yotatoy

i have an 03 WJ aith quadradriveII. i hate it. i go snowshoeing and skiing and i cant get half the places i want to go because the font end dosent stay locked in. so i am wondering if a NV242 t-case will bolt up to the trans and how much modification will the shift linkage need. also if the output shaft speed sensors will fit. or is this not a practical solution? if anybody else has any ideas it would be greatly appreciated