I have a 1961 feb. build. My rear end case has casting No.3743833, casting date J40 and stamping AN1014. Is this the rite part for my car.How many months back on the casing date is allowed for all drive line parts. Please help
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Re: P case casting dates
Jeffrey, IMO, yes. 833 carrier is a posi carrier. The AN indicates this carrier was used with a manual transmission. NCRS leeway is six months, yours falls within this time frame. Regards, -
Re: P case casting dates
Sounds like you've got a winner Jeffrey. At the present time, posi cases are not judged in NCRS. If they were, only skinny, slippery people would be allowed to judge. Fat people like me would need mirror extentions, powerful flashlights, and telescopic sighting devices. However, there are many slippery, skinny judges in NCRS who could probably wiggle underneath the car, especially if it were judged on a grass field in the rain. (like Lake Placid)
The six month thing is arbitrary. A feeling for time lags is developed over a period of time in judging many cars. For example a 935 block cast in December of 1960 and assembled six months later would not be "typical of factory production" and therefore suspect. I'm not saying it would be impossible, but just atypical. I've got a 1962 4-Star Bowtie Candidate that still has it's original shock absorbers, untouched, and they have 1960 dates with the correct part numbers!
The "tightness" of your casting date and the assembly date/usage code is typical of factory production in my opinion.
Enjkoy the 61. Drive it!
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