The Tesla LDU requires a quality grade ATF; the GM Dexron VI is spec'd, but it a very simple set of gears and any lubricant meeting the Dexron VI spec will work. I used one of the AMSOil versions. I believe it's a 50k R&R, but there's a big honkin' magnet inside (as well as a magnet on the drain plug), and there's little heating of the fluid, so it doesn't get contaminated nor heat-aged as it would in a conventional transmission. IIRC, it's less than two quarts capacity.