You should all know that using ANY Dexron/Mercon fluid is not recomended, and has shown to lead to transmission failure.
MOPAR ATF +3 is the factory fluid in all first generation LHs, and even earily 2nd gens. But, MOPAR has made a new fluid called ATF +4. Chrysler has posted a TSB saying that ATF +4 should be used now.
If you do switch to ATF +4, you must reset the TCM. Otherwise your shifts will become sloppy (which is why you may come accross threads saying that problems arose after they switched). The TCM can be reset by disconnecting the battery for 15min or more. After reconnection, take the car out driving how you normally drive. The TCM will do a learning procedure and adjust itself to the new fluid, and your driving.
Here is the TSB:
DATE: Jun. 29, 2001
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 21-16-99, DATED OCTOBER 22, 1999, WHICH SHOULD BE REMOVED FROM YOUR FILES AND NOTED IN THE 1999 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO. 81-699-00004). THIS IS A COMPLETE REVISION AND NO ASTERISKS HAVE BEEN ADDED TO HIGHLIGHT REVISIONS.
Automatic Transmission Fluid Usage ATF+4 (Type 9602)
1989 - 1995 (AA) Spirit/Acclaim/Lebaron Sedan
1989 - 2002 (AB) Ram Van/Wagon
1989 - 1993 (AC) Dynasty/New Yorker/New Yorker Salon
1989 - 1993 (AD) Ram Truck
1989 - 1994 (AG) Daytona
1989 (AH) Lancer/Lebaron GTS
1989 - 1995 (AJ) Lebaron Coupe/Lebaron Convertible
1989 - 1990 (AK) Aries/Reliant
1989 - 1990 (AL) Horizon/Omni
1989 (AM) Diplomat/Gran Fury/New Yorker Fifth Avenue
1989 - 2002 (AN) Dakota
1989 - 1994 (AP) Shadow/Sundance
1990 - 1991 (AQ) Maserati
1990 - 1993 (AY) Imperial/New Yorker Fifth Avenue
1994 - 2002 (BR/BE) Ram Truck
1998 - 2002 (DN) Durango
2002 (DR) Ram Truck
1995 - 2000 (FJ) Sebring/Avenger/Talon
2000 (GS) Chrysler Voyager (International Market)
1995 - 2000 (JA) Cirrus/Stratus/Breeze
2001 - 2002 (JR) Sebring Sedan & Convertible/Stratus Sedan
1996 - 2000 (JX) Sebring Convertible
2002 (KJ) Liberty
1993 - 2002 (LH) Concorde/Intrepid/Vision/LHS/New
1989 - 1992 (MJ) Commanche
2000 (NS) Town & Country/Caravan/Voyager
1995 - 2002 (PL) Neon
2002 (PG) PT Cruiser (International Markets)
2001 - 2002 (PT) PT Cruiser
1997 - 2002 (PR
2001 - 2002 (RG) Chrysler Voyager (International Markets)
2001 - 2002 (RS) Town & Country/Caravan/Voyager
1997 - 2002 (TJ) Wrangler
2001 - 2002 (WG) Grand Cherokee (International Markets)
1999 - 2002 (WJ) Grand Cherokee
1989 - 1995 (YJ) Wrangler
1996 - 1998 (ZG) Grand Cherokee (International Markets)
1993 - 1998 (ZJ) Grand Cherokee/Grand Wagoneer
NOTE :THIS BULLETIN APPLIES TO ALL VEHICLES EQUIPPED WITH CHRYSLER AUTOMATIC TRANSMISSIONS EXCEPT 1999 AND EARLIER MINIVANS.
A new transmission fluid (ATF+4(R) - Type 9602) has been developed and is being used as factory fill for all vehicles with Chrysler automatic transmissions. Until now, vehicles originally filled with ATF+2 or ATF+3 were to be serviced with ATF+3. Effective immediately, it is recommended that all vehicles with Chrysler automatic transmissions except for 1999 and earlier minivans be serviced with ATF+4(R). ATF+3 should continue to be used for 1999 and earlier minivans because of the potential for torque converter shudder during break in. For all other applications the ATF+4(R) fluid offers significant benefits as outlined below.
NOTE :ATF+4(R) MUST ALWAYS BE USED IN VEHICLES THAT WERE ORIGINALLY FILLED WITH ATF+4(R).
NOTE :SERVICE INTERVALS DO NOT CHANGE. THE SERVICE INTERVAL CURRENTLY IN EFFECT FOR A GIVEN VEHICLE SHOULD CONTINUE TO BE FOLLOWED.
NOTE :ATF+4(R) IS COMPATIBLE WITH ATF+3 AND CAN BE USED TO TOP OFF VEHICLES THAT CURRENTLY HAVE ATF+2 OR ATF+3. DO NOT USE ATF+2 OR ATF+3 TO TOP OFF VEHICLES THAT HAVE ATF+4(R) FLUID.
^ Better anti-wear properties
^ Improved rust/corrosion prevention
^ Controls oxidation
^ Eliminates deposits
^ Controls friction
^ Retains anti-foaming properties
^ Superior properties for low temperature operation
Mopar ATF+4(R) is a World Class Fluid having exceptional durability. However, the red dye used in ATF+4°R is not permanent; as the fluid ages it may become darker or appear brown in color. ATF+4(R) also has a unique odor that may change with age. With ATF+4(R) fluid, color and odor are no longer indicators of fluid condition and do not support a fluid change.