Stumped

DoverKJ · **Posted:** Mon Feb 20, 2012 3:16 pm

Like many others on here I have developed a hum somewhere in the drive train that is getting worse. I have an 04 with 120k on it. New set of duratrac with around 4k on them. The noise began to develope after replacing all the rotors and pads. Rotated the tires, no change. Pulled the.passenger side half shaft thinking it might be the intermediate shaft or Cv, both were fine. No play in either front hubs and cant find anything lose. Checked both driveshafts as well and could not find any play in either front or rear.

The hum/vibration starts around 45 and disappears around 60. Noise is also worse when coasting or slowing down and goes away somewhat under load.

Suggestion as what might be causing the problem. Would like to fix it before something breaks leaving me on the side of the road or in a ditch.

ryanee182 · **Posted:** Mon Feb 20, 2012 3:41 pm

Is it possible that it's just noise from you new tires? My mud-terrains are quite loud at 40 mph, but they quiet down at highway speeds or below 35 mph. They just seem to resonate at 40 mph.

Also, did you try balancing your tires? I balanced mine at my last rotation, and it made a big difference at highway speeds.

DoverKJ · **Posted:** Mon Feb 20, 2012 4:50 pm

The tires we very quiet when I first got them. Previously had MTRs on for the last 7 years which are much more aggressive then tread then the duratracs are. The MTRs were loud, but never like this even when they got saw toothed. Tire rotation also made no change. Can't here the noise outside of the vehicle either.

I could live with tire noise.

DoverKJ · **Posted:** Fri Feb 24, 2012 8:29 pm

Well finally found the problem. Bad ujoint on the rear drive shaft. One cap had nothing but rusty powder and a few needle bearings left inside. No play in the joint but was missing the rubber seal on the bottom of the cap. Driving much better now

Stumped

Who is online