▁ ▁The ▁system ▁works ▁by ▁dro pping ▁the ▁sh if ter ▁down ▁into ▁a ▁g ated ▁area ▁on ▁the ▁shift ▁assembly ▁which ▁allows ▁the ▁sh if ter ▁to ▁be ▁pushed ▁to ▁the ▁right ▁( up - shift ) ▁or ▁to ▁the ▁left ▁( down - shift ). ▁When ▁the ▁driver ▁push es ▁the ▁sh if ter ▁in ▁either ▁of ▁these ▁directions ▁the ▁assembly ▁sends ▁a ▁signal ▁to ▁the ▁T CM ▁to ▁shift ▁up , ▁or ▁down ▁depending ▁on ▁the ▁driver ' s ▁actions . ▁Dro pping ▁the ▁sh if ter ▁into ▁the ▁Aut ost ick ▁gate ▁while ▁the ▁vehicle ▁is ▁moving ▁will ▁simply ▁keep ▁the ▁vehicle ▁in ▁the ▁current ▁g ear ▁selected . ▁ ▁For ▁the ▁column - shift ▁third - ▁and ▁fourth - gener ation ▁D odge ▁Grand ▁Car avan ▁ES , ▁Ch rys ler ▁Town ▁and ▁Country ▁ 1 9 9 9 – 2 0 0 3 , ▁four ▁speed ▁automatic ▁transmission ▁models ▁with ▁F WD ▁( 4 1 TE ) ▁or ▁A WD ▁( 4 1 AE ) ▁transmission ▁only . ▁The ▁Aut ost ick ▁feature ▁is ▁activ ated ▁by ▁moving ▁the ▁" PR ND L " ▁transmission ▁selection ▁on ▁the ▁ste ering ▁column ▁clock wise ▁past ▁D ▁where ▁L ▁is ▁usually ▁found . ▁When ▁selected ▁the ▁current ▁g ear ▁ratio ▁is ▁not ▁changed , ▁the ▁" Aut ost ick " ▁indicator ▁ill umin ates ▁in ▁the ▁instrument ▁cluster , ▁the ▁numbers ▁ 3 ▁ 2 ▁ 1 ▁ill uminate ▁to ▁the ▁right ▁of ▁D , ▁and ▁a ▁square ▁appears