915 Transmission serial number ranges??

[jass]

Does anyone out there know of a table that lists the serial number ranges for 915 transmissions? My old 915 is serial number 71513385 which I don't this is the original trans in my '72 coupe, and I am looking to maybe buy a 915 with serial number 7196279. What year would this serial number be from??

Also, can anyone tell me where on the transmission to look for the 915-type designator on the transmission (ie, 915/12, or 915/16, 915/44, etc)

[Peter Zimmermann]

Originally Posted by jass

Does anyone out there know of a table that lists the serial number ranges for 915 transmissions? My old 915 is serial number 71513385 which I don't this is the original trans in my '72 coupe, and I am looking to maybe buy a 915 with serial number 7196279. What year would this serial number be from??

7 = trans for 6 cyl car
1 = 5-speed
9 = 1979
6279 = consecutive build number

Also, can anyone tell me where on the transmission to look for the 915-type designator on the transmission (ie, 915/12, or 915/16, 915/44, etc)

That number will be stamped on the same surface as the serial number. I discuss some of the type numbers in my 915 repair Tutorial, please refer to...

Porsche Wiki: Forum Categories

Click on "915"

Your "715" number has too many digits, but it's probably a '75 trans. Also, please remember that the '79 trans uses an electronic speedometer, while your '72 uses a mechanical unit with a place to connect a cable. 1975 was the last year for mechanical speedos.

[Jesper]

I have this 915 with the number 726 1066. no 7 trans for 6 cyl and no 6 for 1976, but what about the no 2?

Best Regards
Jesper

[Matt Monson]

4 speed.

[canyon.classics]

So stumped again with my FrankenPorsche. Serial number is obviously a 915/ something but cant read what. Any help decoding this would be very helpful.

[javadog]

Possibly a 915/63 from a 1980 US 911SC.

JR

[Bill Verburg]

Originally Posted by canyon.classics

So stumped again with my FrankenPorsche. Serial number is obviously a 915/ something but cant read what. Any help decoding this would be very helpful.

My 1980 US/Cdn SC, 915/63

[archstanton]

I'm looking at a '76 3 liter carrera. The bar on the trans with the id numbers is badly scraped, but what I can see is

915/44 117164

The last part after the 4 is scraped with no numbers visible. There might be some kind of character between the "11" and 7, but not sure.

Anyway, anybody know what that "11" means?

[Matt Monson]

Originally Posted by archstanton

I'm looking at a '76 3 liter carrera. The bar on the trans with the id numbers is badly scraped, but what I can see is

915/44 117164

The last part after the 4 is scraped with no numbers visible. There might be some kind of character between the "11" and 7, but not sure.

Anyway, anybody know what that "11" means?

Standard format would be 716xxxx or 717xxxx depending on if it’s a 76 or 77 box.

If there’s an lsd in it, there will be a 12 between the type number and serial number, stamped in smaller numbers. No idea what an 11 would mean.

[sphillips1939]

Can anyone help decode my 915 serial# to determine year and type?
Thanks so much.
Serial # 7329533

[javadog]

To all of the people that ask about these transmissions, the information can be found in the technical specifications books, and also in the parts microfiche, in a table near the end.

[Matt Monson]

Originally Posted by javadog

To all of the people that ask about these transmissions, the information can be found in the technical specifications books, and also in the parts microfiche, in a table near the end.

Yeah, imma bust out my microfiche…

[javadog]

Originally Posted by Matt Monson

Yeah, imma bust out my microfiche…

OK, it’s also in the digital version of that microfiche that everybody should own, that is available for free, etc.

[Matt Monson]

Originally Posted by javadog

To all of the people that ask about these transmissions, the information can be found in the technical specifications books, and also in the parts microfiche, in a table near the end.

Later gearboxes change a bit from the early system. Here is from the 3.2 Carrera spec booklet.

[javadog]

Yes, they do. Porsche had no idea that that particular gearbox would be so long-lived.

It’s easiest to use the table in the parts catalog. It’s all in one place there, plus it’s free and you don’t have to buy 10 different little spec books to get it all.

[917_Langheck]

Originally Posted by javadog

It’s easiest to use the table in the parts catalog. It’s all in one place there, plus it’s free and you don’t have to buy 10 different little spec books to get it all.

It's only "free" if you can find it.

[javadog]

Originally Posted by 917_Langheck

It's only "free" if you can find it.

It was available free from any Porsche dealer. I think you used to be able to get it here on this site, as well.

I got mine a long time ago.

Pretty sure you can still access it for free from PCNA, here:

https://www.porsche.com/usa/accessoriesandservices/classic/genuineparts/originalpartscatalogue/

[Matt Monson]

Originally Posted by javadog

Yes, they do. Porsche had no idea that that particular gearbox would be so long-lived.

It’s easiest to use the table in the parts catalog. It’s all in one place there, plus it’s free and you don’t have to buy 10 different little spec books to get it all.

I didn’t meant to quote you. I meant to quote him. My post was for the guy who bumped the thread, whom I was actually trying to help.

[javadog]

Originally Posted by Matt Monson

I didn’t meant to quote you. I meant to quote him. My post was for the guy who bumped the thread, whom I was actually trying to help.

No worries, if you wanted to actually look up what he had, you need an earlier spec book.

His gearbox should be a 915/02, from 1972. Five speed, could be from a T, an E, or an S.

Sorry about the crap photo but it’s a screenshot from my computer:

[Matt Monson]

I thought I was looking at an aluminum gearbox, but now I see it’s a 7 digit serial numbered case.