72-74 4x4s are part-time 4wd and have front DRUM brakes, '75-79 are FULLTIME 4wd and have front DISC brakes.
'75-up much better than '72-74, newer dash, many mechanical updates as well as NP203 cast-iron Fulltime 4wd transfer case.
Good luck!
JS
76 Dodge Adventurer Sport Power Wagon W100 318, 727, NP203 Fulltime 4x4 Russet Red
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06 Chrysler 300C AWD 5.7L Hemi
10 Mopar 10 Challenger R/T, #483/500, 5.7L HEMI
10 Jeep Grand Cherokee Ltd 4x4 5.7L HEMI
11 Dodge Ram 1500 LoneStar Quad Cab, 5.7L HEMI, Fulltime 4x4, Deep Cherry Red
16 Jeep Cherokee Limited 3.2L Pentastar V6, 9 Speed Torqueflite, 4x4, Black
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