coasting sounds like rumble strip

Ok so I got my oil changed and tires rotated a month ago. I just got on a road I can go 45 + now when I coast at 50 or more it sounds and feels like a rumble strip. Runs fine no check engine. What's the deal?

 

check your tires and see if they are cupped on the edges. mine are, and it makes the same "wahwahwah" saound when going down the highway. also...check your u-joints.

 

bump

 

Check your air intake assembly. If something's come loose, it can make all kinds of crazy noises.

 

if the tires didnt make that noise before the rotation, then it cant be the tires.

 

it was the U joint

 

I have the same sound... you are saying that one of your u-joints was bad? how did you diagnose it? I was under my truck a couple days ago and all of mine looked good.

 

Have you done the CB drop? I had a very similar problem as you after I did my lift. When coasting I had a very distinct sound, same as what you described. I just installed a CB drop bracket from Beefed Tacos today.

It is like night and day! I have no more dash rattles and no more low speed vibes while decelerating/accelerating (around 40kmh/25mph)





Now my D shaft angle is virtually non-existant.

...regarding the ghetto straight pipe, a cat-back exhaust is on the way

 

I climbed under and looked, my buddy took it of and it was rusted pretty bad

 

alright thanks for your help.. i will have to look at it again.

My only hesitation to believe that my truck's ujoints are going bad is the speed that the sound seems to be coming.... i.e. it sounds more in tune with the speed that the wheels are turning and if the u-joints were failing wouldnt the noise sound faster than the tires?

not sure if that makes any sense..

thanks alot

 

Just climb under and look it takes like 20 minutes to take it off and switch it out. Take it off if your haveing trouble seeing it

 

Put your e-brake on and truck in neutral and see how much play you have at theu-joints. If the joint is sloppy and has ply you know it's bad.