Shimano downtube shifter pod maintenance???

[Nothin-fancy]

I recently got a set of Shimano Dura Ace 7401 index/friction down tube shifter's and I'm wondering if there's any maintenance I should do to the shift pod inside the lever? I'm wondering if it needs grease or lube like brifter's???

Google just has answers about cleaning friction shifters and I already know that. I've only had Campy or Suntour indexed shifters before so this is new...

 

[Nothin-fancy]

Just looked at my Zinn's repair manual and it says that there's no maintenance for it.

That shifter has the loudest index click I've ever heard. Which is why I was wondering if it got grease or something. No wonder they complained about other riders hearing your shift in the peloton. LoL