I will be doing a lot of modding soon. I have CAI and crank pulley installed. I have headers, mufflers and spacers ready to install (waiting for cold weather to break) and I'll probably replace the clutch soon (engagement gets shorter after spirited driving). I have 90k miles on the car and everything runs fine.
The trans doesn't slip and shifting still feels firm for the most part but I'm wondering if there's anything I can do to beef up the trans. Should I replace any synchro's or have the fluid changed in preparation for all the mods and how much will this run? I know some may say "if it ain't broke don't fix it" but I'm a believer in preventive maintenance, plus I know it'll probably shift smoother and feel like it came off the show room floor if I put a little work into it.
Any ideas/suggestions would be appreciated,

Thanks,

~Brian~

 

You should change the fluid I think at 100K miles. Get the new Honda manual trans fluid.
Clutch replacement is likely not needed unless the car is slipping & there are signs of it going bad.