1988 jeep cherokee lorado 4 door 4x4...4.0 6cylender..... needs rear end gear oil..but it calls for 2 different kinds depending on weather or not you have the towing package..how can i tell if i have the towing package so i can get the right gear oil.

You can use the oil for the towing package in either rear end, but what they want to know is if the rear end is posi track. to find out jack up the back of the jeep put the transmission in neutral and turn one of the rear wheel if the wheel on the other side turns in the same direction that you are turning the wheel then you have posi track if the wheel on the other side turns backwards the you don't. but like i said you can use the towing oil in either rear end when in dought use the towing oil.