View Full Version : TR2/3/3A TR2000/2500 gearbox on a TR3 ?

10-11-2017, 06:12 AM
A friend of mine, not speaking english at all, is facing a difficulty that I would like to solve for him : has someone already managed to fit what seems to be a TR2000 / TR2500 gearbox, with OD (with a 1 inch diameter input shaft) on a TR3, as a replacement of a non OD gearbox (with a 1.25 inch input shaft) ? To do so, is it possible to fit a TS2000/2500 clutch plate in a TR3 clutch mechanism ? If not, as a more expensive alternative, would it be possible to fit a complete TR2000/2500 clutch assembly on the TR3 engine inertia wheel ?

10-11-2017, 07:14 PM
Hi LH64,
You posted your question in the wrong place. The "Forum Navigation Help" forum is for asking questions about how to navigate and do things on this forum. I am moving your question to the Triumph forum where you are likely to get more answers.

Welcome to the BCF,


10-12-2017, 04:38 PM
I replaced my original TR4 gearbox with a complete OD gearbox and clutch assembly from a Triumph TC2500.
For info see..........https://www.tr-register.com.au/Files/technical/2500gearbox.htm