Jim,
To make matters more interesting, this is a right hand drive car. It has a
Spit frame under it(ends were chopped off). The car, from what I'm told, was
made up of a combination of RHD & LHD parts. Now what went with what is
anyone's guess. I suspect the Gearbox came from the LHD car. The diff begins
with FD I believe. So I put a late Spit differential in the car & it should
be back to US spec as far as the speedo is concerned, but what about the
speedo itself? It's in MPH so I think it's a US spec speedo? The tyres are
bigger than stock so I would think it would read slow. Lots of questions, but
I guess the big thing is to get the wife's car back together!
I think I'm gonna fill'r up with oil & see if it leaks. The idea of pressing
off the bearings and the dreaded pinion seal doesn't really excite me too
much.
Cheers,
Todd Bermudez #596
Cincinnati, OH
'68 GT6 MK1 RHD
'66 GT6 MK1 RHD
'67 GT6 MK1 LHD
--- On Fri, 3/27/09, Jim Muller <jimmuller@rcn.com> wrote:
> From: Jim Muller <jimmuller@rcn.com>
> Subject: Re: [Spits] Separating spring from Diff
> To: Spitfires@autox.team.net, jimmuller@rcn.com, "NASS Spitfire"
<nass@yahoogroups.com>
> Date: Friday, March 27, 2009, 9:36 PM
> On 27 Mar 2009 at 15:39, Todd
> Bermudez wrote:
>
> > Guess I should mention, this GT6 does have an
> overdrive
> > gearbox...maybe it won't make a bit of difference
> then?
>
> Ah! If the gearbox and diff were original, or if both
> were swapped
> out by someone so that the diff matches the gearbox as the
> factory
> intended, then you probably had a 3.89 after all.
>
> If someone had switched to an OD gerarbox but not swapped
> the diff
> then you had European gearing. (Lord knows what your
> speedometer
> would have read though! Did the PO who did the swap
> change its drive
> gear too? Nobody knows.) In that case you will
> notice the revs
> increase on the highway, but with the new diff it will be
> back to
> what the factory wanted you to have.
>
> I was noting on my drive home today that in 4th the speed
> is double
> the tach reading (e.g. 4000rpm == 80mph, though my tires
> make the car
> a bit slower than it reads), and at those speeds the
> speedometer and
> tach needles are parallel. As far as I know I have a
> 3.27 diff; I've
> never bothered to look up the speed vs. rpm figures.
> Well, actually
> I have but I never bothered to remember them.
>
> --
> Jim Muller
> jimmuller@rcn.com
> '80 Spitfire, '70 GT6+
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