Check all the main cables, battery -> solenoid -> starter motor -> ground ->battery.
Make sure all the connections are clean and tight. What you're experiencing could be something as simple as one of those connections becoming loose over time, or corroded.
Four wheel drive allows you to get stuck
in places even more inaccessible.
62 88 Regular
67 109 6cyl NADA x2
74 Lightweight - The Antichrist
95 DI 5-speed
95 D90 5-speed
97 D1 Automatic