Alot of this work is going to depend on how much you are comfortable doing. If some of our 4x4wire peeps were closer to lend a hand that would help out more than online diagnosis. It would be helpful to get a breaker bar with a socket for the crank and turn the crank to feel and hear for any interference. That and the advice given you should give you a direction.

91 Montero LS "Sandstorm", Auto, Dual Bouncy Seats, 2" Suspension lift, 2" Body Lift, GENII front IFS, 32" MT tires

89 Raider "Trailbreaker", 3.0, Auto, Dual Bouncy Seats