You can tell it's 4 years since I worked on these things, you're right in
that there are two different tailshaft housings - but it isn't 3 and 4
synchro, it's up to 1971 and from 71. The mainshaft (and therefore rear
housing) was modified for the Spitfire IV and GT6 III, all earlier cars use
the smaller type.
John Kipping
----- Original Message -----
From: "Aaron Johnson" <fpspitfire37@msn.com>
To: <fot@autox.team.net>
Sent: Thursday, November 06, 2003 6:02 AM
Subject: spitfire tail shaft housing
> So I did made some queries this morning and found manufacturers part
numbers
> for the two different spitfire gearbox output bearings. What I found were
> the following measurements
>
> Early Bearing:
> OD 1 7/8" ID 5/8" width 9/16"
>
> Late Bearing
> OD 2" ID 3/4" with 9/16"
>
> Based on that I would have to assume that the tailshaft housings are
> machined differently between the 3 and 4 syncro versions. I did confirm
on
> my broken housing that the oil seal rides in a different bore than the
> bearing, which would explain why the housings use the same oil seal.
>
> aaron
>
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