enriquerrs

Hi, new owner here. I got a 2004 GX470 a few months ago with 113,xxx miles on the clock. Lately I've been noticing an intermittent vibration coming from the drive line at different speeds. At first thought was wheel balancing but after the balance it keeps doing the same. When happens, can be at speeds of 30mph or 70mph. Any advice of what to look for? Also the radio turns on but I can't hear anything coming from the speakers. Thanks in advance!

chiph9

Driveline vibration can be a number of things.

If your tires are showing signs of cupping (and your balance guy should have told you if they are) it's likely worn shocks.

Another possibility is a damaged driveshaft, or one that somehow got something stuck to it (underbody coating, ice, etc) and threw it out of balance.

It's also possible that various suspension bushings are worn. Again, your balance guy should have noticed, but if you jack up a wheel (use a floor jack and jackstands, not the weak & unsafe factory jack), grab the wheel by the 12 & 6 o'clock position and rock it back and forth. Then grab it by the 3 & 9 o'clock position and repeat. You shouldn't have any looseness.

And it's possible your balance guy did a bad job. Look for a shop that does road-force balancing, using a machine like a Hunter GSP9700.
http://www.gsp9700.com/

For your audio issue - do you have the Mark Levinson option?
Chip H.

enriquerrs

Thanks for the info will check, I was thinking that maybe can be bushings. The radio is the Mark Levinson.