Shimano Deore shifters 'clunking'

[MountainSide]

I've had this problem before when you click down a gear and it just clunks and you have to click a 2nd time for it to operate correctly. In the past I have fixed it for a while by cleaning the mechanism and also by replacing them. Is there a definitive reason for it? Do they just wear out or should I try a new cable before replacing them again?? They are 9 speed (x3), think I currently have the 590's. Maybe there is a better replacement?

 

[Slick]

I've had this problem before when you click down a gear and it just clunks and you have to click a 2nd time for it to operate correctly. In the past I have fixed it for a while by cleaning the mechanism and also by replacing them. Is there a definitive reason for it? Do they just wear out or should I try a new cable before replacing them again?? They are 9 speed (x3), think I currently have the 590's. Maybe there is a better replacement?

I can sometimes get this. So far a good clean and lube sorts it.

 

[Drago]

The Shimano grease hardens with age and starts to grab the pawls so they don't release properly. A good juice up with GT85 etc will hopefully cure it.

 

[MountainSide]

Just took apart "to clean" and found the cable frayed. Will clean anyway and get a new cable and see where we get....