps happening, I am going to develop a tool for a "one and done" fix to get rid of that C. What we have seen in these peened cases are multiple strikes and not using the same tool. For a production line, that doesn't make sense. Consistency is important and time is money. I don't think it happened at the axle plant.

It also does not make sense that it happened with vehicle assembly. Axles were labeled with tags on the end of the brake drums or in other ways. It was not necessary to look at the stamping on components as cars were being put together.

This anomaly went on from about mid August through the end of 69 model year production - about 2 months. In the real world, it does not make sense.

I might ask JohnZ what he thinks about this topic.
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ZLP955

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Re: "Peening" on late production 69 axle codes
« Reply #38 on: January 08, 2020, 10:37:05 AM »
It also does not make sense that it happened with vehicle assembly. It was not necessary to look at the stamping on components as cars were being put together.
Somebody on the line had to read the stamped axle code to transfer that info onto the Protect-o-plate. I mentioned the PoP earlier and Darrell confirmed late production PoPs don't show the additional 'C' seen after August. The CRG PoP decode article mentions that only a certain number of characters were used for each drivetrain field. 7 for rear axle code, beginning with 2-letter prefix. Maybe this is pertinent?
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bcmiller

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Re: "Peening" on late production 69 axle codes
« Reply #39 on: January 08, 2020, 12:13:42 PM »
It also does not make sense that it happened with vehicle assembly. It was not necessary to look at the stamping on components as cars were being put together.
Somebody on the line had to read the stamped axle code to transfer that info onto the Protect-o-plate. I mentioned the PoP earlier and Darrell confirmed late production PoPs don't show the additional 'C' seen after August. The CRG PoP decode article mentions that only a certain number of characters were used for each drivetrain field. 7 for rear axle code, beginning with 2-letter prefix. Maybe this is pertinent?

Possibly.
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67CruiseMaster

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Re: "Peening" on late production 69 axle codes
« Reply #40 on: January 08, 2020, 01:23:44 PM »
I think it had a lot to do with the extra time for the 69 model run since 1970 models came out late.
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bcmiller

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Re: "Peening" on late production 69 axle codes
« Reply #41 on: January 08, 2020, 03:04:44 PM »
I think it had a lot to do with the extra time for the 69 model run since 1970 models came out late.

Here is the thread with background information on the topic. This thread morphed/split out of that one.
http://www.camaros.org/forum/index.php?topic=10375.0
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016