It seems there's a consensus that Redline Shockproof is the stuff to use in the V11 bevel box, and so I was all set to get me some when I came across the following exchange (coughed up by Google, of course).
Any thoughts, anyone?
The URL: http://www.mazdas247.com/forum/showthread.php?t=123703910
DO NOT use redline shockproof unless you change your trans oil every 3 weeks.
Just wondering, why you say that ? i´ve using my Redline Shockproof Synchromesh in my car for the past 2 years, with no problems of any kind..
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Shockproof works like this:
There's tiny chunks of calcium in the fluid, hence it's "milky" appearance. Under load, they get in betwen the gears and as they're crushed they absorb the force by breaking into smaller chunks. Shockproof fluid is nothing new, it's been a drag racer's dream for decades. But what happens in a street car, is that once all those chunks are broken up (it doesn't take long either, maybe 3,000 Miles at MOST) you're basically left with horse piss for gear oil. It's awesome stuff, but it has it's place. It's place is in a drag car that gets launched hard, and launched hard often. In a street car, it's garbage. The MT-90 is a 75W90 fully synthetic gear oil, and is perfect for a street car. Switch to that.