928 six speed?????
Thread Starter
Rest in Peace
Rennlist Member
Rennlist Member
Joined: May 2006
Posts: 9,903
Likes: 2
From: Bird lover in Sharpsburg
928 six speed?????
I was looking for some help on a different forum and I cam e across this.
What say you folks here?
link to thread.
http://www.garagejournal.com/forum/s...ad.php?t=93010
-------------------------------------------------------------
"Since you work on these, I'm sure you know the company that makes the Porsche conversion kit to use the Vette Tremec/Getrag transaxle...given any thoughts to upgrading to a 6 speed?"
-------------------------------
My reply
Nope, the dimensions of the C5/C6 transaxle are all wrong for a 928.
Been talk and drawings of a six speed for ten years, even a web site, but alas, it is vaporware.
I wish there was a conversion kit for them, we really need a good strong 5/6 speed for some of the cars, the stock units are only good for about 500 FT/LBS max.
I may have to end up putting the auto back in mine when I do the stroker this year (possibly next at my rate).
I have a good 89 auto which has a different ratio than my 87, a 2:56 vs the 2:20.
They are never done as long as you drive them, it seems
and his to mine
-------------------------------------
The Getrag diff will bolt up to Keisler RS 600 with the adapter from the back of the Tremec box (Vette)...and the T56/T6060 internals will fit in the T45/RS 600 case with a custom extension on the housing.
If you're interested, PM me.
---------------------------------------------------------
I did PM him for more info...................
What say you folks here?
link to thread.
http://www.garagejournal.com/forum/s...ad.php?t=93010
-------------------------------------------------------------
"Since you work on these, I'm sure you know the company that makes the Porsche conversion kit to use the Vette Tremec/Getrag transaxle...given any thoughts to upgrading to a 6 speed?"
-------------------------------
My reply
Nope, the dimensions of the C5/C6 transaxle are all wrong for a 928.
Been talk and drawings of a six speed for ten years, even a web site, but alas, it is vaporware.
I wish there was a conversion kit for them, we really need a good strong 5/6 speed for some of the cars, the stock units are only good for about 500 FT/LBS max.
I may have to end up putting the auto back in mine when I do the stroker this year (possibly next at my rate).
I have a good 89 auto which has a different ratio than my 87, a 2:56 vs the 2:20.
They are never done as long as you drive them, it seems
and his to mine
-------------------------------------
The Getrag diff will bolt up to Keisler RS 600 with the adapter from the back of the Tremec box (Vette)...and the T56/T6060 internals will fit in the T45/RS 600 case with a custom extension on the housing.
If you're interested, PM me.
---------------------------------------------------------
I did PM him for more info...................
Rennlist Member
Joined: Jul 2002
Posts: 2,095
Likes: 2
From: Massachusetts
Greg,
I've never heard about this mythical 6 speed kit, but it was cool seeing pictures of your shop with multiple 928s. I didn't realize it, but Sharpsburg is only about 30 minutes from my father's shop in Griffin. Next time I'm home (I'll be there in June for a wedding), I'd love to stop by and introduce myself if you're around.
I've never heard about this mythical 6 speed kit, but it was cool seeing pictures of your shop with multiple 928s. I didn't realize it, but Sharpsburg is only about 30 minutes from my father's shop in Griffin. Next time I'm home (I'll be there in June for a wedding), I'd love to stop by and introduce myself if you're around.
Last edited by EspritS4s; Feb 28, 2011 at 01:43 AM.
Thread Starter
Rest in Peace
Rennlist Member
Rennlist Member
Joined: May 2006
Posts: 9,903
Likes: 2
From: Bird lover in Sharpsburg
cool, come on by, and I hope it is not your wedding.
Greg,
I've never heard about this mythical 6 speed kit, but it was cool seeing pictures of your shop with multiple 928s. I didn't realize it, but Sharpsburgh is only about 30 minutes from my father's shop in Griffin. Next time I'm home (I'll be there in June for a wedding), I'd love to stop by and introduce myself if you're around.
I've never heard about this mythical 6 speed kit, but it was cool seeing pictures of your shop with multiple 928s. I didn't realize it, but Sharpsburgh is only about 30 minutes from my father's shop in Griffin. Next time I'm home (I'll be there in June for a wedding), I'd love to stop by and introduce myself if you're around.
Rennlist Member
Joined: Jul 2002
Posts: 2,095
Likes: 2
From: Massachusetts
Race Director
Joined: Sep 2004
Posts: 16,271
Likes: 82
From: Stockton, CA
I think the company was called motordyne or something like that....but it was all smoke and mirrors...bottom line is it won't fit....
I know that RSGear makes plenty of strong transmissions....
http://www.rsgear.com/performance/viper.asp
Here is their medium performance version.... I talked to them a while back and they said they could make 928 internals out of the better 9310 alloy...which would provide the strength needed.....He thought it would cost a bit more than tranzilla...he said maybe $7k for something that will hold 800ftlbs
What about other transaxles used in mid engined kit cars....like the Porsche G50 series or the Riccardo unit from the Ford GT...both of those are well under $10k....
I know that RSGear makes plenty of strong transmissions....
http://www.rsgear.com/performance/viper.asp
Here is their medium performance version.... I talked to them a while back and they said they could make 928 internals out of the better 9310 alloy...which would provide the strength needed.....He thought it would cost a bit more than tranzilla...he said maybe $7k for something that will hold 800ftlbs
What about other transaxles used in mid engined kit cars....like the Porsche G50 series or the Riccardo unit from the Ford GT...both of those are well under $10k....
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Mar 2002
Posts: 18,648
Likes: 52
From: Buckeye, AZ
Beaten to death many times here:
http://www.motodyne.com/frames/porsche_928_6spd.html
Talked about but never seen in the flesh.
http://www.motodyne.com/frames/porsche_928_6spd.html
Talked about but never seen in the flesh.
Trending Topics
Addict
Rennlist Member
Rennlist Member
Joined: Jun 2003
Posts: 9,386
Likes: 72
From: Helsinki, Finland
There is one German 928 with 968 Turbo S gearbox IIRR. It required extensive modifications to fit. Its not working solution for street cars with rear seats still in place etc.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)
Joe Kucinski
Porsche Shakes Up The Nürburgring Lap Record Table Once Again
Verdad Gallardo
6 Ways the Porsche 911 GT3 S/C Redefines Performance
Joe Kucinski
10 Wildest Homologation Specials Porsche Ever Sold
Verdad Gallardo
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home
Verdad Gallardo
10 Porsche Opinions That Can Start a Fight
Joe Kucinski
Nordschleife Master
Joined: Jul 2003
Posts: 7,742
Likes: 78
From: Minneapolis
Beaten to death many times here:
http://www.motodyne.com/frames/porsche_928_6spd.html
Talked about but never seen in the flesh.
http://www.motodyne.com/frames/porsche_928_6spd.html
Talked about but never seen in the flesh.
Then again, if the money is there, the work can be done.
Rennlist Member
Joined: May 2009
Posts: 2,762
Likes: 13
QUOTE......"""The Getrag diff will bolt up to Keisler RS 600 with the adapter from the back of the Tremec box (Vette)...and the T56/T6060 internals will fit in the T45/RS 600 case with a custom extension on the housing.""""
Where is that link?
I have a C5 differential and am still contemplating mating it to an AX15 as the internals are the same as an R154 from a toyota Supra and the newer Aisin MA5 found in the Pontiac Solstice (LS1 swap). If there is another tranny it will bolt to I'm all ears.
Where is that link?
I have a C5 differential and am still contemplating mating it to an AX15 as the internals are the same as an R154 from a toyota Supra and the newer Aisin MA5 found in the Pontiac Solstice (LS1 swap). If there is another tranny it will bolt to I'm all ears.
Rennlist Member
Joined: May 2012
Posts: 319
Likes: 2
From: 88 928 S4 in Dallas, TX
I bought a Jaguar XJ12C from a gentleman called Robert Hall who runs a company called the driven man.
He specializes in 5 and 6 speed conversions using tremec transmissions and offers turn key kits for Jaguars amongst other American muscle cars.
He may be worth talking to, if you can get 10 or so people together who want this conversion. Here is his link: http://www.thedrivenman.com/
He specializes in 5 and 6 speed conversions using tremec transmissions and offers turn key kits for Jaguars amongst other American muscle cars.
He may be worth talking to, if you can get 10 or so people together who want this conversion. Here is his link: http://www.thedrivenman.com/
Race Director
Joined: Sep 2004
Posts: 16,271
Likes: 82
From: Stockton, CA
Other 928ers are working on a new trans that uses an automatic rear end housing (ring & pinon +LSD) mated to a stronger manual trans.....Jerico at this point....but its not done, yet....
