As a practical matter, there is no such thing as a "lifetime transmission fluid". The transmission includes wear items such as clutches, and wear material will accumulate and eventually begin to degrade the lubrication qualities of the fluid. ATF is hygroscopic, and will absorb water and moisture. Also, the additive package in the fluid will become depleted, so that it no longer will provide the same protection as new fluid.I am confused...if it is not listed in the owners manual w/ maint schedule....should I never service the transmission? or should I still do a service around 60K? why wouldnt they list it in the owners manual?
There are a number of reasons why Chrysler, or any other manufacturer, would not encourage you to service your transmission. One is a desire to make it look as if their cars require less service than a competitor's. Another would be that no manufacturer wants their cars to last forever. In fact, most manufacturers practice de-engineering; if a component lasts longer than what they consider to be its "service life", they work to make it lighter and cheaper so that it doesn't last as long.
You can do as you like, but as I mentioned upthread, I like to do a filter and partial transmission fluid change at least every 50,000 miles or so. When you drop the pan and refill, you're only changing about a third of the fluid. If you wait until 80 or 100,000 miles, chances are the fluid will be contaminated and in poor condition, meaning that you should really flush it all out and replace all of it with fresh fluid. That's a much more involved procedure, which is why I'd rather do a pan drop every 50k or sooner.