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> 915 transaxle question / info, a silly question...
CCSmith58
post Dec 3 2022, 12:20 AM
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Hello 914world… Just renewed my Membership !! Now looking to get my moneys worth...

I’m having a ’75 914 built into a 914-6.
Maybe 10 or 20 years ago I might have tried to do (some of) it myself.
Now I’m more a “pay the money, turn the key” guy.
Here’s a “silly” question. Likely the first of many….
How does a 915 Transaxle work when converted to a mid engine application ??
Not looking for a “how to” just an overview for personal info.
I’ve searched for articles, webpages and / or videos and don't find much.
I find acknowledgements of the conversion but no detailed or even general description.
I see the term “flipped ring and pinion”.
Does the whole gear system run backwards ??
Does just the differential run backwards ??
How would a LSD work in a converted 915 ??
Are the available 916 Kits good ??
Etc...
Any info or links to info would be appreciated !!
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T.Rick6
post Dec 6 2022, 06:47 AM
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CCSmith58 Question for ya, what size engine / HP are you running ? Depending on HP you may be better off with a beefed up 901 and save you tons of $$$.

If you still want a 915 another contact would be Joe Cogbill @ CogsCogs.com; he's just finished another flipped 915 with the Martin Bott kit.

In preparation for my factory 6 build I purchased a rebuilt '71 914-6 901 ($3,800), had it converted to side shift ($250), replaced the intermediate plate, bearing retainer and bearing ($1200), 108mm output flanges & hubs ($700) for a mild twin plug 3.0 ..

The deal with the 3.0 engine fell thru; I ended up buying a package deal out of a failed 914-6 race program; 330 hp 3.4 with a flipped 915 for less than a bare bones 3.0. Not trying to sell you anything but my 901 is available if interested.

There are downsides to a flipped 915, weight and shift linkage are 2 most common issues.

Good luck, add pics when you can..

Todd (IMG:style_emoticons/default/beerchug.gif)
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CCSmith58   915 transaxle question / info   Dec 3 2022, 12:20 AM
Cairo94507   Welcome. Contact Patrick Motorsports in Phoenix, ...   Dec 3 2022, 07:28 AM
mepstein   Welcome. Contact Patrick Motorsports in Phoenix,...   Dec 3 2022, 07:34 AM
Steve   :agree: I’m running the setup in my 914. Works...   Dec 3 2022, 08:30 AM
stownsen914   If you'd like to do a 915 in a 914, you might ...   Dec 3 2022, 08:37 AM
Steve   PMS sells all the conversion parts and shift linka...   Dec 3 2022, 08:57 AM
Cairo94507   I just re-read the entire linked thread....really ...   Dec 3 2022, 09:53 AM
sixnotfour   Ring and Pinion Ratios are Motor specific.. early ...   Dec 3 2022, 10:58 AM
troth   PMB was just advertising a conversion package on F...   Dec 3 2022, 11:27 AM
brant   Short answer about the 915 In the 911 that it was...   Dec 3 2022, 12:45 PM
echocanyons   Eric and the PMB team just finished the 916 conver...   Dec 4 2022, 11:16 AM
Cairo94507   I am so very jealous. PM sent. :beer2:   Dec 4 2022, 11:36 AM
rgalla9146   Did the conversion myself except for R&P set u...   Dec 4 2022, 12:41 PM
stownsen914   The thing I don't love about 915 conversions f...   Dec 5 2022, 10:06 PM
Steve   :confused: No different than a 911….   Dec 5 2022, 11:40 PM
Dave_Darling   Some basics, here-- The "ring and pinion...   Dec 6 2022, 03:59 AM
mepstein   Martin Bott has the 916 conversion parts for sale....   Dec 6 2022, 06:34 AM
T.Rick6   CCSmith58 Question for ya, what size engine / HP ...   Dec 6 2022, 06:47 AM
Cairo94507   I would spend time researching Joe Cogbill before ...   Dec 6 2022, 08:23 AM
mepstein   I would spend time researching Joe Cogbill before...   Dec 6 2022, 09:10 AM
Steve   I would spend time researching Joe Cogbill befor...   Dec 6 2022, 09:31 AM
brant   To the OP You need to check also the gearing you w...   Dec 6 2022, 10:11 AM
slivel   The question of hp/torque limits on the 901 transm...   Dec 6 2022, 10:39 AM
brant   I also drained and replaced the gear oil every s...   Dec 6 2022, 10:51 AM
slivel   One other advantage of the 901 transmission is tha...   Dec 6 2022, 10:48 AM
Cairo94507   @slivel - Excellent feedback re your 901 experien...   Dec 6 2022, 11:00 AM
CCSmith58   GrEaT input here !! Thanks !! :...   Dec 7 2022, 08:01 PM
Steve   GrEaT input here !! Thanks !! ...   Dec 8 2022, 06:55 AM
Dave_Darling   So, How do you "flip" the ring gear ??...   Dec 11 2022, 04:49 PM
CCSmith58   So, How do you "flip" the ring gear ?...   Dec 14 2022, 12:51 PM
dr914@autoatlanta.com   expensive and not worth doing. We have done severa...   Dec 8 2022, 10:36 AM
slivel   Good point from Steve: "I switched to the lat...   Dec 8 2022, 11:33 AM
eric9144   I have a WEVO based 915 done by Patrick Motorsport...   Dec 8 2022, 11:45 AM
mepstein   I was just talking about this with 914Dave today. ...   Dec 8 2022, 05:17 PM
Steve   I was just talking about this with 914Dave today....   Dec 9 2022, 07:55 AM
mepstein   [quote name='mepstein' post='3043990' date='Dec 8...   Dec 9 2022, 08:32 AM
stownsen914   If you've ever messed with a custom shifter se...   Dec 10 2022, 11:01 AM
Eric_Shea   Kelly’s is amazing. With a spherical Firewall bu...   Dec 8 2022, 07:59 PM
JWest   Shifter information: all 915 conversions that have...   Dec 10 2022, 01:12 PM
mepstein   Shifter information: all 915 conversions that hav...   Dec 10 2022, 01:21 PM
rgalla9146   Shifter information: all 915 conversions that hav...   Dec 10 2022, 01:43 PM
Steve   Shifter information: all 915 conversions that ha...   Dec 10 2022, 03:03 PM
live free & drive   Here is a good thread from 914Dave about his ...   Dec 10 2022, 05:41 PM
Steve   Here is a good thread from 914Dave about his ...   Dec 10 2022, 06:55 PM
mepstein   Here is a good thread from 914Dave about his ...   Dec 10 2022, 07:38 PM
rgalla9146   [quote name='live free & drive' post='3044459...   Dec 10 2022, 08:16 PM
Steve   [quote name='live free & drive' post='3044459...   Dec 11 2022, 01:08 PM
6er   lots of info   Dec 12 2022, 05:50 PM
914dave   I cant believe its been ten years since i did the ...   Dec 13 2022, 01:00 PM


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