when i run a diffi in my 501 i use a durga diff and have never blown one
as for the rear diff there is a lot of bull talked about what to do
the answer is simple
use 501 outdrives
use 10 ceramic balls
2 steel balls 1 at 12 o clock and the other at 6 o clock ( this cleans the track and helps keep the diff smooth)
use only a minute amount of tamiya ball diff grease in the diff or the ceramic balls will slip causing heat build up
use tamiya anti wear grease in thrust race.
then cover sides if diff with a sticker or die cut covers
i ran half an outdoor season without a rebuild like this and only rebuilt then because i am anal about prep
i have never blown a tamiya diff building this way
ps this technique came from a trf works driver direct to me with no chinese wispers!!!
trust me it works
