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RE: Overdrive

To: Peter Cebalo <cebalo@NthShore.govt.nz>
Subject: RE: Overdrive
From: Huw Upshall <hupshall@wolfenet.com>
Date: Mon, 23 Nov 1998 15:48:06 -0800 (PST)
Ok, there is a local wrecking yard that has the overdrive transmission +
overdrive + solenoid rebuilt for $675 including core which I don't have so
that sucks.  What would this NOT come with?

Shift lever?
Switch?
Angle speedo unit?

oh boy, this is getting exciting... @#%!


On Tue, 24 Nov 1998, Peter Cebalo wrote:

> BY FAR the easiest method is to find a complete transmission. I
> converted mine the hard way by adding it to the existing transmission. 
> 
> If you wish to use your existing tranny, there will be problems finding
> some of the parts, especially the top cover and remote assembly. If you
> choose this method, you'll probably want to replace all the bearings and
> syncro rings,layshaft etc etc. ends up costing lots but you end up with
> a better unit.
> If you do it this way you'll need: ( minimum )
> 
> "J" type OD - ( careful - different types, some of the rear casings are
> different - some don't have the upper mounting holes e.g. 73/74 Spifire
> Mk IV - 3 rail type , TR6 , TR 2500 saloon, Dolomite, Stag - check the
> speedo gears too... )
> new mainshaft
> rear main shaft bearing ( unless it's loose :-) likely you'll damage the
> old one taking it off the shaft - hey, replace  them all ) 
> top cover 
> inhibitor switch gear
> remote assembly tower ( not available new )
> adapter plate ( sometimes difficult to get )
> oil pump cam and circlip ( if these didn't come with the OD , also
> expensive )
> gaskets ( tranny to adapter, adapter to OD )
> mounting plate
> rubber mounting assembly ( best to use a new one )
> speedo angle drive ( these are really expensive - about US$90 ? - I have
> some of spares )
> speedo cable
> shortened propshaft ( get it balanced at the same time - check the UJs )
> OD gear change lever (not available new )
> OD switch, knob and cap ( available new )
> wiring ( use the live wire from the reverse light )
> 
> Put you off yet ??
> 
> Finding a COMPLETE OD Transmission in good condition could be a
> challenge. Always check the magnetic drain plug on the transmission for
> fragments of metal and the colour of the fluid. If possible remove the
> top cover and look for wear on the teeth and syncro rings. Condition of
> the OD is hard to tell without separating the front and rear casings and
> inspecting the clutch surfaces. If you remove the sump plate on the
> bottom of the OD, you can check the magnetic strip on the plate for
> obvious problems. Hard to check the solenoid even by applying 12 volts
> to it - if it doesn't click - probably faulty - even if it clicks it can
> still be faulty... 
> 
> Hope this helps
> 
> Peter Cebalo
> 
> Auckland, New Zealand
> 
> 73' Spitfire Mk IV ( with "J" type overdrive added 'the hard' way )
> 
> 
> 
>  
> 
> 
> >
> 


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