912 5 speed gear ratios? |
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912 5 speed gear ratios? |
Bleyseng |
Aug 10 2005, 07:52 PM
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#1
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
anyone know what the stock gears are in a 912 901 5 speed tranny?
thanks |
lapuwali |
Aug 10 2005, 08:39 PM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
Yes. A F M S X. The 4-speed is A H Q X.
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Aaron Cox |
Aug 10 2005, 09:57 PM
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#3
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
and then the legendary 923 box for a 912E ( a 915 with a 901 splined input shaft)
someone said there was an early 911/912 5 speed that was A E I O U (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) |
lapuwali |
Aug 10 2005, 10:21 PM
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#4
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
The so-called "vowel" box would have been a close-ratio for short-circuit racing, or maybe for hillclimbs. U would be pretty short for 5th (105mph at 6000rpm). The X top-gear in the 5-speed 912 is quite a bit shorter than the top gear in a 914. 70mph is 4000rpm. The earliest 911 pattern (1964) was AA GA O U Y. |
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Bleyseng |
Aug 10 2005, 11:01 PM
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#5
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
sometimes "Y"? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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Kostamojen |
Aug 11 2005, 12:10 AM
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#6
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Newbie Group: Members Posts: 37 Joined: 30-July 05 From: Roseville, CA Member No.: 4,504 |
Just curious, but is there a good reference website or thread with various porsche transmission gear ratios, final drives and such? And since im a Noob here, maybe a reference for what the A E I O U, etc. lettering refers to exactly in gear numbers... (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
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redshift |
Aug 11 2005, 12:13 AM
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#7
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
AND W! "Nucalear" M |
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Jake Raby |
Aug 11 2005, 12:26 AM
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#8
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
My 923s gearing was the same as the same year 915- Both my tranny's are... The difference was the "E" had a shorter tire....
923 trannys areweird, much more is changed than just the input shaft. |
ArtechnikA |
Aug 11 2005, 06:59 AM
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#9
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
of course! if Charlie Davis got $1 for every time someone linked to his page, he'd be a very rich man... 901-914/915 Ratios Page |
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Bleyseng |
Aug 11 2005, 07:07 AM
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#10
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Hmm, I don't see it listed on Chuxter's site like that. I guess I will swap in the shorter fourth gear thou. http://members.rennlist.com/chuxter/901&915ratios.htm |
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Matt Monson |
Aug 11 2005, 08:24 AM
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#11
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Member Group: Members Posts: 156 Joined: 9-August 05 From: Boulder, CO Member No.: 4,562 Region Association: Rocky Mountains |
The "vowel" box is the 902/50 if you are looking at the case mark to try and identify one, while the 902/0 and 902/1 are respectively the four speed and 5 speed boxes that were in the 912's. Even though they got a 902 transmission type, they were still 901 boxes when it comes down to it. For quick reference the ratios are as follows: A: 11:34 H: 19:32 Q: 24:27 X: 28:24 & F: 18:34 M: 22:29 S: 25:26 Let me know if you need ratios for any other letter designations or spec boxes. I have all of the factory Technical Specifications books as the ratios changed significantly from year to year and model to model in the 911 line following '64... |
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Kostamojen |
Aug 11 2005, 12:50 PM
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#12
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Newbie Group: Members Posts: 37 Joined: 30-July 05 From: Roseville, CA Member No.: 4,504 |
Thanks alot (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) |
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Aaron Cox |
Aug 11 2005, 01:13 PM
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#13
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
scanned factory stuffs....
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