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I was going to post a question about Redline D4 fluid because I have read mixed reviews on it- some say its fine, others say steer clear of it.
I have a 6AT 335xi at 70k miles and want to change the AT fluid and there is a level 2 transmission service kit on ECS tuning's website that I may try, unless people have had bad experiences with it.
Any insight is appreciated. Thanks people.
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