2008 Jeep Wrangler Owner's Manual - Page 301
2008 Jeep Wrangler Manual
Page 301 highlights
300 STARTING AND OPERATING CAUTION! Never attempt to straddle a rock that is large enough to strike your axles or undercarriage. CAUTION! Never attempt to drive over a rock which is large enough to contact the door sills. Crossing A Ravine, Gully, Ditch, Washout Or Rut When crossing a ravine, gully, ditch, washout or a large rut, the angled approach is the key to maintaining your vehicle's mobility. Approach these obstacles at a 45degree angle and let each tire go through the obstacle independently. You need to use caution when crossing large obstacles with steep sides. Do not attempt to cross any large obstacle with steep sides at an angle great enough to put the vehicle at risk of a rollover. If you get caught in a rut, dig a small trench to the right or left at a 45-degree angle ahead of the front tires. Use the removed dirt to fill the rut ahead of the turnout you just created. You should now be able to drive out following the trench you just created at a 45-degree angle. WARNING! There is an increased risk of rollover when crossing an obstacle, at any angle, with steep sides. Crossing Logs To cross a log, approach it at a slight angle (approximately 10 to 15 degrees). This allows one front tire to be on top of the log while the other just starts to climb the log. While climbing the log, modulate your brake and