Thanks for the quick response, Joe.
First, do you know the pinion gear tooth count for the 3.27 and 3.89?
If the pinion gears are the same, the 3.89 crown/ring gear would be
BIGGER (in diameter) than the 3.27's crown/ring gear, so wouldn't there
be more than enough room for a (smaller) 3.27 gear in a 3.89 case?
Second, what's a "2.37" diff from? Sounds like something you'd want
for dry lakes top speed racing. Since I've never seen it listed as a
stock part, is it really an available item?
Third, to be practical, are the GT6 parts most likely to break the same
as the Spitfire parts, or are they unique?
Thanks,
MDN
--- Joe Curry <spitlist@cox.net> wrote:
> Doc,
> All the GT6 and MkIV/1500 Spitfire diffs have common parts for the
> most
> part. The big exception is the 3.27 which had such a large crown
> gear that
> the offset is different. I think that requires the case to be
> different as
> well. I learned this when I was looking for a limited slip for the
> 2.37 and
> discovered that the Quaife only fits the other GT6/MkIV and 1500
> units but
> not the 3.27.
>
> So, If you are planning to use the 3.27 and want a spare, you are
> advised to
> find a 2.37 pumpkin and keep it on your parts shelf.
>
> Joe
>
> -----Original Message-----
> From: spitfires-owner@autox.team.net
> [mailto:spitfires-owner@autox.team.net]
> On Behalf Of M D Nugent
> Sent: Saturday, September 02, 2006 3:35 PM
> To: spitfires@autox.team.net
> Subject: Spitfire differential with GT6 ring and pinion gears
>
> I have a GT6 3.27:1 differential that's untested, but they're not
> known
> as all that robust in the first place.
>
> I also have a couple Spitfire 3.89:1 differentials that have the
> later,
> larger flanges (same as GT6 flanges according to Robson's text).
>
> Just in case the GT6 diff breaks (or is already broken), can its ring
> and pinion gears (presuming they're good) be transplanted into one of
> the Spitfire diffs without drama?
>
> M D "Doc" Nugent
> Renton, WA (USA)
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