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Posted by: rick 918-S May 23 2014, 02:38 PM

Couldn't find a thread. I know I've read one or two. Stock rears for a 901 in a factory 6. Anyone gots a link?

Posted by: jmill May 23 2014, 02:59 PM

http://www.californiamotorsports.net/901.htm

A,GA,O,V,ZA

Posted by: poorsche914 May 23 2014, 03:03 PM

Ratios:
914-4 914-6
11:34 11:34 1st
18:34 18:32 2nd
23:29 23:28 3rd
27:25 27:25 4th
31:22 29:22 5th
ring and pinion gear: 7:32 (Same on both)

http://members.rennlist.com/chuxter/901&915ratios.htm

Posted by: jmill May 23 2014, 03:09 PM

7:31, 7:32, whatever it takes.


https://www.youtube.com/watch?v=iX3kxAA2L4Q

Posted by: r_towle May 23 2014, 04:05 PM

charts


Attached image(s)

Posted by: Dave_Darling May 23 2014, 05:53 PM

The charts are not for a stock 914 transmission. They're for a 915, as used in the 72-86 911.

(Yeah, I know the 916s used 915 boxes--but they were prototypes, not series production cars.)

The info jmill and poorsche provided is correct.

--DD

Posted by: GeorgeRud May 23 2014, 05:56 PM

My memory is a bit fuzzy, but I seem to remember that the gear ratios (or final drive) was different for the -6 from the -4.

Posted by: jmill May 23 2014, 06:09 PM

All the info I found states they're the same.




Attached image(s)

Posted by: mskala May 23 2014, 08:04 PM

Yes, the 7:31 ring-pinion and the A/GA/O/V/ZA is correct.

Useless info of the day; If you have a sportomatic -6 they are:
7:27 ring-pinion, 15:36,20:31,24:27,28:24

Posted by: Cap'n Krusty May 23 2014, 09:36 PM

QUOTE(poorsche914 @ May 23 2014, 02:03 PM)

Ratios:
914-4 914-6
11:34 11:34 1st
18:34 18:32 2nd
23:29 23:28 3rd
27:25 27:25 4th
31:22 29:22 5th
ring and pinion gear: 7:32 (Same on both)

http://members.rennlist.com/chuxter/901&915ratios.htm

Posted by: Jon B May 23 2014, 11:31 PM

Factory 914 workshop manual page on transmission gear ratios.
Confirms what others have already said.
Ratios for 914/6 were the same as 911 5-speed of same period.



Jon B.
Vista, CA