[Fot] Spitfire Gearbox

chasgee22 at gmail.com chasgee22 at gmail.com
Thu Dec 13 12:46:09 MST 2018


Yes, and the TR7 4 speed too.  Another source for single rail close ratio gear sets.  Have to modify the input shaft though.

Chuck

> On Dec 13, 2018, at 10:07 AM, Brian Schirano via Fot <fot at autox.team.net> wrote:
> 
> 
> good to know on the trans cases. similarly, are the Spit and GT diff cases the same/interchangeable?
> 
> 26A GT6+, 28 TR6
> Brian 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 Eells
> Sent 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
>> Spit #80
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