powersurge wrote:I am sorry, but there is no need to change transmission fluid "after break-in". There is no break-in period, as it is an electric motor, with no heat for wear.
As per Nissan, there is no need to change the fluid...... My feeling is to change just like ICE vehicles, at 30-40K miles. The Fluid does not sludge up, you just need to remove the contaminants...
Yup, that's where I've landed, too. I'll change it at 30k. Which is probably plenty early. Anecdote: I changed the factory ATF in a 2006 Prius at 155k miles. There's more going on with in the planetary gearset CVT than there is in the Leaf reduction gear and that car is still going strong with its new owners (friends) three years and 30k+ miles later.
As for break-in, I think that can apply generally to machined parts, not just ones that see a significant thermal cycle. With the larger ferrous bits caught by the magnet, I'm guessing there's little to no harm to the bearings. If there were, I'm guessing Nissan would have specified a replacement interval, as there is for coolant (125k or 15 years).