While on the  VIC Weekend targa, my gearshift suddenly went to crap.  I was having all sorts of problems  finding the right gears.  The cause of the problem was obvious when I opened up the access panel to check the gear shifter coupling to the gearbox.   The bushing in the coupler had fallen apart leaving a gap.This resulted in the shifter not properly located to the gearbox linkage.   The missing bushing also allowed the linkage to rotate freely within the yoke.   A koala pack from