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Thanks to all. I've decided to change it out by draining / refilling 2X. First will be with Dextron VI, and 2nd will be to use the originally intended Liqui Moly 1800 (which I understand is identical, or nearly so).

I brought the indy two trans maintenance kits and they used the ATF from the wrong one. The problem with a guaranty is trans issues caused by a similar ATF, it it comes to be, won't be for many moons. The problem with a drain and fill is it will be partial. So, double drain and fill, then hold...

I didn't do it myself. It was done by my indi. Most folks here seem to say the two fluids are similar enough that concern isn't warranted.

The ZFLG8 went in. Recommended was LM 1800.

Changing fluids without clear reason could be worse than the problem itself. First, what's the problem? To answer that, we have to know the difference between the two fluids, which I've heard is minimal. Second, we should know what technique would be used for the exchange (drain and fill 1X, or...

The ZF LG8 went in. That's the issue. (If there is one ...)

By "nothing bad will happen" if I leave the ZF ATF within, are you saying the ZF and LM are compatible? Are they both synthetic and do they have the same viscosity? Thanks you. Vic

Greetings enthusiasts and experts, ZF Lifeguard Fluid 8 was inadvertently used for an initial trans maintenance service at 103k mi via pan drop / fluid refill on my 2011 BMW E90 328i xdrive. This vehicle has the GM 6l45 trans. The fluid which came with the kit and should have gone in was Liqui...