I am getting a vibration i can feel in that its vibrating the steering wheel; and i can feel what seems like unusual bumpiness and vibrating under and in front of my feet while driving at highway speeds of 65 or above.

 

Similar problem as this?
https://www.clublexus.com/forums/rx-...l-shaking.html

 

This is saying either wheel/tire assembly balance issues or really more to tire brand......After lots of research on tires, you will be surprised of the make up of different tires in one category.....Most of my vehicles, I've always went w/ a dry/wet or a uhpas (ultra high performance a/s) tire.....For this vehicle, it makes no sense to go w/ either of those types of tires as its not a sporting vehicle to drive....Seems basically its best to use a touring or grand touring tire.....Look at the weight & the make up & go w/ a 30-40K tire......

 

well thing is it doesnt happen all the time. its random; sometimes it happens sometimes it doesnt. so im thinking suspension or something?

 

Try to rebalance tires first.
Last summer on return trip from Colorado (mountains) I got vibration at 80 mph and above. I didn't have when I was driving TO Colorado, so my first solution was to re-balance tires, and it helped.

 

IIRC you did mention your A-arm bushings are half wore out....Get the complete A-arms w/ the bushings & ball joints installed & have a indy shop install them as well as a alignment. And yes shop around about installation 5-6 shops to give you a idea......If your going to keep this vehicle, I'd do it, If not, then sell it the way it is, but you wouldn't get top dollar for it thou....

 

I had dead LCA and leaked struts - no vibration. Bad alignment only.

 

nope! this is my daily driver for quite some time to come. my shop down the street did mention one of the a arm bushings was 30 percent worn out so yes that may be the issue at hand. Why would i need to put new a arms on if thats going to add to the $ if i just need new a bushing put in?

 

i suppose this is a possibility that i may have to look into.

 

Felix is right, just do the whole arm. I couldn’t find one shop who was willing to do the bushing itself, and the ones that did would have charged me more than the price of installing a new arm/ball joints. My old ball joints, bushings and arms were in rough condition at 150k miles so may as well do the whole arm while you’re there.

 

well for now it has to wait as i dont have the $ to do the bushings let alone the a arms; so until i can set aside some $ to get the big stuff like this(and to get what i believe are 2 idler pulleys that need to be replaced) done; it will have to wait. but yea im past 150000; im almost at 160,000 miles on my 350.

 

Drive it easy & don't beat on it & say under 60mph.....till then.

 

uh; staying under 60 around here on the highways is impossible. You will get your hind end practically run down/over. So i cant do that.

 

How old and what is condition are your front tires?

 

the front tires are still fairly new so that shouldnt be a issue. Something tells me its gotta be suspension related like the lca's?