1996 Ford F150 Owner's Manual - Page 202

After driving through mud, clean off residue stuck to rotating driveshafts and tires. Excess mud stuck on tires and rotating driveshafts causes an imbalance which could damage drive components. NOTE: If the transmission and transfer case is submerged in water, their fluids should be checked and changed, if necessary. NOTE: Refer to the Diesel Engine Owner's Guide Supplement for driving through deep water information. Additional Special Driving Instructions for 4-Wheel Drive Vehicle Operators Driving on Hill or Slope Terrain When driving on a hill, it may be necessary to travel diagonally up or down. Avoid driving crosswise or turning on steep slopes, you could lose traction and slip sideways. Drive straight up, straight down or avoid the hill completely. Know the conditions on the other side of a hill before driving over the crest. When climbing a steep hill, start in a lower gear, rather than finding it necessary to downshift from a higher gear after the ascent has started. This reduces strain on the engine and the possibility of stalling. When descending a steep hill avoid sudden braking. Rapid pumping of the brake pedal will help slow the vehicle and still maintain steering control. 200