Both are correct. The A604 was the code given to the Ultradrive transmissions. 41TE refers to: 4 speed; 1 (the level of the torque converter strength); and the fact that it's transversely mounted. Interesting to note is the fact that Chrysler chose to save a couple of dollars and made an even weaker version in the 2003 Neons and PTs, the 40TE (the 0 referring to the weaker torque converter). But the PT Cruiser turbos came with the 41TE, but with several revisions, making it a great option for our cars. I've read on Allpar that the later versions of the A604 went past the 275,000 mile mark with only a solenoid replacement (and fluid and filter changes). Hope that helps.

www.allpar.com/mopar/transmissions/41TE.html

EDIT: After posting, I realized the date of the original post. Sorry about that. Lol!