I have a bad rumble peaking at 70 KPH. It does this on the road and running on axle stands. Today I removed the rear driveshaft and ran it. Rumble is still there. Removed the front shaft and is much better. The U-joints don't feel too bad but the rubber on the hanger bearing is very soft. I have ordered the hanger and 3 U-joints and will change them all. I did not mark the shaft alignment between the front and rear shaft. So what is the proper phasing ? Does the yellow line on the front spline line up with one of the cut out inner splines ? If so it can go on two ways 0 and 180. Each shaft has balance weights so I assume each shaft is balance individually.