2002 seirra extended cab 4x4 vibration-HELP

[brianski]

I have a 2002 Seirra extended cab 4x4 5.3 liter with 110,000 miles on it and I am having a vibration between 55-68 mph. I replaced the entire driveshaft with a new complete oem shaft. I had the wheels and tires road-forced balenced. I do have Yokohama tires on it that are all wearing very good.
I am lost as what to do next!
The vibration is there no matter what gear i am in(overdrive, d-3, neutral) it has not effect on the vibration. I also replaced all the brakes, new pads and rotors all around. Please help me- Its driving me nuts!
THANKS
Brian

 

[Z15]

maybe this will help

http://www.tirerack.com/images/tires/vibechart.pdf

 

[98trck]

did you have the vibration before driveshaft replacement
the u-joints must be phased correctly to each other ( slip joint must be inserted incorrectly)
also check your engine mounts and tranny mount

 

[happy 2011]

How about the u joints in the front shaft. I belive that it turns all the time. This would give you this vib.

 

[brianski]

vibration

Guys I had the vibration before we put in the new driveshaft. It was dealer installed- I would guess they know what they are doing. I will check all the mounts- motor and transmission. Thanks for all you help!

 

[happy 2011]

don't be so sure that dealer techs know what they are doing. It's the luck of the draw of who's bay your tk goes in. I worked at a dealer for 4 years and saw some pretty lame/dump techs.