If my memory does not fail me, the A/T dipstick was a special dealer-installed option on 2000+ Troopers, a part of the big "4x4 Dream Package". That package included selectable lockers on both axles, 4.77 ratios, 33" tires, a turbocharger, a snorkel and some others goodies (like tranny dipstick, top-mounted alternator, 32 gallons gas tank etc).

Oleg
Axiom 4WD 2004: OME shocks, 32" BFG Mudders, RockSliderz, OME929+2" spacers, Stinkyfab bent RE rear links, front ARB locker, rear No-Slip locker, DOR front axle lowering kit, custom middle section skid plate, IronMan torsion bars.
Deceased Rodeo'02 4WD.