Date: Wed, 9 Apr 2003 18:18:27 -0500
Reply-To: Bruce Nadig <motorbruce@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bruce Nadig <motorbruce@HOTMAIL.COM>
Subject: Re: G 50 - What is it?
Content-Type: text/plain; format=flowed
I can definitely agree with most of what Eric wrote. The one thing that I
must respectfully disagree on is the information regarding the limited slip
differential. It is true that a limited slip was available on the G50 gear
boxes, but it was most certainly an option, and and option that was not
chosen all that often.
By the time Porsche started building the G50 'boxes their cars had really
moved upscale. Owners were becoming more and more concerned with choosing
the option of a supple leather interior (as opposed to plain old leather)
and fancy trim items than they were with choosing hidden options in the
transmission. After all, how many of their buddies at the country club could
see the limited slip, much less understand its function?
Eric's description is a good one, but I would add that the G50 'box is just
about bulletproof. Currently I am doing a Porsche 3.2 Carrera conversion on
my '87 GL and I decided to go with the G50 'box rather than use the Vanagon
tranny. The cost for a used G50, while high, is only a little more than I
would have to pay a quality rebuilder for a properly-built high-horsepower
Vanagon tranny rebuild. One drawback, because the G50 boxes are so good,
they are almost impossible to find used. I could locate a couple of modified
G50s, but there was only one place I could find in the country that had a
good used G50 sitting on the shelf. Unfortunately, I couldn't afford the
extra expense of a limited-slip diff this time around.
As an aside, last night my Cary Chang, my friend Jody (a Porsche Master
Mechanic) and myself test fit my 3.2 motor and G50 gearbox into my parts
van. It was loads of fun. Let me know if you want to see some pictures.
Bruce
>From: Eric Fournier <eric.fournier@ALAMEDANET.NET>
>Reply-To: eric.fournier@ALAMEDANET.NET
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: G 50 - What is it?
>Date: Wed, 9 Apr 2003 16:45:40 -0000
>
>John Rodgers <j_rodgers@CHARTER.NET> said:
>
> > Can any one tell me what a G 50 (?) tranny is and what's so special
>with it?
> >
> > Thanks,
> >
> > John Rodgers
> > 88 GL Driver
> >
>It's Porsche. Here's some info swiped from the Ultima GTR site:
>
>In 1987, the G50 gearbox was installed into the Carrera 3.2 911. This
>transmission used Borg-Warner syncromesh instead of the Porsche-
>design balk-ring system to improve the shift quality and lessen the
>effort required to change gears, especially from a stop. These
>gearboxes were rated at 221 ft/lbs of torque. The G50’s have been
>utilized with several variations of gearing and speeds. The 993
>series was the first 911 offered with a 6-speed version of the G50
>design. These later units also introduced significantly improved
>clutch cooling.
>
>Other versions of the basic design, called the G50/52 series, were
>used in the 3.3 C2 Turbo and 3.6 C2 Turbo cars. These transmissions
>also have stronger differentials and cases and a type of Limited Slip
>differential that locks 20% under power and near 100 % on the overrun
>to minimize trailing-throttle oversteer. All of the G50 cars use the
>240mm clutch size introduced on the earlier Turbo cars and they are
>now hydraulically actuated.
>
>Eric Fournier
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