Quote:
Originally Posted by qatmix
On Tc Gear diffs are for the Mod racer running on large sweeping tracks at 65mph.
I tried one in my car and Its almost like a spool, I could muck about with different oils but a ball diff is much easier to tune (a slight twist on the screw) And if you make a ball diff properly they last for ages before maintenance on 10.5 or less.
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That's also something to bring into the equation.
High power brushless motors is what starts this problem. I remember running the TC3 in modified, and on a hot summer day with a 12 turn(european limit), I got about 6-8 packs of running through the original diff with plastic outdrives. And I remember the power as very good, it spun all four of my Sorex 36, fully sauced and heated.
Try that diff now with a 3.5-5.5 turn, and you've come to a dead stop in probably two minutes....
I run an 8,5 turn in my 2wd, and my diffs last for 2-3 practice days on carpet. That is usually around 900 laps with high grip, and outdoors they last a lot longer.
What I have figured out is that your balls and rings should match. I tried running ceramic balls, and they're great. Never wear them. But the rings get crappy in half the time because all the wear is on the rings, so the overall value of using ceramic balls is low.