Very important change for late 1985 - the positions of 'Jeep' and 'Cherokee' badges were swapped. 1984 and early 85 have Cherokee on the liftgate and Jeep on the lower right quarter of the trunk, this was vice-versa from late 1985 onwards, hence why you rarely see any Cherokees with the model name on the lift gate.

And in the latter half of the 1987 model year the Chiefs got new cladding.
1984-87.5: http://www.2040-cars.com/_content/cars/images/29/972829/001.jpg
1987.5-1990: http://www.2040-cars.com/_content/cars/images/33/900933/001.jpg