RAM 1500 Owner's Manual page 697

When changing a front wheel, place the scissor jack
under the rear portion of the lower control arm as shown
below.
4X4 Front Jacking Location
WHAT TO DO IN EMERGENCIES 695
4x2 and 4x4 Rear Jacking Location
Operate the jack using the jack drive tube and the wheel
wrench. The tube extension may be used but is not
required.
For 4x2 and 4x4 trucks, when changing a rear wheel,
assemble the jack drive tube to the jack and connect the
drive tube to the extension tube. Place the jack under the
axle between the wheel and the shock bracket with the
drive tubes extending to the rear.
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