Hey guy. When i hit the 40 mph mark my truck starts to shake pretty badly. It smooths out after you get past about 45 mph. I just got new tires. Could it be the tires are out of balanced? U-Joints? Wheel bearings? Thanks in advance.
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if the shop that did the tires is reasonably good in your mind then signs point to a bad u-joint - I would recommend getting them both done at the same time (most of the price of the job is the labour - I made the mistake of only getting one done and about four months later the other one went).