Trans cooler, drive slow, whether you drive in SS or D in my opinion doesn't matter at all, you just need to drive it like an old lady, no passing other cars at high speeds, no racing or high speeds in general, just calm relaxed driving, that's what saves ANY atuo trans, whether it's an SS fro a Prelude or any other, it's running your transmission hard that kills it, so if you want this one to alst a little longer, baby it, and I mean BABY it!
Good luck man.
P.S.--Oh, and that 300K Kilo SS is an amazing story! Wow, I'm not joking AT ALL! That might be the record. The highest milage I've seen to date on an SS was I think 181k miles...How many miles is 300K kilo's?
EDIT: Huhhhhh!?!?!?! IT IS! It translates to almost 186.5K miles!
Hey man, I would like to know if you can ask that guy the EXACT milage on his car, and really ask him, seriously, if he has ever had any trans issues or a trans replaced. Could you do that? I'm just curious.