3speed hub problem

[icantbreath]

hi.
i sometimes have a weird grinding sound but this only happens in shift 1 and never in 2 or 3

and most of the time it happens when after a traffic light stop. 1/9 of the time orso. but quickly goes back to the normal sound after i stop pedalling and pedal again.

my question is: do you think its a planetairy gear problem inside the hub . i need a cone wrench to open the hub to look tomorow.


grammer check: no

thanks