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914World.com _ The Paddock _ 915 Transaxle: Taller 5th gear for a 7:31 box

Posted by: pcar916 May 31 2018, 05:18 PM

Ok Folks,
I'm building a 915 for a stock 3L SC. It's a 7:31 R&P and on the highway it's a screamer. I'm thinking perhaps a TL or TM 5th gear.

Anybody got either of those pairs in good condition of those of you running 915's... inverted or otherwise?

Shiny side up!
Ron

Posted by: andrew15 Jun 3 2018, 10:12 AM

I have a TM 915 gear available - sort of.

Unfortunately, it came with a bunch of other gears and parts and looks like it came from a trashed gearbox - The gear looks to have gotten hot - the needle bearing / carrier looks to have failed and woiuld need to be pressed out.

I'll get a few pics up later today - if it looks like it would work for you, I'd be looking at $50 given its condition.

Thanks
Andrew M

Posted by: pcar916 Jun 7 2018, 01:19 PM

Thanks Andrew, I'll consider it. If you post those pics I'll take a look!

Posted by: sithot Jun 26 2018, 05:31 AM

Matt Monson at Guard.

http://www.guardtransmissionllc.com/products/transmission-gear-sets/915-gears/

Posted by: pcar916 Jun 28 2018, 07:14 PM

QUOTE(sithot @ Jun 26 2018, 06:31 AM) *

Matt Monson at Guard.

http://www.guardtransmissionllc.com/products/transmission-gear-sets/915-gears/


Thanks!
I've talked to Matt a bunch of times over the years and got my 914/LSD from him years ago. They make good stuff. I talked to him recently in fact to get an LSD for my Cayman transaxle only to find out that he only makes TBD's for them any more. He can get those high 915 gears but I'm trying to get them for a lot less than the astronomical prices they fetch these days... dang it!

Posted by: naro914 Jul 11 2018, 11:12 AM

I will most likely have a bunch of stock gears available but not until next year. Dawe's Motorsports will regearing our 915 over the winter. Was supposed to happen last year, but some things came up.

Posted by: Justinp71 Jul 13 2018, 02:32 PM

I'm in the same boat. Have you thought about running a 8.31 R&P? This would also make 1st gear more usable too.

Posted by: pcar916 Jul 21 2018, 06:48 AM

QUOTE(Justinp71 @ Jul 13 2018, 03:32 PM) *

I'm in the same boat. Have you thought about running a 8.31 R&P? This would also make 1st gear more usable too.


That would do it for sure but this is a friend's transaxle. He likes the low-end torque.. a lot and simply wants a highway gear, thanks.

Posted by: pcar916 Jul 21 2018, 07:37 AM

QUOTE(naro914 @ Jul 11 2018, 12:12 PM) *

I will most likely have a bunch of stock gears available but not until next year. Dawe's Motorsports will regearing our 915 over the winter. Was supposed to happen last year, but some things came up.


Thanks, so far I've found a couple of suppliers but costs are in the $800 range. My two mag-case gearsets are both a little lower than the one I'm trying to replace now. So even using my own won't work.

BTW, I haven't welded your excellent engine mount into Penelope yet but won't until I finish this 911 build. It'll be later this year and I'll send pics.

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