Carrier shifting issue

[Jim Burrill]

Finally got Lance's Mk2 out to a farm to get some run-in time.

Starts well and has power. Turns fine.

At speed, trying to get shift into fourth gear is failing.

Shift lever goes int o the gate fine when exercising the shift pattern, but with engine running and carrier at speed, the gear won't cleanly engage.

No amount of finessing the shift lever will get it to stay in 4th.

SOme bit of grinding when letting out the clutch, but no worse than a sloppy shift in any other gear.

Seems the "throw" to move into 4th is short.

Off hand, anyone know of a fix for this?