Well, this Transmission problem sounds like a very typical problem for "alot" of 2000 owners. About 2 months ago I started having a cutting out under partial accelleration and it has developed into a severe bog and engine shut off when trying to pass on the highway or accelerate around town. (Worse when the car gets warmed up) I took it to the dealer and they said it was misfiring because of bad coils, although it hadn't coded at all and the car wasnt missing, just boggin down under acceleration. Well after checking the internet and seeing all of the problems with the valve cover gaskets and the coil issue, I went ahead and changed the Valve cover gaskets, plugs and coil packs and it is no different. Then they said Mass Air sensor voltage didnt look right, so I changed it too. Still no difference!!!
I was just telling my wife tonight that I think the cutting out is related to the transmission and possibly the rev limiter on the car. So I started to search the net for LS and tranny problems. Well we are not alone!
My car acts as if the tranny is slipping and somehow engaging the rev limiter, then it floods itself and cuts out. (If you rev the car in park it will act the same way at 3000 rpm.) When I crank the car back up, it has run very poorly and actually produced a code. However, in order to clear it up to get the car to make it home, I disconnected the battery and let the computer reset and it will start and run fine and the codes are erased.
Well, while searching the internet today I have found numerous, numerous, numerous people with the same problem, but no definitive cure although I do believe the problem is definetly tranny related. My car doesnt miss a lick, and it pulls hard, when the it is cool and the problem isnt occurring. Well I guess after what I have read, I am simply going to have the fluid flushed and the pcm flashed to the newest updates and go trade it back to the dealer while the car is cooled off and not slipping. (Before I get stuck with paying $3,700 for a new tranny)
By the way my car only has 41,000 on it and has been out of warranty for 6 months. It was great until a few months ago and now I have been getting all of the common 2000 LS problems. The Dealers are making alot of money off of misdiagnosing these cars and there are far to many people that have spent thousands and still have the exact same problems they started with.
Sorry for the wordy post.