I did it too. No wonders so far.
Ok, here it is - just got back from the dealership and I'm now a happy owner of the TCM software upgrade. Well, I'm not sure how happy I am really, but they did it. When I got to the dealership I told them that once in a while transmission flares and throttle response is lagging. It took me 2 hours of waiting time (actual labor time was 1 hour) and they put 8 miles on the car while I was waiting (I assume trying to verify the simptoms - which they said they didn't). After all, they upgraded software and did it under warranty.
After driving it from the dealer I can tell that it is not really much different. There is slight improvement in the throttle lag (subjectively - 30%), but it is still there. I didn't notice any change in how quick the tranny shifts or in flaring (I experienced it only once or twice before). So I guess it is just knowing that I have latest and greatest is worth the trouble of driving to the dealer.
What is interesring is that when I described to the guy at the counter the simptoms I said: "...a second delay in the throttle response" He put down: " ...a minute delay". ...funny... When they were done he repeated: " You said you had a minute dealy and according to Volvo it is a normal throttle response" I guess if you can't (or don't want) to change something you can justify just about anything. I work in electronics engineering and in our circles this policy is known as 'if you cant fix something put it down as a feature'. I wonder how you market something like that: " The longest delay in throttle response on the market! None of the competitors come even close! Best neck snapping action when it finally kicks in' I guess it will work as long as it is said by one of those guys with low trusty voices.
Anyhow, P/N for the upgrade is 30677036. Bottom line was $46.40 which was covered under warranty (my XC was manufactured in 12/03)
Just got the update, works like champ.
As posted earlier, we had been having problems with our 2002 XC that we have just purchased under "certified preowner" program. The transmission takes a very long time to shift from N to D, and shifts in two phases. If you release you foot from the brake too early (before the second engagement) there is a loud clunk. It also flares sometimes, when you take your foot off the gas, and then resume accelerating.
Took it to the dealer wondering what we'd be in for. They updated the software (no charge) and all is well. Transmission works fine now.
Welcome to the new automotive world, what's next, software viruses, trojan horses, etc.? I'm glad I didn't buy a Microsoft car.
Perhaps I shouldn't have suggested that.....
Scott.