Ihave a1992 explorer the trani acts like its going out for acouple of months but after you drive ti for acouple of miles itll start shifting & the transfer case acts like its going to engage but wont & the 4x4 light wont come on & after the trani starts to shift when on the hiway it starts jumping like to be caught inbetween od & d ? the trani I had before just went out no warning can someone help ?