Join Date: Sep 2003
Location: Northern VA, USA
I would recommend draining and replace the ATF & filter. If you are concerned about replacing even more fluid, since draining only removes about half of the volume, then I would replace the ATF twice over a couple a days. This will replace the fluid by dilution. Not the best way but not too bad either. Removing the tranny pan also reveals how much metal has worn away and you get to clean the magnet, and you can replace the filter.
A T25 Torx Hex wrench/bit is needed for the filter removal (at least for ZJs)
If I am using a cork or rubber gasket I do not RTV on it because I install the bolts with a torque wrench (150 in-lbs) But many people use a small bead on the pan side only. Currently I am using a ridge type rubber encapsulate metal gasket. This can be removed and reused a couple times, so never use RTV on this type.
WalMart sells Mopar +4 AFT for $ 4.42/qt
The tranz filter at the dealer is about $ 6
94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new
88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new