CRG Discussion Forum

Camaro Research Group Discussion => Decoding/Numbers => Topic started by: Maxsg1973 on November 27, 2019, 06:15:06 AM

Title: Muncie casting numbers on passenger side?
Post by: Maxsg1973 on November 27, 2019, 06:15:06 AM

How do you decipher these numbers? 13 6 ?
(https://i.ibb.co/98yRLR5/F-URa-KDr-T36fw-Fur-Mb2d5g.jpg) (https://ibb.co/NVWwPwB)

Title: Re: Muncie casting numbers on passenger side?
Post by: ZLP955 on November 27, 2019, 09:43:44 AM

Perhaps a mold number?

Title: Re: Muncie casting numbers on passenger side?
Post by: bcmiller on November 27, 2019, 02:33:01 PM

Yes possibly a mold number. Has no important meaning.

Title: Re: Muncie casting numbers on passenger side?
Post by: 69Z28-RS on November 27, 2019, 02:55:24 PM

Perhaps no important meaning to 'us' (fifty years later), but I'm also certain it had some important meaning to someone during the design/manufacturing phases...  :)    otherwise it would not be there.

Title: Re: Muncie casting numbers on passenger side?
Post by: Maxsg1973 on November 28, 2019, 04:45:24 AM

I'm trying to understand when this case was cast. Does anyone know where the casting dates are on a late 68 muncie case? I have read what I could find online but I don't see the two circles that are divided into two halves that is called the date marker.

Title: Re: Muncie casting numbers on passenger side?
Post by: rare396bronze on November 28, 2019, 05:30:10 AM

Go to the main forum page to drive train decode it will show you a picture. If it is the original it will be at the back of the main case going up the passenger side. Should have a date code and partial vin of your car. Hope this helps.

Title: Re: Muncie casting numbers on passenger side?
Post by: 69Z28-RS on November 28, 2019, 12:47:57 PM

That stamped date would be the *assembly date* for the transmission, not the *cast date*...
.. but generally speaking, I don't think the cast date would not be very far in advance of the assembly date...

Title: Re: Muncie casting numbers on passenger side?
Post by: Maxsg1973 on November 28, 2019, 01:46:20 PM

I am familiar with my assembly date and vin stamps. I can see them clearly. My question is where do you find the cast date? All I see is the 163 number with two dots on the side.( see picture ) What am I missing? I have a feeling this is the cast date information but I can't find reference information on how to decipher. If someone has a a picture or knowledge of where the cast date is please post a picture if possible. My car is 68 L78.

Title: Re: Muncie casting numbers on passenger side?
Post by: TangoBravo on November 28, 2019, 08:42:42 PM

The 13 is a mold number. The 2 split circles seemed hit and miss and were used up through 68 model years. Likely the second large number is a month with the dots indicating the week. I have seen one case like this in Paul Cangialosi's book page 21. The second large number castings seemed to only last a short while. The casting dates later changed to a grid style around 1971 or so.

Title: Re: Muncie casting numbers on passenger side?
Post by: bertfam on November 28, 2019, 09:29:20 PM

Read THIS (http://www.camaros.org/forum/index.php?topic=15782.0;all) starting at reply 18.

Ed

Title: Re: Muncie casting numbers on passenger side?
Post by: luv2sixty9 on November 28, 2019, 11:08:39 PM

I believe it was casted in May, so your car's build date is probably July.

Title: Re: Muncie casting numbers on passenger side?
Post by: ZLP955 on November 29, 2019, 08:27:23 AM

Quote from: luv2sixty9 on November 28, 2019, 11:08:39 PM

I believe it was casted in May

Where did you get that?