I got to thinking today, that when i have rear of car off the ground, i get no vibrations at all. Im talking an inch off the ground and motor s running at 130 mph. This doesnt change anything except tires not touching ground. Took both tires to shop and low and behold one was 2.5 grams off, other was 1.5 grams off. This baffeled me because no weights had fallen off, but tire pressure was 26 lbs in each. Originally i had 35 lbs in each 5 months ago. By the way yolk was within 1'' range give or take. Talked to tranny shop today he said there is no magic number for yolk being in to much or not enough. By the way car doesnt vibrate at all since tires were rebalanced. So im thinking if vibes come in agian i will just keep 26 lbs of air in each!