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-   -   915 Transmission serial number ranges?? (http://forums.pelicanparts.com/porsche-911-technical-forum/537251-915-transmission-serial-number-ranges.html)

jass 04-17-2010 05:37 AM
915 Transmission serial number ranges??
 
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 04-17-2010 06:15 AM
Quote:
Originally Posted by jass (Post 5300455)
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 02-20-2013 10:41 AM
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 02-20-2013 11:37 AM
4 speed.

canyon.classics 01-26-2015 06:13 PM
Help Needed decoding 915 Trans
 
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.http://forums.pelicanparts.com/uploa...1422328370.jpg

javadog 01-27-2015 04:15 AM
Possibly a 915/63 from a 1980 US 911SC.

JR

Bill Verburg 01-27-2015 04:17 AM
Quote:
Originally Posted by canyon.classics (Post 8457493)
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.http://forums.pelicanparts.com/uploa...1422328370.jpg
My 1980 US/Cdn SC, 915/63

archstanton 10-08-2022 07:03 PM
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 10-09-2022 01:59 PM
Quote:
Originally Posted by archstanton (Post 11817288)
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 04-27-2023 04:43 AM
Can anyone help decode my 915 serial# to determine year and type?
Thanks so much.
Serial # 7329533

http://forums.pelicanparts.com/uploa...1682599369.jpg

javadog 04-27-2023 04:53 AM
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 04-27-2023 06:14 AM
Quote:
Originally Posted by javadog (Post 11984417)
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 04-27-2023 06:26 AM
Quote:
Originally Posted by Matt Monson (Post 11984490)
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 04-27-2023 07:16 AM
Quote:
Originally Posted by javadog (Post 11984417)
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. http://forums.pelicanparts.com/uploa...1682608549.jpg

javadog 04-27-2023 07:22 AM
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 04-27-2023 07:48 AM
Quote:
Originally Posted by javadog (Post 11984605)
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 04-27-2023 07:53 AM
Quote:
Originally Posted by 917_Langheck (Post 11984649)
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 04-27-2023 08:47 AM
Quote:
Originally Posted by javadog (Post 11984605)
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. SmileWavy

javadog 04-27-2023 09:27 AM
Quote:
Originally Posted by Matt Monson (Post 11984718)
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. SmileWavy
No worries, if you wanted to actually look up what he had, you need an earlier spec book. :D

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:

http://forums.pelicanparts.com/uploa...1682616356.jpg

Matt Monson 04-27-2023 09:41 AM
I thought I was looking at an aluminum gearbox, but now I see it’s a 7 digit serial numbered case.


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