ronhatch Posted May 9, 2022 Report Share Posted May 9, 2022 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 Quote Link to post Share on other sites
stuart Posted May 9, 2022 Report Share Posted May 9, 2022 (edited) The GR suffix denotes a rebuilt box and it would be over stamped on top of the original numbers so it may not necessarily have been a later box to start with. Stuart Edited May 9, 2022 by stuart Quote Link to post Share on other sites
ronhatch Posted May 9, 2022 Author Report Share Posted May 9, 2022 Cheers Stuart, I found a photo and the earlier number is the correct box for the TR4, but thanks for the reply, I'm going to open it up to inspect and replace all the seals. Regards Ron Quote Link to post Share on other sites
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