Parts for 915 when 1st and 2nd hard to shift.

[Burint]

Hello,
My 915 came with the 3.2 U.S. 1984 which is now 24 years old.
The 1st and 2nd are hard to shift and making grinding noise.
What would be on the part list necessary beside those usual
synchro rings and synchro hubs for the 2 gears?
Thanks

[Flieger]

You checked the shift linkage bushings for structural integrity and proper lubrication, right?

Also make sure the coupler is in proper alignment.