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Author Topic: Rear axal code date  (Read 1661 times)
yankeechaser
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« on: February 27, 2012, 12:57:53 PM »

What is the average date on rear diff. versus build date of trim tag. I have read that engine was 30 days or so. Does trans and rear follow pattern.

Bo
67 RS/SS
68 Z/28
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Bo
68 07B Z/28 Nor Le Mans w/houndstooth, headrests & gauges
67 03C 4N LOS RS/SS 4 speed plum w/gauges
Mike S
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« Reply #1 on: February 27, 2012, 01:18:55 PM »

 Here are my 2 67 rear dates (plus engines):

NOR 5B - 396/MT/3:31 posi - date - 0331 - This is the performance rear option. Lag about 6 weeks. (engine date 0308)
LOS 4B - 396/AT/3:07 non-posi - date - 0404 - This is the standard rear for this base engine option. Lag about 9 days. (engine date 0214 - assembled with love  Smiley )

  I think the gear ratio installed may have an effect on the assembly date of the rear vs. the car.
The standard ratios  should have less of a date lag because they would be used on all cars that didn't have the optional rear ordered, as is the case of my LOS car.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
Mark
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« Reply #2 on: February 27, 2012, 01:22:38 PM »

My 69 3.07 non posi axle is dated 2 days before the car left the plant, so it was actually assembled and shipped to Norwood while my car was on the line.  My car is an 04L built car, that left the assembly line on April 30, 1969 around 10 pm.
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Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
1968RSZ28
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« Reply #3 on: February 27, 2012, 01:59:28 PM »

My 02C Los Angeles built '68 Z/28 has a BU 3.73:1 positraction rear axle that was cast on January 3, 1968 and assembled on January 19, 1968.

Paul
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68Zproject
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« Reply #4 on: February 27, 2012, 02:35:25 PM »

My 05D 68Z has 05-17 on the rear end stamp.  I don't remember the cast date.  The engine ass. was 05-06
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68Z28
x66 714
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« Reply #5 on: February 27, 2012, 05:09:53 PM »

2 1968 z/28s built 02E

Mine BW1220G2 4:56

Another z/28 vin number 13 prior to mine

BX1109G2 4:88

They might have sold more 4:56 orders than 4:88 thus needing to restock more often....Joe
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See America's First, Chevrolet

1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969
srode
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« Reply #6 on: February 27, 2012, 06:19:14 PM »

My 02D Z11 3.07 Non Posi was built late November or early December, don't remember the actual date but its in the ball park.  So it's a significant time before the build of the car.  Don't have any reason to believe it's not the original to the car, I bought it in 84.   
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Steve - 02D Z11 and a Plain Jane hardtop
yankeechaser
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« Reply #7 on: February 27, 2012, 06:48:34 PM »

My 68 z is 07b  rear code BV0316G1 E  engine is V0628mo on pad. CAST E228. It looks like rear diffs. were stretched out more
« Last Edit: February 27, 2012, 07:28:36 PM by yankeechaser » Logged

Bo
68 07B Z/28 Nor Le Mans w/houndstooth, headrests & gauges
67 03C 4N LOS RS/SS 4 speed plum w/gauges
Mike S
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« Reply #8 on: February 27, 2012, 06:59:41 PM »

My 68 z is 07b  rear code BV031G1 E  engine is V0628mo on pad. CAST E228. It looks like rear different were espresso out more.
The date code should be four numbers. Did you leave one out?

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
yankeechaser
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« Reply #9 on: February 27, 2012, 07:24:01 PM »

Yes BV0316G1 E

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Bo
68 07B Z/28 Nor Le Mans w/houndstooth, headrests & gauges
67 03C 4N LOS RS/SS 4 speed plum w/gauges
Mike S
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« Reply #10 on: February 27, 2012, 08:39:45 PM »

My 68 z is 07b  rear code BV0316G1 E  engine is V0628mo on pad. CAST E228. It looks like rear diffs. were stretched out more

Looking at your rear code of being a 4:10, that is certainly a less common ratio option to order, IMO, even back in '68. Your date spread is no worst than Joe's (X66 714) cars that too have steep ratios. I would venture to say yours (and Joe's) are within a very acceptable range.
 As for engine dates vs. cowl dates, I find it interesting how the small block Z's are so close compared to my BB dates (and other BB dates I have seen in the past). I guess it is partially dependent on when the model options 'catches on' to the buying public.

Interesting thread!

Mike

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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
JohnZ
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« Reply #11 on: February 28, 2012, 10:55:26 AM »

My 02D Norwood '69 Z/28 "BV" 4.10 axle was built on February 19th, and the car came off the Final Line on February 27th.

Its birthday (and mine) was yesterday.  Grin
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'69 Z/28
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« Reply #12 on: February 28, 2012, 11:16:54 AM »

Happy belated birthday,,,,Joe
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See America's First, Chevrolet

1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969
1968RSZ28
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« Reply #13 on: February 28, 2012, 12:01:39 PM »

Happy Birthday John!    Smiley

Paul
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68Zproject
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« Reply #14 on: February 28, 2012, 12:05:58 PM »

Herzlichen Glückwunsch zum Geburtstag
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68Z28
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