Spitfire overdrive mainshaft question

[stillnotfinnished]

Hi all can anyone tell me if a single rail spitfire non overdrive box can  be made into an overdrive box by changing the mainshaft for an overdrive one?
Thanks

[Richard B]

Yes, but...


You need loads of parts like O/D adapter plate, OD gearstick , inhibitor switch...


If you have a good non-OD box and a tired O/D box you can make one out of two.

[stillnotfinnished]

That's good news, I've got most of the bits needed- less prop.
Next question is how easy- or not! is it to change the mainshaft?
Whats involed?
Thanks

[Richard B]

stillnotfinnished wrote:

That's good news, I've got most of the bits needed- less prop.
Next question is how easy- or not! is it to change the mainshaft?
Whats involed?
Thanks

Oh it's easy.   ;D

Complete stripdown, so you may as well overhaul the bearings and check the synchros etc..

[stillnotfinnished]

.....I'm worried now, I sence a touch of sarcasm!!  :P
The overdrive mainshaft is in a box with play in it, so I want to swop it into a 'known good' box.
How does the shaft come out?

[heraldcoupe]

stillnotfinnished wrote:

How does the shaft come out?

As Richard said, complete stripdown, everything else is built around the mainshaft,

Cheers,
Bill.

[stillnotfinnished]

Apart from my crusty old Haynes manual does anyone know if there is anything on the net about rebuilding the gearbox? I've looked without success
Thanks again

[Richard B]

Best to get a proper workshop manual.

Alternatively speak to Mike Papworth and have the job done for you.

[stillnotfinnished]

Hi
Had a look on e bay for a workshop manual and found someone selling manuals on cd's
Has anyone bought one of these? Are they any good?

[Pete Lewis]

if its the heritage ones they are just photo copied and loaded on disc,  advantage they have handbook, parts list, workshop manual and more all in one place .cover all models within the range .

disadvantge    cant use it in the little room unless you have a laptop.

Peter

[Clive]

http://www.vitessesteve.co.uk/Servicemanuals.htm

have a look on there, should be something helpful.............