Cut Away Tranny
Dean Tetterton
Richmond.VA
At a recent meeting of the Richmond Triumph Register, it was agreed to have a session on Triumph transmissions, and as I rebuild trannies I volunteered to hold the tech. session.
I pondered about the best way to conduct the class and decided that what I really needed was a "cut-away" model to demonstrate. I had an old TR3 transmission which was not worth rebuilding because the gears had deep rust pits on a lot of the teeth. The case was good and I didn't wish to cut the side out of it. I therefore decided to build a `case' out of wood!
With the wooden case it is possible to see how the gears mesh and shift all the forward gears. The front extension, rear extension and top cover are bolted to the wooden frame with threaded inserts. These can then be unbolted, and the transmission dismantled step by step as outlined in the workshop manual, and with the openness of the wooden frame it was easy for everyone to see what is happening.
The photograph will give a clearer indication of what I constructed, and the session was a great success, giving all present a better understanding of what "synchro cups" are, what is meant by constant mesh gears, and why you should change your transmission oil on a regular basis.
Now members have expressed a desire for a session on engines..I wonder if I can make a wooden block....?
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