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Author Topic: Trans date vs. engine date code  (Read 5980 times)
smith69z
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« on: December 03, 2008, 01:25:50 PM »

What is the normal range for a dated block vs. dated mincie? If your car is a 3E, block code 0320 what would the correct range of dates for a trans be? Second week in March?
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JohnZ
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« Reply #1 on: December 03, 2008, 02:33:25 PM »

The engine date doesn't enter into it - the transmission was installed at the car assembly plant. Transmissions are typically dated 2-4 weeks prior to the car's final assembly date.
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'69 Z/28
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smith69z
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« Reply #2 on: December 03, 2008, 05:00:09 PM »

Thanks John. The reason for my question is that I have been contacted by the person who sold me my original engine that my trans is now available. When I bought the block he said he knew who had the tramns but didn't want to sell. So I want to make sure everything is on the up and up with the dates.
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rich69rs
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« Reply #3 on: December 03, 2008, 06:59:56 PM »

As JohnZ said - "typically 2-4 weeks"

Powerglide in my '69RS is original to the car and has the partial VIN stamped on it.  The date code stamped on the pan is C9A16N; i.e. built in Cleveland on Jan 16,1969 during the night shift. 

As close as I can estimate it, my car went through final assembly at Norwood on or very close to Monday, 20 January 1969.....which means that the tranny was finished in Cleveland during the night shift on Thursday, 16 January 1969; was shipped to Norwood and installed in my car within a 4-5 calendar day time frame.
« Last Edit: December 03, 2008, 07:12:05 PM by rich69rs » Logged

Richard Thomas
1969 RS
jl8dale
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« Reply #4 on: December 03, 2008, 09:25:35 PM »

I have a documented LA Z/28 with the exact same date on the trans, rear axle, and front pad stamping.

Has anybody seen this before?
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1969 Z/28 Daytona Yellow/Yellow Houndstooth, Tilt, Fold Down Seat, - POP
1969 Pace Car Original & Highly Optioned - Chassis Broadcast Sheet
KurtS
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« Reply #5 on: December 03, 2008, 11:38:48 PM »

I have a documented LA Z/28 with the exact same date on the trans, rear axle, and front pad stamping.

Has anybody seen this before?
Yes. Not uncommon on base V8 auto cars, not real common on a Z.
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Kurt S
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« Reply #6 on: December 04, 2008, 02:48:33 PM »

My original Norwood Z28/RS...    09C (1969) date...
Engine     V0827DZ       27Aug69  (cast on 26Aug69)
Trans       P9H30A        30Aug69   (Muncie M20)
Diff          BU0829G1     29Aug69   
Alternator   9H25          25Aug69
4053 carb     982          midAug69
Distributor     9E16        16May69
Rallye Wheels   K1 9  5 20    20 May 69
Fan            H69               **
Fan Clutch   H21J             **

I'm not positive on how to decode the fan/cluch dates..   

What other codes/dates should I be documenting on my car?

I'd like to try having it judged in the 'Original Unrestored' class next year.    What is the best show to do so?   What is involved in getting it registered?   Should I remove the ceramic headers, Mallory Rev Pol dist, and Judson Electron magneto, and put back the original distributor, coil, and exhauist manifolds?  (I don't have the smog system)..
« Last Edit: December 04, 2008, 02:58:41 PM by 69Z28-RS » Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
zbo2
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« Reply #7 on: December 26, 2008, 01:25:21 AM »

i think the trans date is june 30 not august 30......H=June on the trans, anyhow, my fan is F69 and my build is 07A so H69 could be august as well as the fan clutch
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Jerry@CHP
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« Reply #8 on: December 26, 2008, 09:25:42 AM »

There are many P9H30A, B or C transmissions.  I have rebuilt many and the B/D range on the cars spans to August of 1969.

Jerry
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john302
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« Reply #9 on: December 26, 2008, 05:50:21 PM »

I looked at this car in person,about three years ago.I am the one who took the heads off the block and removed the intake for the very first time! Everything is original 100percent . Kurt knows about this car also. Yellow/yellow  flat hood, rear end housing rusty,dent in right front fender, two brother in Walla Walla purchased it new. The reason the rear end was toast because the muffler rubbed a hole in the cover. call me or email I would like to talk to you about this car. John
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KurtS
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« Reply #10 on: December 29, 2008, 12:48:03 AM »

Trans       P9H30A        30Aug69   (Muncie M20)
i think the trans date is june 30 not august 30......H=June on the trans
Good catch. H is June for transmissions.
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Kurt S
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« Reply #11 on: January 14, 2009, 02:37:48 PM »

Hmmmmm....    that is interesting to me, and something I didn't know.. Smiley      Why is H for June for transmissions?
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
1968RSZ28
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« Reply #12 on: January 14, 2009, 02:53:39 PM »

Why is H for June for transmissions?

Because that is how the transmission assembly plant coded them.  Read this...  http://www.camaros.org/drivetrain.shtml#TransmissionNumbers

Paul
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69Z28-RS
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« Reply #13 on: January 15, 2009, 03:56:48 PM »

Thanks Paul...  I just read it..        *G*  ..  but it still defies logic..  *L*

Those Transmission production people were worse on their alphabet than my 2 yr old grandon..  *L*.  they totally lost their F and G.... 
it's also interesting to me that the CRG report says that the year is for the MODEL year, not the calender year, and yet they only provide Jan thru Dec codes (and skip F and G for some unfathomable reason)...   soo taking all the CRG information as it stands, it seems that a Muncie transmission produced in August '68, and one in August '69 (both for 1969 model year production..  would have EXACTLY the same stamping...  (which defies all logic associated with manufacturing processes)...  so I think something is missing here....Huh?
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
KurtS
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« Reply #14 on: January 16, 2009, 12:51:13 AM »

Nothing wrong with your logic. Yes, it was model year and, yes, I've seen trans with exactly the same dates, but a year apart. A 69 Camaro dating anonomaly.
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Kurt S
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