Quote:
Originally Posted by ayao
Another trivia point - the 1M gearbox is the same as the N55 manual gearbox.
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It is AFTER the 1M gearbox with some sort of new coating on some parts. This piece of trivia has been used to say that there was no difference in the 1M gearbox. At the time it came out it was in fact different hence LT-5 required. Then they used it on all manual transmissions after that. Even 335i after that used LT-5. The whole point of the thread was that BMW came up with LT-5 because there was something different in the 1M gearbox then and people were putting Redline fluid that had been around for years. So it's safe to assume that they would not have been tested for the new coatings. Because of that, it seems like the safe thing was to stay with BMW LT-5. Perhaps now Redline has tested or adjusted their formulation to be safe with the coatings but back in 2011 it seemed risky.
Maybe now they meet all the BMW requirements but I doubt they did back in June 2011.