But then I found this.. http://www.allpar.com/fix/trans.html
""Is ATF+4 suitable for all Chrysler cars or just a few? (and Jeep exception)
This is from the Center for Quality Assurance site (as of July 24, 2008): “ATF+4® is approved for use in older transmissions and is currently utilized in newer Chrysler®, Jeep® and Dodge® vehicles. The previous MOPAR ATF+3® formulation was discontinued in 2005 and ATF+4® is recommended for all transmissions filled with ATF+3®.”
There is an important exception for Jeep owners. As Danny noted, "The Jeep AW-4 (Aisin-Warner) transmission should use Dexron III." Greg, a DCX tech, wrote that the AW4/AX4 transmission was used on 6-cylinder Jeep Cherokees through the end of production, and on the first six-cylinder 1993 Grand Cherokees (built in 1992 and 1993), but on the Grand Cherokee it was phased out midway through the 1993 model year. This transmission requires Dexron, while the 42RE / A500SE which replaced the Aisin-Warner transmission midway in the 1993 model year needs ATF+4. Again, if you are confused, you may just want to try one of the new universal fluids that is both Dexron and ATF+4 compatible.""