Quote:
Originally Posted by Clavurion
I would still do the oil change by flushing the whole content especially if you are going to Dexron VI which is also compatible and has better wear abilities. This can be done if you have the vehicle on stands. Personally I think these myths about dangerous oil changes are mainly based on cases where someone has tried to rectify an already faulty gearbox with an oil change or the oil change was done wrong and there was too little oil in the sump (not filled while engine running).
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I agree. My N62 was leaking at 16 years, with only 40k miles, at the mechatronic sleeve. I was experiencing some harsh shifts out of first gear.
I replaced the sleeve with my mechanic friend and we did three drain and fills with Valvoline MaxLife. It shifts great now and I hope I caught it before the low ATF due to the leak caused serious damage. The original fluid looked good. We decided to drain and fill it anyway. ZF recommends a maximum of six or eight years on the life of the fluid, I forget which. BMW says lifetime which has worked for some too.