Focus on Tasmania - Four Wheel Driving Tips.

TIPS FOR
4-WHEEL
DRIVING

It is a good idea to use 4-wheel drive when off graded tracks.
When conditions appear difficult, don't drive. Survey the area on foot - this will help you find the best path.
Before attempting a difficult section, select a gear and stay in it - a low range second gear is usually adequate.
When negotiating slopes, keep the use of the clutch and brake to a minimum - this reduces your chances of sliding and losing control of the vehicle.
When descending steep slopes, use first gear low range - braking should be provided by the engine. Apply the accelerator carefully - you may cause the wheels to spin.
Avoid existing deep wheel ruts and obstacles which may not be cleared by the chassis. Be aware of the need to maintain ground clearance.
If you get stuck because of no wheel grip, avoid wheel spin- it will only make matters worse.
If the ground is soft reduce the tyre pressure to minimum and clear clogged tyre treads.
Reverse as far as possible.
Material like sacking, if placed in front of the tyres, will help give more tyre grip. If necessary, jack up the vehicle and place the material under the wheels.

Bouncing the vehicle may give additional help.