My 1993 Trooper was purchased used in Ecuador and without owner's manual. Shifting into 4WD works flawlessly. However returning to 2WD creates a "spinning gear or bearing sound" when decelerating. Four or more attempts to shift to 2WD usually makes the sound go away. What is the proper procedure for shifting to 2WD? ie; rolling 5mph, clutch no clutch, complete stop.