MGB third gear problem

["Andrew Errington" <ame@synaptics.com>]

Hi all,

occasionally when I slow down hard by braking and dropping into 3rd gear the
car jumps out of gear.  Often this is quite quiet but annoying, sometimes it
makes a loud bang or similar noise.

Does anyone know what can cause this?  I am hoping it is not serious.

Andy
--
'69 MGB Roadster