Poppin' out eh?
Bugger, I had the same trouble with my L52 H.D. Turned out to be worn shifter forks. Try Marlin Crawler. Maybe you can replace the forks on your W-series without a complete tear down. Good luck!
L43dean-1968 Fj40 LandCruiser,1980 Rn47 Hi-lux Pickup 4WD and 1985 Rn65 ExtraCab Truck 4WD. YEP!