 How to visually determine between a 915 and a 930 trans axle? |
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| HalfMoon |
 Sep 24 2018, 11:32 AM
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#1
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Senior Member  Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region  |
I'm trying to determine from this image just what box this is?
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| jcd914 |
Sep 24 2018, 12:31 PM
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#2
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
That is a 915 trans.
930 is beefier looking. Jim  |
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| burton73 |
Sep 24 2018, 12:32 PM
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#3
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burton73 Group: Members Posts: 3,490 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California 
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930 short 4 speed. This is upside down
Bob B   |
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| burton73 |
Sep 24 2018, 12:34 PM
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#4
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burton73 Group: Members Posts: 3,490 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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QUOTE(jcd914 @ Sep 24 2018, 11:31 AM)  That is a 915 trans. 930 is beefier looking. Jim Boy Jim they sure look close. My trans is a 930 for 100% sure Bob B |
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| Andyrew |
Sep 24 2018, 12:43 PM
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#5
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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The tail cone on the 915 is much larger, bloated. On the 930 its very slim.
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| HalfMoon |
Sep 24 2018, 01:04 PM
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#6
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
QUOTE(Andyrew @ Sep 24 2018, 02:43 PM) The tail cone on the 915 is much larger, bloated. On the 930 its very slim. Yes, a careful examination of google images reflected this difference in the two. I wonder if a year made can be guessed at from visual cues? Hoping the third part can get some numbers from it soon. Looks to be pre 78 as the case appears magnesium. Post 78 were aluminum, right? |
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| HalfMoon |
Sep 24 2018, 02:03 PM
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#7
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
Number is
915301301OR |
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| burton73 |
Sep 24 2018, 02:55 PM
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#8
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burton73 Group: Members Posts: 3,490 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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QUOTE(HalfMoon @ Sep 24 2018, 01:03 PM) Number is 915301301OR 930 starts with 930 so it must be a 915 Bob B |
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| nditiz1 |
Sep 24 2018, 03:19 PM
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#9
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Senior Member Group: Members Posts: 1,177 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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Are you selling this 915?
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| HalfMoon |
Sep 24 2018, 03:49 PM
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#10
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
QUOTE(nditiz1 @ Sep 24 2018, 05:19 PM) Are you selling this 915? No. I might be buying it. |
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| HalfMoon |
Sep 24 2018, 04:22 PM
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#11
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
Research indicates the first number (7) indicates it came from a series 911 car thus making it a 915 trans axle, the second number (1) is the gear ratio's (still trying to determine what that code number means), and the third number (5) indicates it's a 1975 box. The last four numbers are the serial number.
Seems to be some confusion about the second number (1) and the first number (7). Some say the first number (7) indicated an #03 box witch means it has a 5 sp w. optional ratio's and some say the second number (1) means it's a 5 sp standard ratio's What those "optional ratio's" might be, I have no clue. If it's a standard ratio then- 75-79 5 speed 915/40, 915/43, 915/44, 915/60, 915/61, 1st gear 11:35 2nd gear 18:33 3rd gear 23:29 4th gear 26:26 5th gear 28:23 Final Drive 8:31 Anyone verify? Also from Here´s info from Tech spec book 1st edition (5/1973) for decoding the second number of ´73 transmissions: (and keep in mind we've already identified this as a 1975 box so the following may be irrelevant) The 2nd number designation (1) number stands for "1 five speed standard ratio 5 sp, with oil pump and ground gears (915/00) 0001-5000 OR with shaved gears (915/01) 5001 -9999" According to the casting number the one we're examining is a OR casting. |
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| rgalla9146 |
Sep 25 2018, 10:09 PM
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#12
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Advanced Member Group: Members Posts: 4,545 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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Go to Blue Sky Motorsports
Click on Tech Info Full chart of all 915 variants |
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