l52 3rd n 4th gear clicking

[FARnotFAST]

Howdy n good day to all U fun folks!! I have an L52 in an 81 i've had since 1987...yep,loooong time..
and after several hundreds of thousands of  happy miles....
when i shift into 3rd n 4th ONLY,,,little bit o' gear clicking
up or down....3rd n 4th only!!!!   bestow upon mE thy great wisdom!!!!    plz...

[Rocksurfer]

Great wisdom of the day... post questions in the proper section.

  II