Angle of the Dangle
Whenever we lengthen or shorten a driveshaft, we have to consider driveshaft angle. Driveshaft angle must be the same as the crankshaft and transmission output shaft for proper function. IED sells a special instrument for this purpose called a magnetic protractor. The magnetic protractor mounts on the differential pinion magnetically, which tells us the pinion angle. It also attaches to the transmission tailshaft housing to determine the angle there too. If pinion angle isn't the same as the transmission tailshaft angle, the rear axle must be shimmed fore or aft to correct pinion angle. We change pinion angle by rotating the rear axle fore or aft around the housing's lateral axis (axle flange to axle flange).
Driveshaft Troubleshooting Facts
IED knows Jack when it comes to driveline woes. They're here to help you based on solid tried-and-proven experience in more than 20 years of business. Here are some valid pointers.