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driveshaft angles measured
Also while I was under the car this weekend, I measured the angles between each section of the driveshaft. Relative to the pinion shaft in the rear diff, the engine is tilted about 4 degrees back (yes the engine really is tilted back). The angle of the front section of the driveshaft appears to be designed to be at zero degrees tilt relative to the engine. Then it looks like the angle between the front and rear sections of the driveshaft are designed to be at about 2 degrees. The angle between the rear section of the driveshaft and the pinion shaft in the rear diff appears to be designed to be at 2 degrees.
The equal angles at two successive u-joints represent the classic design to cancel varying angular velocity caused by a angled u-joint. So, it looks like Subaru did their homework. Anyhow, for those of you who have read up on driveline theory, I thought you might find this interesting.
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