Holy crap, I had NO idea this car could feel this good! I was certain, before solving this, that the shake was only at 80mph - however, it feels like a brand new car all the way from 10mph up. I didn't actually know I had an issue at slower speeds. Obviously the 80mph shake was dramatic and pronounced in comparison, but if you have this problem, there is a VAST improvement to be had, not just at 80mph. I was shocked the moment I started driving and knew my problem was solved long before I got to 80.
Unfortunately I made two changes at once so I don't know which solved it:
- rebalanced tires
I brought them to Discount Tire. They told me the tires were already balanced and didn't need a rebalance. However I paid them to tear all the weights off and perform rebalance anyhow.
- used a new strategy for torquing
I ensured the weight of the car was not on the wheels while I torqued them. I had the car jacked slightly so the wheels only slightly grabbed the ground to prevent them spinning, then torqued them to 45lb, then to 77lbs.
Obviously it's strongly likely that I rotated which lug bolt each wheel hole is using, just by taking them off and putting them on without paying attention to the bolts, thus performing the suggested "rotate the wheels on the lugs" solution.
If you have this problem you should try everything in the list until it's solved. Amazingly worth it.
Last edited by lance_mn; 04-26-2019 at 09:19 PM.