teckno clutch?
 

just got a teckno kit for my mbx5t and wanted to know if i should use the clutch set up, im running mmm2200 on 4s, and if i do use the clutch should i use lighter diff oils or still go heavy

I'd give it a try. Stick with diff oils as they are now and wait until you drive it to change them.

Id reccomend picking up a direct drive pinion to compare it against. Try it with both the clutch and the pinion and decide what you like. I personally hate the clutch, but some like it. You wont know unless you try it.

Yes... If this is for the track just run the same diff fluids you would run for a nitro and go from there. Ususally its pretty darn close.