[Fot] Spitfire Gearbox

[fubog1]

 Different prefix letters in the ##, F = spit, K = GT-6.Among the differences besides tooth count, they also changed the tooth profile/angle, mainshaft, 1st motion etc.Cases are the same, at least up to the single rail box.
Glen
 
 
-----Original Message-----
From: Brian Schirano <bschirano at yahoo.com>
To: tr4abrad <tr4abrad at gmail.com>; Jason Sukey <jsukey at gmail.com>
Cc: FOT list <fot at autox.team.net>; fubog1 <fubog1 at aol.com>
Sent: Thu, Dec 13, 2018 1:07 pm
Subject: Re: [Fot] Spitfire Gearbox


good to know on the trans cases. similarly, are the Spit and GT diff cases the same/interchangeable?
26A GT6+, 28 TR6Brian Schirano
585-305-0349 Cell 
BSchirano at yahoo.com 

    On Thursday, December 13, 2018, 12:42:32 PM GMT-5, Jason Sukey via Fot <fot at autox.team.net> wrote:  
 
 Brad,     Externally, the GT6 and Spitfire boxes will look the same.  I believe the case is interchangeable, it's just that you have to use ALL GT6 gears, or ALL Spitfire gears, no mix and match.  GT6 has the close ratios.
The GT6 input shaft has to be shortened to be used in a Spitfire, and the spline count is different.
Jason
On Thu, Dec 13, 2018 at 12:21 PM Brad Eells via Fot <fot at autox.team.net> wrote:

Interesting...I received three gearboxes with my Spitfire. 
In the car is an overdrive box. The other two are standard 4 speed Spitfire boxes; one labeled ‘wide’, the other ‘close’.
Now you have me wondering what’s inside??
How did they build different ratio boxes back in the day?

Brad EellsSent from my iPhone
On Dec 13, 2018, at 8:30 AM, fubog1 via Fot <fot at autox.team.net> wrote:


 No you can't just change a couple gears, the GT-6 uses completely different bits, and there are 2 different GT-6 boxes, most parts not interchangeable.
Glen
 
 
-----Original Message-----
From: Mathieu W. Huovinen via Fot <fot at autox.team.net>
To: fot <fot at autox.team.net>
Sent: Thu, Dec 13, 2018 10:38 am
Subject: [Fot] Spitfire Gearbox

Triumph Friends,Now that we've all worked out the oil cooler/filter issue, who wants to take a crack at Spitfire gearbox ideas?? I currently have a 1296 engine bolted up to a 1500 single rail gearbox. This year after the Kastner Cup, Marty Sukey suggested finding at GT6 gearbox as they have a closer ratio gear set - I think I even remember reading that some of the LeMans Spitfires had GT6 gearboxes. I'm having a difficult time finding one so I was going to ask the folks that have been this a lot longer than me, is it possible to just put GT6 gears (specifically 2nd and 3rd) into a 1500 Spit gearbox? Has anyone tried? Are there better options? I have two extra 1500 single rail boxes to mess with. Any help would be appreciated. Thanks!M. Huovinen
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