Thanks Jim,
You just confirmed my suspicions! Is the Ring gear for the MkIV and Early
Spits the same? It would appear that it is since the ring
gear I received fits perfectly on the Quaife carrier?
Joe
James Gambony wrote:
>
> Joe,
>
> The Mk IV had a 4.11 ratio... and the big flange input and stub axles.
>
> There is a distinct difference between the early (small flange) and late
> diff's. The input (pinion) shaft is approx 1/8" larger on the later diffs
> (visual estimation... from memory late on a Friday night etc etc etc). The
> stub axles are also different, early stubs will spin freely in a late diff
> carrier without engaging.
>
> Since all year Spitfires (and GT6s) used the same u-joints, it's all a
> matter of figuring what flanges are on the diff and matching flanges on the
> prop shaft and axles.
>
> So, back to your question. No, you can't fit the early pinion in the late
> casing (unless you do something like sleeve the pinion shaft or fit a
> different bearing).
>
> The early ring may fit on a late carrier (or TR7 4 speed carrier, they're
> stronger). And that carrier may fit in an early casing... if it works let
> us all know! :-)
>
> Cheers,
>
> Jim
>
> > -----Original Message-----
> > From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net]On
> > Behalf Of Joe Curry
> > Sent: Friday, January 19, 2001 3:42 PM
> > To: Friends of Triumph
> > Subject: Spit Diff question
> >
> >
> > I am hoping someone has broad enough knowledge of early and late
> > Spit and GT6 differentials me sort out something.
> >
> > John Kipping told me that he had various gear sets available when
> > I spoke to him about Quaife carriers. Among the variety was a 4.11
> > gear set. So I ordered one along with the Quaife unit. Both
> > arrived yesterday.
> >
> > Here I am inspecting what I have and noticed that the ring and
> > pinion gears looked very familiar. So I rummaged through some parts I
> > took out of a Herald differential and compared them with what I
> > received. Guess what???? They are identical.
> >
> > The question is: Will the early Spit/Herald gears fit into the
> > later pumpkin that is required for the Quaife unit?
> >
> > I already fit the ring gear onto the carrier and it fits
> > perfectly. But I have not yet received the case Brian Schlorff
> > shipped me to
> > see it the pinion fits properly. I looked at all my parts lists
> > and cannot find a 4.11 gear set for any later diff, and all the
> > bearings are different part numbers. So I am stumped.
> >
> > What do you say? Did I buy this unnecessarily? And more
> > importantly, do I have 2 sets that won't work?
> >
> > Thanks in advance,
> > Joe
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