I don't recall ever having any difficulty getting the rear extension housing
off.
I hop you didn't take the instructions too literally, and try to remove the
flange without removing the nut first. :-)
Do you have to do anything relating to the speedometer drive?
I forget, but does the speedometer drive assembly have to come out first?
A piece of 2x4 is an excellent substitute for a leather mallet.
You definitely do have to remove the rear housing, so that the
main shaft and the counter shaft can come out.
Doug Braun
'72 Spit
--- On Mon, 12/15/08, Jim Muller <jimmuller@rcn.com> wrote:
> From: Jim Muller <jimmuller@rcn.com>
> Subject: [Spits] help on gearbox disassembly
> To: Spitfires@autox.team.net
> Date: Monday, December 15, 2008, 10:18 PM
> I know it's supposed to be the reverse of re-assembly,
> but I'm still
> stuck on a few points.
>
> GT6 3-rail gearbox, no OD. I've got the top off,
> speedo drive
> removed, rear flange removed from the output shaft. The
> Haynes
> manual which I'm trying to follow gives two
> instructions, one to
> remove the nut on the flange and remove the flange, and
> another to
> remove the flange. I don't quite get what they're
> driving at; why
> two instructions unless there' something about the
> first that I
> missed. It looks like there is a rubber seal and a bearing
> in the
> extension housing.
>
> Anyway, the next step is to pull the extension off the box
> "by
> tapping underneath the mounting stud with a leather
> mallet." Yeah,
> right. The picture shows someone casually pulling the
> extension from
> over the shaft, but I'm not there yet. I've
> managed to lift the
> extension from the box by maybe 1/16th inch, just enough to
> break the
> gasket seal so I have to finish the job. But it looks like
> it is
> being held in place by that bearing possibly pressed into
> the end.
> Is the proper technique just to keep tapping so as to move
> a bearing
> off the shaft? Do I need to remove that seal first?
>
> I'm starting to wonder why I'm doing all this. The
> box sure looks
> good inside to my casual inspection. But now I'll have
> to re-seat
> that gasket or else force enough Hylomar into the space to
> seal it.
>
> So what's the magic incantation to pull that extension
> off? Is it
> just another pint of ale? I suppose I should be using a
> Bentley
> manual but it turns out mine is for the single-rail box in
> a 1500.
> Don't know whether it would be different.
>
> Thanks!
>
> --
> Jim Muller
> jimmuller@rcn.com
> '80 Spitfire, '70 GT6+
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