Driving on GradesReduce speed and shift to a lower gear before you startdown a long or steep downgrade. If you do not shiftdown, you might have to use your brakes so much thatthey would get hot and no longer work well.Climbing grades steeper than four percent attemperatures above 90° F (32° C) with a loaded vehicleand trailer is not recommended. The cooling systemmay temporarily overheat. See Engine Overheating onpage 5-31.Parking on Hills{CAUTION:You really should not park your vehicle, with atrailer attached, on a hill. If something goeswrong, your rig could start to move. Peoplecan be injured, and both your vehicle and thetrailer can be damaged.But if you ever have to park your rig on a hill, here ishow to do it:1. Apply your regular brakes, but do not shift intoPARK (P). When parking uphill, turn the wheelsaway from the curb. When parking downhill, turn thewheels into the curb.2. Have someone place chocks behind thetrailer wheels.3. When the wheel chocks are in place, release theregular brakes until the chocks absorb the load.4. Reapply the regular brakes. Then shift intoPARK (P) firmly and apply your parking brake.5. Release the regular brakes.4-45
