Gearbox woes

Unknown

Hullo everybody,

Help needed - yet again.  My 1928 HSS groans like a camel with toothache in second gera and on sustained steep hills also tends to jump out of (2nd) gear.  Not surprisingly, therefore, I'm looking to buy a good condition replacement gearbox  or the countershaft "nd speed gear and the meshing 2nd and high speed gera.  If any one can help, I'd be very grateful - and would welcome any suggestions, too.

Regards, Anthony O'Brien, South Wales, UK