67 saginaw casting numbers

[bcmiller]

Of some interest. In my observation, over the years, the part number is often one or two numbers higher than the casting number. In this case, casting number is 3890564, part number is 3890566

Yep, that’s pretty widely known.

[Keller-L30M20]

So back to the original question, What is the proper casting numbers of a Saginaw 5 speed trans cast iron parts for a November built 67 Camaro?  Thanks

[Keller-L30M20]

Oops meant 4 speed - Fat fingers

[bcmiller]

So back to the original question, What is the proper casting numbers of a Saginaw 4 speed trans cast iron parts for a November built 67 Camaro?  Thanks

I used to walk by these transmissions at swap meets all the time. I have a buddy that I see once it a while that may have one. If I find one, I can let you know.

[KurtS]

They are not easy to find. They didn't hold up and they weren't desirable. I'd probably install a Muncie if I didn't have one.

[Keller-L30M20]

I have no intention of racing it or beating on it. That's the whole object of putting it back to original is there are so few of them remaining because they have been converted to Muncie. This one does have the proper Saginaw, just the wrong year Saginaw

[Keller-L30M20]

I may have stumbled on to trans with one grove and casting numbers of main case 3890664 k 26 6 or (3890564) side cover 3840527 J 23 5 -Am I on the right track?

[bertfam]

I may have stumbled on to trans with one grove and casting numbers of main case 3890664 k 26 6 or (3890564) side cover 3840527 J 23 5 -Am I on the right track?

No, you stated that your car was started the 5th week of October, 1966 (10E), so that transmission won't work for you. That main case was cast on Saturday, November 26th, 1966, so it's dated a month AFTER your car was built. Also, the side cover is dated October 23rd, 1965, so it's way too early. Are you sure about the 5? Maybe it's a 6?

Ed

[Keller-L30M20]

It is a 6 on the side cover, photo was a little fuzzy. But what I'm looking at are these the proper casting numbers for that time frame build? And who's to say these wasn't service trans installed under warranty sometime early 67, But I'm looking more at the casting numbers. Thanks Ed

[KurtS]

A month early is pretty darn close - right casting - all depends on how exact you want to be.

[Keller-L30M20]

Thank You

[bertfam]

If you're looking for something date coded correct to the car, then I agree with Kurt, go with a month prior. Something in the mid to late September (I) or early to mid October (J) range. But if you're looking for a transmission that would have been replaced under warranty, you can go up to 5 years after the car was built, but you'll need to find one with a CT code. The GM warranty period back then was 5/50 (5 years or 50k miles, whichever came first).

Ed

[Keller-L30M20]

It gives me some options, as long as I can get it close, I can live with that. I bought that trans for $100 and it has a single grove on the shaft so it's the right gearing. But now that I have a few options, I'l keep my eyes open and continue reading the site blog. Thanks for everyone's help.

[olddragracer]

Remember that main case casting number 3890564 was use in 3 speeds, cars and trucks. That should make it easier to find one with the correct date code. The side cover is 4 speed only. I believe the extension housing is also the same for 3 an4 speeds. You would have to piece a transmission together. That can be done if you want the correct date codes.

[Keller-L30M20]

OK, I did find a trans that's close but have another question. On the bottom where the usage is stamped below the side cover, instead of the usual R9A26 being stamped, this trans has R1130. I know the R stands for Saginaw 4 speed but what does the 1130 mean?