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Author Topic: ring and pinion date code  (Read 341 times)
janobyte
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1968 z/28

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« on: July 05, 2014, 08:23:13 PM »

Where are the date codes located ? End of the part number ? eg: 2 68 ? 
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ZLP955
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« Reply #1 on: July 05, 2014, 10:45:51 PM »

Not sure on pinions, but the ring gear usually has part number, ratio (xx yy), and date code (m/mm, yy).
Here's an example from chevellestuff.net:
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Tim - 04A VN '69 z/28 69-69 715 ex-E/MP
janobyte
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« Reply #2 on: July 05, 2014, 11:07:35 PM »

mine are coming out (ring gear)    10  41 2 68 ,I know they are the gears the car shipped with ,just trying to break the code, assuming should coincide with rear end housing build date.

pinion stampings are pronounced  I see  what can be interpreted as 4:10 and 68, not sure of the month and digit order as it relates to.

Pretty cool ,still have the box the 4:88's came in 69 (Milad's) when #2 owner ordered them...4:10's have been in it ever since.
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bcmiller
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« Reply #3 on: July 05, 2014, 11:31:55 PM »

mine are coming out (ring gear)    10  41 2 68 ,I know they are the gears the car shipped with ,just trying to break the code, assuming should coincide with rear end housing build date.

pinion stampings are pronounced  I see  what can be interpreted as 4:10 and 68, not sure of the month and digit order as it relates to.

Pretty cool ,still have the box the 4:88's came in 69 (Milad's) when #2 owner ordered them...4:10's have been in it ever since.

Your ring gear is dated February of 1968.  

On pinions, sometimes the month is a bit off from the year.  See this attached example.  1 69 on this one.
« Last Edit: July 06, 2014, 08:18:30 AM by bcmiller » Logged

1968 Camaro SS - now 468 BBC, M21, 12 bolt.
Bryon
janobyte
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« Reply #4 on: July 06, 2014, 06:57:53 AM »

thanks
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bcmiller
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« Reply #5 on: July 06, 2014, 08:02:22 AM »

And here is another pinion that was paired with a 3 of 69 ring gear.  Honestly I am not sure if this pinion is dated 2 of 69 or 4 of 69.

Dates on the ring gear are normally very easy to determine.   Smiley
« Last Edit: July 06, 2014, 08:19:23 AM by bcmiller » Logged

1968 Camaro SS - now 468 BBC, M21, 12 bolt.
Bryon
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