Hi all, I'm currently rebuilding a TR4 and I have a TR4A to start in a later life, both have O/D gearboxes but they have been that long in the shed that I forget which belongs to which and I want to match the original with its own car. The TR4 is 1962 and the A is 1966 the gear boxes are numbered C (Maybe G)T 3511 and GR81574 , logic says that the 3511 is the earlier box but Triumph had that many configurations it was confusing so I hope there is an oracle out there who can help .
Regards
Ron