I removed the halfshafts & driveshaft today to replace all the unis, upon completion I connected only the driveshaft back to test for any vibrations (the halfshatfs are not connected), so the diff companion flanges just spin by themselves. It was all smooth until about 80kph or 50mph then I can hear the tunnel vibrates, kinda loud. If I rev it pass that speed then its fine, tried gear 3,4 and 5 and all have the same problem.
When I install the unis I put both the grease nipples on the same side (the nipples are on the caps) instead of opposite sides, could this be the culprit to the vibration? They are a few grams max, could it be that they caused the vibration since we are talking high rpm here? Ive yet to rotate the driveshaft 180 degree and I'll do it tomorrow, also since they tunnel vibrate without the power transmitted to the ground Im guessing the same thing will happen when the halfshafts are connected?...Please give me some inputs, I dont really want to remove the one uni and rotate the nipple to the other side. Thanks