[TR] Late TR6 top cover mystery

[glemon at neb.rr.com]

Does it have overdrive? Seems like I read somewhere that overdrive boxes need to be vented, maybe that is the reason.

Greg Lemon

---- EDWARD <fogbro1 at comcast.net> wrote: 
> 
> List, 
>   
> Does anyone have a clue to the reason for the small steel plate on the top cover of very late TR6 gearboxes? It covers a small rectangular hole in the top cover and is secured by the two rear top cover set screws and 2 additional 1/4-28 setscrews. The gearbox in question is prefixed "CC" follow by a digit number. 
>   
> Ed Woods