[Healeys] BN1 first gear synchro and coupling adaptor

[helen standfast]

Hi listers

I have a query re my BN1 first gear and synchro, the synchro cone and 
coupling adaptor were loose on the splines which allowed the units to 
slide about 6-8 mm away from the gear. We removed the worn cone and plan 
on replacing it with a new cone using the recommended method as per the 
manual.  The coupling adaptor looks to be in perfect condition as does 
the first motion shaft and gear.  When I press the coupling adaptor onto 
the spline in preparation to fit the cone, it has the same 6-8 mm 
movement when the shoulder is pressed against the gear (ie it is not a 
press fit right up to the gear).  My question is will the shrink fit of 
the new cone be sufficient to hold the coupler tight against the gear or 
should we either get a new coupler or use some form of adhesive or 
silver solder to secure?

thanks


Noel S