Can anyone help me narrow down a situation? 1999 wj full time, 135,000 miles. A roaring noise starts up front around 35 mph, and you can hear it over the radio. I've also noticed that the front end wobbles intermittently. It comes and goes....... What gives?
Possible hub/wheel bearing? Get it to the speed it makes the noise, then slightly swerve back and forth, if the noise gets better steering on way and worse the other then it's prob a hub or bearing. Btw if so it will be on the opposite side of the turn that makes it worse, ie. if going to the left makes it sound worse the problem will most likely be on the right side. Hope this helps.
I went out this morning and pulled off the front wheels. I didn't see/hear/feel anything off. So I rotated the tires (there is one odd tire in the group). I didn't notice any cupping, etc. I did adjust the tire pressure (they were all @20 so I bumped them up). I'm going over to Raleigh today so I'll try testing the wheel bearings.
It's hard to say what the wobble is, I've never had one do it before. I guess I'd characterize it as this sudden and mildly violent jerking of the steering wheel back and forth. It starts suddnely and end suddenly and I cannot make it consistently reproduce it.
As for the article, i think I'm going to agree with it (thanks a ton for posting that link). Yesterday I had the doors off of my JK and met my wife at my mother in laws. We left at the same time and I rode on both sides of her WJ at speed to see if I could hear anything. Of course, my mud terrains were loud enough, but I could not hear any noticeable roaring noise. So i guess my next step is to drop the axle and put it on the bench and rebuild it.
before you go tearing out the front diff, revert to the basics. No need for work to be done when it didnt have to in the first place.
take the front driveshaft out, if the roar disappears thats the culprit. most of the roaring ive experienced has been from the front driveshaft. Also, jack the front of the jeep up (with the front driveshaft out) and rotate the front wheels by hand. Better yet, have someone do it while you listen to the front diff. Then push and pull the top and bottom of the tires up front to see if you have play in the wheel bearings. Another possibility, check your T-case fluid level, mine was leaking fluid and made a roaring sound when it was low.
As for the wobble.....make sure all of your suspension bolts are tightened to the correct torque spec....bolts loosen over time. Im talking upper and lower control arms, Trac bar (especially), check for play in all of your tie-rods.
Hope this helps,
Ok, I took the front driveshaft off and drove it around the block. The noise did not decrease (it might actually have increased a little). So I put it back and and have come to the conclusion that the front carrier bearings need to be replaced. According to the carfax on this vehicle, the PO had the front pinion seal replaced. I believe he had his local mechanic do the work. I have my suspicions that things "might" not have been done correctly. I guess my saying is true "just because you CAN call yourself a mechanic, does not mean that you SHOULD". Sooooo, it looks like I'm going to be assembling all the parts to rebuild the front diff. I'm going to take my time, do some research and do this myself (I've got experience rebuilding huge gearboxes for industry, as well as aligning equiptment, so I know my way around a dial indicator, etc). I'll probably be doing this in about three or four weeks, so I'll check back and let you know. Once again, I appreciate each and every one of you guys who took the time to work with me on this!
I would check your wheel bearings. If you lift the front wheel and try and rock it top to bottom and side to side I think you will find it wobbles. Replace the bad wheel bearing or both bearings with Timken's bearings, brand name. I ordered them from auto geeks for $80 each with free shipping.
If you are going to keep the jeep stay away from the cheep import bearings.