[TR] 10 spline diameters?

Bud R levilevi at comcast.net
Mon Jan 5 12:27:56 MST 2015

Thanks to all who helped with information on spline diameters and transmissions. Seems to be a lot more involved than anticipated to adapt a TR6 transmission to a Spitfire. Big surprise eh? 

My incentive was that I have a TR6 4 speed that was in good shape before a took it out and put a tranny with OD in my TR6. I was trying to recycle what I had.

I was mostly looking to have  the “next” transmission ready to go when the inevitable happens in the race car. I have a GT6 transmission with close ratio gears presently but haven’t found a source for close ratio gears for a GT6 transmission. Still looking for a suitable and not too involved replacement or a set of GT6 close ratio gears. Maybe a  TR7 4 speed, but haven’t seen one available close to Denver.

Thanks list and have a great New Year.
Bud Rolofson

Extreme Parts Racing (more than just a haircut)

71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle 
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)

On Dec 19, 2014, at 1:10 PM, Bud <levilevi at comcast.net> wrote:

> Listerati,
> What is the diameter of a 10 spline input shaft on a GT6 transmission? Is it the exact same size as a 10 spline TR6 transmission?
> I'm thinking of mating a TR6 tranny to a Spitfire that already has a GT6 tranny. Anyone done this? 
> I heard that Kas adapted a TR6 to a Spit but haven't seen in any of his books what is involved. Hope he see's this post and can provided the details. My hope is that I'm half way there with a GT6 tranny already in place and can use the existing clutch and flywheel.
> Also, any recommendations on companies that reline clutches? The existing clutch is apparently a custom hybrid for a GT6 tran mated to a Spit.
> Thanks
> Bud
> Sent from my Commodore 64

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