W123 Hard to Shift Manual Trans?

[Überlandung Geländewagen]

Hey all,

I've got an '83 240D manual trans that's been running perfectly for the past year until yesterday when it became really hard to shift gears. When the shifter is in neutral position it is hard to move back and forth, and as a result difficult to get it into 1st and 2nd. Once in gear it's fine, but it is almost undrivable. Shift bushings are new. Could this be worn out gear linkage? Thanks in advance.