bhtooefr
Active Member
Transmission shifting performance, and transmission lubrication, are two different issues. Obviously the former is irrelevant to a Tesla.Dunno - while a company selling lubricants is not a particularly authoritative source:
Combat the Effects of Cold Temperatures
"Automatic transmissions can shift harder in the cold, but changes in transmission performance brought on by cold temperatures are usually more pronounced for drivers who operate manual transmissions. As transmission fluid thickens in the cold, the synchronizers in manual transmissions cannot spin as quickly as they need to, which can severely impact the driver’s ability to shift until the fluid is warmed enough to provide proper flow – and protection."
Plus a Tesla gearbox is much simpler than an automatic transmission.
Also, @Artful Dodger pointed out that the Tesla gearbox can be heated, so I guess my argument is moot from that angle as well.
That said, AFAIK, the bigger penalty would be efficiency, rather than wear, on cold lubricants. There'd be some initial wear from startup, but eventually lubricants will flow well enough to get where they need to be. (Not an expert, though.)
Automatic transmission hard shifting would be because automatic transmissions use the fluid to actually shift the elements within the transmission, so things respond slower than the designers intended, causing the shift to be delayed and not as smooth as it should be.