Gidday, my 2012 90 gearbox has developed a chatter when under load, this can be heard and felt through the gear stick and more prevalent when at running temp, so cold running not as bad, the chatter can be partly silenced if you put p pressure on the gear stick or moving it around while driving, I get it in all gears when under max load or change early at low revs, anyone got a similar problem or heard of this before?