Hotchkis 1811 1994-1996 Impala SS X-Tend Rear Suspension - Manual (Page 12)

SETTING PINION ANGLE
It may be necessary to set pinion angle after installation of your new Hotchkis upper trailing
arms.
First of all, what is pinion angle? Pinion angle is basically the angle between the centerline of
the differential pinion and the drive shaft centerline. This angle changes during acceleration and
braking. If the pinion angle is excessive, then vibration and increased U-joint wear will occur.
The Hotchkis double adjustable trailing arms allow you to adjust the pinion angle with ease.
Simply loosen the two jam nuts and rotate the aluminum turnbuckle to lengthen or shorten the
arm. So, how does one set the pinion angle?