I will be installing Steeda fixed lower control arms and an adjustable Upper control arm. What is the proper way to measure pinion angle on these cars with a one piece driveshaft?
i am finishing my write up for an adjustable UCA, and highlighted this procedure. i will copy/paste some of that write up here.
Step 18. Now it is time to check the pinion angle. This step is different for one and two-piece drive shafts. Both methods are covered below. BEFORE STARTING, jounce the car to let the suspension settle. (jounce: verb. move up and down repeatedly.)
FACTORY TWO-PIECE DRIVE SHAFT: Use your magnetic angle finder and attach it to the FRONT drive shaft. Record the front drive shaft angle. Next, attach the angle finder to the pinion flange. Record the angle. Subtract the pinion flange angle front the front drive shaft angle to get your net pinion angle.
AFTERMARKET ONE PIECE DRIVESHAFT: Use your magnetic angle finder and attach it to the transmission bell housing at the mounting surface to the engine. Record your angle. Then take your recording for the pinion flange. Subtract the pinion flange angle from the transmission reading to get your net pinion angle.