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I own a 2005 Suzuki Forenza with 42k miles. In the past month I've noticed considerable road noise. The dull hum is loudest when I reach 60 mph. I thought it was tire wear, but my all-season tires are only 5 months old with 8k miles on them. I rotated them just the same, but the noise was still as persistent. I returned the tires to the retailer and put on brand new all-season tires, and road noise was still persistent. Also, the noise is unchanged whether accelerating, deccelerating, or coasting at 60 mph. Any clues?
Wheel bearings or diff bearings try coasting wiht the engine shut off down a hill to listen better,or get someone who knows cars to come with you to hear the noise
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Rub your hand over the tread and try and feel for cupping or uneven tread patterns. This will create alot of road noise. If not, have your wheel bearings checked.
Does it get louder as you go faster? This could be a bad wheel bearing. Go for a drive on a safe street or road with no traffic. Drive at 40 mph and now put the vehicle in neutral and shut the engine off. If you still have this noise it is probably a wheel bearing. Try to determine which corner the noise is loudest to find which wheel bearing is making the most noise. You may need to lift all 4 wheels off the ground and test to find the noise. Be careful and use jack stands. I hope this helps. Rod
Check the transmission fluid easy fix. The humming noise could be road noise and can't do anything about that, but if it is coming from any certain area around the vehicle would be helpful in finding a solution. Check rear wheel bearings for loose worn or damaged areas. Hope this Helps
They now have a bearing assembly, you replace the unit as one. The humming sounds like a Blazer I did last week. Same noise/humming over 25MPH..? Sounds just like road/tire noise. Hope this helps.
They have been doing well and there problems are fewer than most. Sounds like you have a pretty good car. Have those trouble codes checked and repaired though so it does'nt cause problems down the road. Good luck.
At that mileage it could be, and most likely is given your description of the noise. I assume it reduces in volume as you slow down. If you can find a quite piece of road drive up to where the noise is apparent and lightly swerve from left to right. (Don't roll the car!! ) If the noise reduces as you swerve left then its the left bearing. If its when you swerve right that the noise reduces its the right bearing. If its both the only way is to jack the rear up and spin the wheels as fast as you can and listen. If there's a hint of a rumble from it, its that bearing or both. It should be completely quite apart from the slight hiss as the shoes rub on the drum. 35K may not seem much but if you don't know the history of the car it could have hit a bad pot hole or even had a knock on a kerb. I have replaced bearing with a lot less miles than yours.
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