For Triumph TR3B, TR4, TR4A, TR250 and TR6 with early gearbox a NOS gearbox mainshaft Triumph 208051 for non overdrive gearboxes. This mainshaft has SAE threads ( non metric) on the flange end and is for for non overdrive transmissions. The 208051 shaft has been unavailable as a new part for many decades. This 208051 mainshaft has been in a parts bin since the 1970's. As it is made of steel, it has a little light surface rust from sitting in the bin for 50 some years. It is a long heavy part. 

Some cars have had gearbox and gear swaps over the years so make sure your gearbox is the early model. The later model mainshaft has metric threads. 

We are the Sport and Classic Car Company located in Houston Texas since 1976. We supply new parts for British cars built from 1946-2021.  All of our inventory is available through our Houston workshop location so can be sold at any time.

We supply restoration services, rebuilding work, repairs and parts for a great many cars built in England. We have stocks of original new old stock Lucas, Girling, Lockheed, BMC, Rover, British Leyland, Triumph, MG, Jaguar, Mini, Rolls-Royce and Bentley parts and have parts for many other British marques.  

Check our other listings for rare and unusual parts as well as interesting pieces! We have an inventory of new old stock parts from British car dealers that retired and import parts houses that closed. Many NOS parts have been stored away for decades and are now coming to the surface. Parts data was kept on paper key card files by hand as computers did not exist so listing and identifying parts now is a laborious process. We have made a lot of car owners very happy with rare and basically unavailable NOS parts we have been able to provide. These parts are generally excellent for restorations or for owners wanting the best quality parts remaining.

All of our EBAY sales are items that help raise funds for animal rescue. EBAY handles the proceeds from these sales and makes the disbursements to 503C animal rescue groups. Some of the parts are ours and others have been donated by our automotive clients that are aware of our animal rescue efforts. Preparing and selling the parts is essentially a free service we provide car part donors. They get the parts out of their life without a hassle and enjoy knowing where the proceeds go.