The other two measurements that are used for the car wheel alignment reading are the thrust angle and the steering axis inclination (SAI). The thrust angle is measured between the thrust line and the centerline of the car. A positive thrust angle is obtained when the thrust line lies on the right of the centerline and a negative value is obtained when the thrust line lies on the left. The thrust angle can affect the steering process and can lead to an imbalanced steering wheel. The proper setting of the toe alignment can avoid the problems of thrust angle.
All these measurements play an important role in the car tracking process and they need to set properly in order to have a pleasant driving experience. It is highly recommended to use the manufacturerâs settings or the settings that are proven to be working well on the cars. Although all the new vehicles are adjusted for the wheel alignment, there can be cases where the users may find some discomforts during the course of driving. There can be tire wears or drifts towards a particular direction as a result of the improper alignment. In such cases, the car wheel alignment reading or the car tracking needs to be revised with the automobile technicians.
The wheel alignment reading comprises of three measurements namely, the caster, the camber, and the toe. These measurements are used by the technicians in order to obtain the required alignment of the car wheels. Caster is the angle measured by tilting (either forward or backward) the steering axis at its uppermost point. The backward tilt has a positive value and the forward tilt has a negative value. The caster angle has the control over the steering direction and it is affected by the height of the vehicle. The value of caster is largely affected by the amount of load dumped in a car. The specified trim height needs to be maintained in order to retain the caster angle. On the whole, any alterations in the caster angle can affect the balanced driving of the car. The general range of caster angle will be anywhere between +2 to +5.5 degrees.
I was wondering if someone can read these wheel alignment readings for me and tell me how they look. I've noticed there was one number marked with black background square, so I guess that's the number they adjusted. They also wrote another (new) number with a pen right next to the one that's marked.
Originally Posted by ssh1979
So I was experiencing this "wheel pull" to the left on my new ride (2100 kms old). I could "feel" it often on the highways and sometimes within the city. The steering however is very responsive and "feeding back" amazingly.
It's the standard description for this kind of "issue": keep the steering straight and the vehicle pulls to your left. It was very slow, gradual for me but it was there.
I was thinking of waiting till the first service but it was still 3000 kms away. Since I was also preparing for a 1000 kms long trip this weekend, I thought I might as well get it checked out. So the SE at the Service Station took a ride (within city) and he was able to see the pull once or twice, his comment was that it's not an issue and everything was OK. There was also no stretch of road where we could do a longer drive at a higher speed. We returned to the SS where the Service Manager very kindly offered to take the vehicle up the platform and check the wheel alignment readings. Since the numbers came up in "green", he assured me again everything was alright and said we can do a checkup if required during the first service.
I've produced a snapshot of the reading below. I'm assuming here the Specified Range is Ford Endeavour standards as set by Ford. I can see the numbers for the Left Front are, well, not the same or near the Right Front values. Can some experts comment on these readings and if I should be worried and take any further action?