Gary Sweetland

Thanks Pete. I did know the shafts were different. And the J type is metric as opposed to the imperial D type. I realise it’s major surgery to even adapt it to the more conventional D type. I’m a retired engineer having worked with repairing and making car parts for most of my career. And have a workshop with a lathe and a mill. So for a laugh, I was considering making the parts. The housing would be easy from solid Aluminium. But hardening the shaft would be expensive and I’ve no idea how much to harden it. My other idea was to try and adapt a BMW N47 6 speed box. They’re only a couple of inches longer than the Vitesse box. But I think the issue might be they’re a bit fatter. And it’s tight on the chassis with a Vitesse. 🤔

Thank you all. I think in hind sight your right and looking at pictures it’s a Dolomite over drive. It’s probably not worth the hassle trying to graft it to my box. 🫤

Hi All, I have the opportunity of getting a J type overdrive unit with the Serial Number of 25 115869 010289. I have managed to identify that it has a Triumph Spitfire rear housing, as apparently they are unique in having a mounting point for the gearstick housing. But the number doesn't seem right for a Spitfire. I have found only one reference to the number on line, and that was someone guessing it was for a GT6, which makes sense. Is anyone out there in the Sports six community in the know? I was maybe hoping to use it on my Vitesse 2.0Ltr Mk2. So a Spitfire one might not handle the torque of a six. This is probably more out of curiosity, as I haven't got the adapter housing, main shaft and oil pump cam. And they look an exorbitant cost. And I'll have to strip it down and see if it's worn out before spending..