wayoutwest Posted March 25, 2008 Share Posted March 25, 2008 Just a quick question.... I had two things done to my car at about 30k miles (AVO rear adjustable endlinks (already had the sway and mounts w/o problems), and Motul synth diff. fluid), and since then there is a significant humming/drone noise when on the freeway, especially noticeable between 60-80mph. It is vehicle speed dependant, not engine speed dependant. I didn't think the endlinks could be causing the noise... is one of the 'features' of synthetic diff. fluid that there is more noise at cruising speeds? Not really noticeable outside of the 55-85mpg range. Thanks in advance for the help! Dave Link to comment Share on other sites More sharing options...
urfsin Posted March 25, 2008 Share Posted March 25, 2008 I bet you have a bad wheel berring. Slide It Sideways Link to comment Share on other sites More sharing options...
wayoutwest Posted March 25, 2008 Author Share Posted March 25, 2008 So you think it is just coincidence that it happened when i also did those two things? I need to figure it out soon... i have 35,300 miles on the car and want to get it covered under warranty if possible! Link to comment Share on other sites More sharing options...
Jim_KT Posted March 25, 2008 Share Posted March 25, 2008 I bet you have a bad wheel berring. Agreed. The humming sound is quite possibly a bad wheel bearing. Endlinks should not make any sort of humming sound unless it is bumping up on the axles or their CV boots. If they are, you'd know by just poking your head underneath the car and visually inspecting them. If you can, jack up the vehicle on all the hard points (wheels free to move) and put it in gear. Let it idle and work your way around all four wheels to see if any one of them makes any sort of grinding sound. One other method is to jack up each corner and give the wheels a good tug & wiggle. See if there is any play. If there is, you could quite possibly have a bad wheel bearing. Unfortunately, when my passenger rear wheel hub went out this method did not net me any results. The local shop that my wife and I trust with our Hondas diagnosed the bad bearing by the first method. Link to comment Share on other sites More sharing options...
Jim_KT Posted March 25, 2008 Share Posted March 25, 2008 So you think it is just coincidence that it happened when i also did those two things? I need to figure it out soon... i have 35,300 miles on the car and want to get it covered under warranty if possible! Quite possibly. When I installed my iON springs, no more than a week later my passenger rear bearing went tango uniform. It also wouldn't help to verify that you filled the rear differential with the proper amount of fluid. Just open the fill plug and inject more diff. fluid. Link to comment Share on other sites More sharing options...
wayoutwest Posted March 25, 2008 Author Share Posted March 25, 2008 Only really noticeable between say 55-85 mph, and it does change pitch as the vehicle speed gets faster (higher pitch, faster speed). A little more info. Link to comment Share on other sites More sharing options...
Jim_KT Posted March 25, 2008 Share Posted March 25, 2008 Quite possibly. When I installed my iON springs, no more than a week later my passenger rear bearing went tango uniform. It also wouldn't help to verify that you filled the rear differential with the proper amount of fluid. Just open the fill plug and inject more diff. fluid. Ooops, I meant to say "It wouldn't hurt to verify that you filled the rear differential...". Link to comment Share on other sites More sharing options...
BlackHole Posted March 25, 2008 Share Posted March 25, 2008 Quick test - does the noise go away when you corner one direction hard? If so, then it is likely the wheel bearing on the same side as the direction of turning. Can you feel added vibration in the steering wheel when you hear the noise? If so, then it is likely a front bearing. Kyle "BlackHole" Link to comment Share on other sites More sharing options...
wayoutwest Posted March 27, 2008 Author Share Posted March 27, 2008 No vibration at all, and cornering hard does not matter... Link to comment Share on other sites More sharing options...
Sleepyman Posted March 28, 2008 Share Posted March 28, 2008 Wheel bearings are usually higher speed noises(unless your wheel is falling off) and are proportional to speed, so if its a higher frequency noise at higher speeds, than thats most likely your problem. My last accord did the exact same thing at 75-80mph, rear wheel bearing was going, but I drove it for over a year like that. All the tranny and diff noises I hear in our cars are only on decel, but I'm not a drivetrain specialist. Link to comment Share on other sites More sharing options...
wayoutwest Posted April 1, 2008 Author Share Posted April 1, 2008 SOLVED! Actually ended up replacing a rear passenger side wheel bearing AND ditching the AVO endlinks. Quiet as a mouse now. Link to comment Share on other sites More sharing options...
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