Driveline Vibration at 70+ ??

mhraracing · March 10, 2004

Hey guys - Let me know if you can help me. My 02 HD 4x4 has a slight driveline vibration at about 73 mph. and goes away around 80. I seem to remember a post on here about a TSB for replacing the driveshaft. I did a search but didnt find anything ???

My truck is going in for the Steeringshaft Clunk (tsb 00-02-35-003a) tomarrow and would like to have them fix the vibration too.

Does anybody have the TSB for this ???

I like to go to the dealership prepared.....cause you never know what they will say or do !!

Thanks for any help !!!

mhraracing · March 10, 2004

Hmmm - checked alldata - didnt find a TSB.......wonder what the stealership will tell me about my vibration ??

Do you guys want to do a poll.....

1 - Your dirving too fast ??

2 - You need new tires ??

3 - We didnt notice anything ??

Even though my truck only has 22k miles on it and I have rotated the tires twice - they still look brand new.

We shall see ??

vmaxup · March 10, 2004

Let me know and everyone else.

Mine goes in Fri for some good tires and rims from them and the there going to put this EVA(electonic Vibration Analysis) on it so we will see.

My post is shake me not. Vibrations worst at 50

jelisfc · March 10, 2004

If you have a two piece drive shaft and and Alli check here. http://dieselplace.com/forum/forum_posts.a...sp?TID=160&PN=1

I have a two piece but a 6spd. Around 55 I had a vibration but I also played with lowering my carrier bearing to get rid of a launch shudder. It was trial and error until I found a 1.0" spacer almost got rid of both.

mhraracing · March 11, 2004

Well here are the results from the dealer.....

1 - Steering shaft - They performed the TSB thats posted as a sticky in the Light Duty section.

WOW - What a difference !!!! - I cant believe I didnt do this sooner !!! For all of you guys out there that havent done this yet.....DO IT !!! - My steering feels great......It doesnt feel like the steering shaft is going to fall out anymore !!

Now for the Vibration.......Just as I thought......They gave me the run around - they told me that they took my truck out for a test drive "up to 65 mph with no vibration felt" Well guys....I told you the vibration starts at 73 MPH - of course you didnt feel anything. They stated that "legally they cant drive my truck faster then 65mph - so there is nothing they can do." SO I said....you have NEVER driven over 65 mph in your entire life ???? - The response was - "Well Chevy doesnt have a TSB for this - so we really cant help you - BUT - If you can find a dealership with a Dyno that can run your vehicle up to 75 Mph then they can diagnose your problem. "

So I said OK - - If they cant drive my truck faster then 65 - then I dont want those guys working on my Truck anyways.

So - Its a good thing the Vibration is very slight......it comes on at 73 - then is gone at 79....so I guess I will write GM a letter. See what happens ??

Unless you guys have any other suggestions ???

Thanks

D