The Suspent Actor Varible would represent the Wheel, the Base is the actual Car the Wheel is suspendet on and the Rotation Speed Vector is to control the Axis the Torque is applied to. You can change it to any Speed by changing the Number, or change the Axis by changing the Vector to X Y or Z. You can also do this : X = 20000, Y=20000. This will applie the Torque in a 45 Degree angle between the X and Y Axis. You can adjust the angle by setting the Numbers in different Ratios. For Example : X = 90000, Y = 10000. That would give it an approximate 9° Angle. Hope this helped you 
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