What is meant by designating thrust angle as being positive or negative?
The thrust line refers to the “aimed” direction of the rear axle. A positive thrust angle will try to steer the vehicle to the left, while a negative thrust angle will try to steer the vehicle to the right. This will cause the driver to pull the steering wheel right or left to compensate.
Can rear alignment cause a pull?
Poor camber and caster alignment can cause your vehicle to “pull”, and can cause tire tread to wear unevenly. Toe in won’t cause your vehicle to pull, but it can cause extremely fast tire tread wear.
What causes a thrust angle on a 4 wheel alignment?
The rear axle and associated componentry were jarred by an impact that created the angle. More commonly, with modern vehicles that have individual 4-wheel alignment adjustability, a thrust angle is caused by incorrect toe settings. Toe settings can become altered over time and during routine vehicle use.
Is the thrust line parallel to the centerline?
“The thrust line should run parallel to the vehicle’s geometric centerline.” Thrust angle is therefore a degree measurement of the angle off of this imaginary centerline between the front and rear axles of the vehicle.
Which is an example of thrust in a vehicle?
The concept of “thrust” is usually one that is associated with jet engines, rockets, and the like, not necessarily automobiles. But you can think of the vehicle acceleration and forward motion as a much less dramatic example of thrust. Tell us what you drive and we’ll show you all the best options.
How to tell if your car has an out of specification thrust angle?
If your vehicle is experiencing an out of specification thrust angle, drivability will be altered. The driver is likely to sense handling abnormalities like a pull in one direction, and/or different vehicle behavior when turning left and right. Also, a crooked steering wheel is a telltale sign of a thrust angle problem.