The only difference in them is the speedo gears in them. Your speedo won't read right, if you swap a tcase in from a trackick that had different axle gears than your current one (if the tcase is from a 4 door with the auto, then it would have had 5.12 axle gears, which is what your 5 speed trackick likely has).
That is also assuming your trackick is an 89-95 (89-95 trackick tcases have a 26 spline rear output shaft....96 and up tcases have a 16 spline rear output shaft).