I out the passion gear oil in one and it went from smooth shifting to grinding. Drained it immediately. Old lube hadn’t been changed by me and came out with some moisture even. So I thought I’d done good until first drive. I put 85w-140 in and it was back to being business as usual. I mentioned this before on here and somebody said that meant the trans was worn out if it wouldn’t shift right with the passion juice. That might’ve been, but I wasn’t doing a tear down of a good working trans so I could run a certain type of gear oil.