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By far the most common cause of a vibration while driving is a tire balance issue. I would recommend to have all the tires balanced 1st, and if that does not take care of it, you may have a CV axle issue, or possible suspension, or even internal transmission problem, but all of those are much less likely. Just to be clear though, the vibration is only while driver between 35 - 45 mph, correct? It does not happen when you are braking? Please let me know of the tire balance does not take care of the issue, and we can dig into it further.
No.it does not appear when braking. I tried rotating the tires and also put the spare on each axel, one at a time and drove the car each time with no changes. Everything seems to be in balance. It does have a lot of miles on it, the struts were replace about 30 k miles ago and I have about 80 k miles on a factory rebuilt tranny
Foot of accelerator. When foot removed from gas it goes away
Cv makes sense. Motor mount broke about 2 months ago and heard a ,kind of,clicking noise before I stopped. While checking for this problem I noticed one of the cv boots was torn. I will get new half shaft and then try it out.