Mind=blown. That's why. I always wondered why when you are behind a vehicle, primarily trucks and SUVs, and the vehicles side is right in your line of sight(as if you were checking a 2x4 for straightness) the vehicle always seems to be dog tracking. (A little sideways) like the frame was bent. I always thought it was my eyes since nearly every vehicle looked that way. But now it makes perfect sense.
Tyler/T-Unit
"Dog tracking" is a different issue. Thrust angle is wrong. Essentially, the rear axle is not in line with the chassis center line. Bent frame, shifted suspension, shifted axle, bent axle, etc.
Leaf spring solid rears are a major pita to align if it's not right. They should be within specs as a function of the way they are made. There's no easy adjustments available to the tech if it needs to move. IRS is a piece of cake (comparatively).
Most guys will simply adjust the front to the rear if the error is small and call it a day. This will often also give the "dog tracking" look.
It will no longer appear to "pull" to the driver and in normal driving they may never know. But the thrust angle is now out and can cause unintended handling issues when the vehicle is operating at the limits of its design (i.e.: emergency maneuvers, traction loss, etc).
hahaha
