Per TSB 21-16-99, the transition to ATF+4 (Chrsyler Spec 9602) at the factoryWell if you Google this newsgroup, you will find a HUGE debate about
various fluid types and additives.
However, if I recall correctly, the ATF+3 is for use in chysler
transmissions built prior to 1996? (or is that 1998?)
But anything after that (incl. 2000 model year) the specified fluid is
took place at the following dates and serial numbers for each body type:
**GS** **AFTER NOVEMBER 8, 1999 (MDH1108XX)**
JA AFTER SEPTEMBER 7, 1998 (MDH0907XX)
**JX** **AFTER MAY 21, 1999 (MDH0521XX)**
LH AFTER JULY 20, 1998 (MDH0720XX)
**NS** **AFTER OCTOBER 10, 1999 (MDH1010XX) WINDSOR ASSY PLANT**
**AFTER OCTOBER 18, 1999 (MDH1018XX) ST LOUIS ASSY PLANT**
11TH POSITION OF VIN - R = WINDSOR/B = ST LOUIS
**PL** **AFTER APRIL 24, 1999 (MDH0424XX)**
PR AFTER JULY 20, 1998 (MDH0720XX)
Another TSB specifies which earlier vehicles can/should be switched to ATF+4.
IIRC, it was all Chrysler vehicles except certain minivans, although that
exception may no longer be in effect.