915 transaxle question / info, a silly question... Options

[CCSmith58]

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 !!

[CCSmith58]

GrEaT input here !! Thanks !! (IMG:style_emoticons/default/biggrin.gif)
My 914 build is "in process" although still a year out... (IMG:style_emoticons/default/wacko.gif)
I've already bought the '95 993 3.6 and a rebuilt / beefed up 915 transaxle.
The 915 was being built to use in a 400hp 911.
The Gentleman I bought it from decided to go to a G50 unit.
PMB is building the car.
I'm just trying to educate myself about crazy alterations and conversions all you 914ers
have been dreaming up and perfecting.

DD, thanks for your post. That's the kind of info i'm looking for...

So, How do you "flip" the ring gear ?? Do you replace the pinion shaft (gear) ??
Would an OS Giken lsd work in the 914 application ??
Again not looking for a how to, just info...

[Steve]

GrEaT input here !! Thanks !! (IMG:style_emoticons/default/biggrin.gif)
My 914 build is "in process" although still a year out... (IMG:style_emoticons/default/wacko.gif)
I've already bought the '95 993 3.6 and a rebuilt / beefed up 915 transaxle.
The 915 was being built to use in a 400hp 911.
The Gentleman I bought it from decided to go to a G50 unit.
PMB is building the car.
I'm just trying to educate myself about crazy alterations and conversions all you 914ers
have been dreaming up and perfecting.

DD, thanks for your post. That's the kind of info i'm looking for...

So, How do you "flip" the ring gear ?? Do you replace the pinion shaft (gear) ??
Would an OS Giken lsd work in the 914 application ??
Again not looking for a how to, just info...

Check out this link regarding flipping the rear gear / diff.
http://forums.pelicanparts.com/porsche-911...-ring-gear.html
It is just flipping the diff, but the article does mention clearance and rubbing issues.
I switched to the latest 915 trans because the 914 trans drove me up the wall with my 3.2 motor on the street. I felt like I was shifting all the time. Because my 915 gearing was designed for the 3.2, all the gears are taller and now its like driving a stock 911. It’s also much nicer on the freeway. My trans is a 1986 trans which was the last year they were made. Regarding LSD, most aftermarket LSD sell a course spline LSD and fine spline LSD. The 914 trans and early 915 are course spline LSD’s and can be interchanged. The 8:31 915 is a fine spline LSD. I wanted the Guards TBD LSD, but they were on back order, so I settled on a KAAS LSD. https://kaazusa.com/tech-library/the-kaaz-a...lutch-type-lsd/ I also recently bought a 1995 993 motor. Hope to get it installed this summer. Hope I will still be happy with the gearing. A popular upgrade with a 3.6 is to put the tallest 5th gear "TL" in the box. The motor will now run 80 mph at 3k rpms.