Will not hurt anything to change the fluid and filter earlier than the recommended 60k miles interval.
How to check the transmission fluid level;
1. Verify that the vehicle is parked on a level surface.
2. Remove the dipstick tube cap.
WARNING: There is a risk of accident from vehicle starting off by itself when engine running. There is a risk of injury from contusions and burns if you insert your hands into the engine when it is started or when it is running. Secure vehicle to prevent it from moving off by itself. Wear properly fastened and close-fitting work clothes. Do not touch hot or rotating parts.
3. Actuate the service brake. Start engine and let it run at idle speed in selector lever position "P".
4. Shift through the transmission modes several times with the vehicle stationary and the engine idling
5. Warm up the transmission, wait at least 2 minutes and check the oil level with the engine running. Push the Oil Dipstick 9336 into transmission fill tube until the dipstick tip contacts the oil pan and pull out again, read off oil level, repeat if necessary.
NOTE: The dipstick will protrude from the fill tube when installed.
6. Check transmission oil temperature using the appropriate scan tool
7. The transmission Oil Dipstick 9336 has indicator marks every 10mm. Determine the height of the oil level on the dipstick and using the height, the transmission temperature, and the Transmission Fluid Graph, determine if the transmission oil level is correct.
8. Add or remove oil as necessary and recheck the oil level.
9. Once the oil level is correct, install the dipstick tube cap.
There is a special dipstick you can buy thats used just to check fluid level. Chrysler uses a starscan and the special dipstick to check fluid level. The fluisd is supposed to reach a certain temperature before you take a reading. Here is one of the dipsticks you can buy, there are other companies; Chrysler uses Miller tools,:
Assenmacher AH CRY933 Automatic Transmission Dipstick | Engine, Trans., and Driveline Tools