[pcmos]

I have no idea what this issue with the rough tranny shifts may be, I had the exact same problem with my 1992 LeSabre after it had around 200k miles on it, but my 2000 came with this problem when I purchased it as a pre-owned a few months ago.

The whine sound coming from the engine on mine seems to be related to the EGR system and I think it may be a vacuum whistle coming from the EGR assembly near the front of the engine, I can reproduce it to some extent by simply revving the engine in the driveway a few times under the hood.

So far I don't seem to have and oil consumption problem however I know GM has had serious issues with the EGR port on the plastic intake manifold and you may want to check your coolant level as well to make sure that it hasn't dropped in conjunction with the poor combustion/oil consumption.

If you read this message and you do find out what the problem with the tranny is, please post an update, I'll do the same, I have an extended GM bumper to bumper on this car and I am just going to annoy the heck out of every dealer I can find until they fix the stupid thing. It is a very annoying problem and it is probably something simple. From what I have read on the internet I really don't think this is a mount problem as I had originally hoped.