GioB

Fluid changes are due but no way its an open diff leaving two distinct ruts. Tested it multiple times after seeing the O2A code on the door sticker and I'm convinced that code must be for something else. Could also be that the code doesn't apply to Canadian market vehicles since SUVs sent here usually are only available in higher traction package levels.

Beg to differ. I just bought an AWD 99 RX300 with 80,000 kms and was curious about this as well. Door sticker code is O2A on mine but I can tell you with 100% certainty that it's not an open diff on the rear end. I've taken it off road a couple of times already to test it and put the gas pedal all the way down from a standstill on anything but dry pavement and I leave two distinct gouges in the dirt from the rear wheels. Definitely a positive rear end on mine, so I don't think the O2A code has anything to do with the rear diff.

That's bs about the code. I have a 99 rx300 that I bought about a month ago and I too was curious if it has the posi. Was disappointed when I ran across this post and saw that mine has the 2A code on the door sticker, until I checked it today on a gravel road, floored it from a stand still and guess what? The rear tires dug two holes.