wheel vibrations

[bbf]

my 07 limited has developed a terrible vibration at 50-60 mph- the thing is this doesn't happen all the time and after a few minutes slowing down it seemly goes away- i thought it might be wheel balance/alignment issue but than why wouldn't it happen all the time - any thoughts would be apperciated

 

[Bossman]

Some threads to hopefully point you in the right direction:

http://www.toyota-4runner.org/4th-gen-t4rs/9081-steering-vibration.html

http://www.toyota-4runner.org/4th-gen-t4rs/88450-shaking-steering-wheel-60mph.html

http://www.toyota-4runner.org/probl...57-steering-wheel-vibration-change-tires.html