To do this, you "split" the drive shaft angle between the two u-joints. Example: A short coupled driveshaft with a 15" length would be limited to 3 degrees maximum operating angle. This is more expensive but will fix any angle problem. https://spicerparts.com/videos/measuring-driveline-operating-angles Many people mistakenly believe that a double cardan or C.V. type drive shaft will allow for greater operating angles than a conventional 2 joint or single cardan drive shaft. You DO NOT, I repeat DO NOT want to run a drive shaft at any where near this angle. Drive Shaft Rotational Velocity As the angle of the joint changes you can see how the velocity changes. Here is guide to checking the relative angle between the centerline of the pinion gear in the rearend and the center line of the driveshaft. It is not symmetric! This is the only situation where you don’t try to set the pinion and equal but opposite to the transmission angle. This is known as pinion angle. You need to allow for axle droop, frame flexing and differential roll. Setting the pinion angle is the final step in driveline alignment. The pinion angle should follow the driveshaft with double carden driveshafts…. What: Solving the problem of driveline vibration. Pinion angle is important due to the forces at work in the rearend and rear suspension of a rearwheel drive … Pinion Angle Measurement. Drive Shaft Harmonics DRIVELINE/UNIVERSAL JOINT CANCELLATION. Most drive shafts will, depending on components used, incur a binding interference at about 30 degrees. When the transmission output shaft centerline and axle input shaft centerline are parallel, the u-joint operating angle permissible is length of driveshaft divided by five. I have seen vehicles use a constant-velocity joint at each end of the driveline. This setup has the advantage of a lesser operating angle on the u-joints (5° vs. 10° in this case). Understanding Driveshaft Angle … Try to set the transmission directly inline with pinion yoke and if that is not possible set the pinion parallel to the engine angle. Although it is expensive, and only works if the pinion is not offset side-to-side from the output shaft, this is the only cure in many lift situations. By Jim Clark, Hot Rod M.D. A 30" shaft … So if you have a 10° angle from the transmission/transfer case output to the drive shaft, you set the upper u-joint angle to 5° and the lower u-joint angle to 5°. Compact Right-Angle Gear Boxes For small machinery and tight spots, these gear boxes have 1/4" diameter and smaller shafts and a footprint of less than 2½" square. This is not true. With shaft diameters of 3/8" and larger, these gear boxes transmit higher speeds and greater torque than Compact Right-Angle Gear Boxes. Driveline geometry. Before you weld the brackets on the rear end housing, be sure that the rear end was set at ride height, where the rear end would be with the car done. The Dana Corporation's Spicer Driveshaft Inc., publishes charts showing joint bearing life versus joint working angle at various rpm. While these angles are greater exaggerated, and larger than practical used, they show how fast the drive shaft will spin given a particular angle of rotation. When using a double carden driveshaft, the axle pinion angle needs to be 2* degrees less than the driveshaft angle. The values in the chart above show 0-45 degree examples. The process that can be used to address a condition called driveline/universal joint cancellation, often referred to as adjusting pinion angle.