Roger,
I've been gathering the parts to convert a 3 rail gearbox to OD for my '74
Spit. I was able to get the OD mainshaft ($230) from Spitbits, and the
adapter plate ($115) from Rimmer without any problems. Both items are still
listed as available from the respective suppliers. Rimmer also lists the
rear mount and mounting plate, which are different than the non-OD version.
There are a couple other parts that will be needed that I forgot earlier.
You'll need a 90 degree speedo cable adapter and OD inhibitor switch and
mounting bracket (keeps OD from engaging in 1st or 2nd gear.) Both are
shown as available from Rimmer, but others may have them as well. As Barry
pointed out, it is an involved conversion. And not cheap. But certainly
doable. And cheaper than a Ford type 9 5 speed conversion kit.
BillG
-----Original Message-----
From: spitfires-bounces@autox.team.net
[mailto:spitfires-bounces@autox.team.net] On Behalf Of v6spitfireguy@cox.net
Sent: Thursday, September 09, 2010 7:18 AM
To: elliottr@rmi.net
Cc: spitfires@autox.team.net
Subject: Re: [Spits] GT6 - Spitfire Overdrive questions
Roger,
As previously mentioned, the Spitfire tranny will not bolt up the the GT6.
The input shaft is different, as well as the bell housing, and as far as I
know no late model single rail could be made to fit without extensive mods
to the GT6 bell housing among other things. To fit a J type, which is what
I did on my 70 GT6 you would need the adapter (which is kind of rare since
it is only used on three rail Spits Heralds and Vitesse, the output or main
shaft which is also pretty rare, Overdrive mount and bracket, and overdrive
drive shaft (or you can shorten yours). You also need to cut the tunnel in
the floor to clear the overdrive unit, and add the cover extension (or make
your own) to cover the section that you just removed. Also, the wiring
would also have to be added for the switch - not really a straight-forward
conversion, but it can be done
Barry Schwartz
Original message
*************************************
I had a chance to buy a later Spitifire tranny with overdrive of unknown
condition fairly cheap. I did not buy it as I was afraid it would be
too much trouble to get it to work. Did I miss out on an opportunity? -
Not counting the possibility of selling it for a profit.
Also, I know of just an overdrive unit J type - supposedly good
condition. I assume the parts to connect to my GT6 tranny would be
impossible to find. Is that correct?
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