Question about 2005 Lexus Ls 430

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Transmission or tires?

I hear a buzzing sound coming from the rear of the car when driving. I thought it was tire noise but just replaced tires and it is still there. Could it be the transmission? The noise goes away at high speeds but is very noticeable around 30-50 mph. Car is in excellent shape with only 67K miles. Never had any other issues.

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Why am I hearing a roaring sound in my 2007 Lexus 350?


I am thinking that the noise is from a failed wheel bearing or possible cv joint failure
find yourself another service dealer as tire noise is either there or not there and rotation (if it is a faulty tyie ) would move to the new position
Here is a clue to consider
rotating tires is a ploy by the tire dealers to sell tires
have a wheel alignment done on the rear first and then the front and leave the tires alone
if it is a front wheel drive vehicle you will get 3 times the mileage out of the rear tires compared to the front drive tires and that is a big saving for you
next point -- radial tires continue to wear in the same pattern regardless of where they are put so how are you to know it it is a faulty tire construction or a need for a wheel alignment
third point --- many brands of tires are made as directional tires ( a directional arrow on the side wall) and cannot be rotated because they cannot be fitted on a wheel that rotates against the arrow
if they are the wear in pattern of the belts in the rubber is altered and may lead to tire failure ---the tread pattern is designed to remove maximum water and produce maximum grip in the direction of the arrow

Sep 26, 2015 | 2007 Lexus RX 350 FWD

1 Answer

I hear a roaring noise in the rear of my car what can the noise be?


The noise would be coming from something that is turning at the same speed as the tires.
It could be a hub bearing or a worn tire.

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1 Answer

I have 2002 honda civic with noise coming from rear sounds like a noisey wheel bearing have jacked up both sides and spun wheels with no sign of noise .


Check Tires for feather edge. Join your fingers together, move around the rear Tire from front to back and vice versa on both of the rear Tires and feel the smoothness. If the tread of the Tire resist the fingers in one direction and smooth on the other, then the Tires may be producing the abnormal noise.
Temporarily bring both the front Tires to the rear and rear Tires to the front on the same side, drive the car and watch the noise. If the noise begins to come from the front end, then the Tires are defective and need replacement. . If the noise still comes from the rear wheels then the rear wheel bearings need replacement.(You can also rotate the Tires in criss cross manner temporarily)
The bearings often vary noise with and without load. Be sure to troubleshoot the noise before spending money on costlier spares.

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1 Answer

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1 Answer

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1 Answer

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first i would check the tires , are they cupped or chopped on the tread? run your hand over the tread and see if it feels rough and uneven. take the truck to a auto repair shop and have them jack both front and rear axles off the ground, put the truck in 2 wheel drive and run the speedometer to the speed you usually hear the roaring noise, if you don't hear the noise , put the truck in 4 wheel drive, turn off the traction assist if it has one and run it to the speed you would hear the noise. if you hear the roaring noise with tires off the ground, the problem is in the drivetrain, (engine, transmission, transfer case, u-joints, differentials or the front left or right cv halfshafts or u-joints). the older models (97 98) had the front two driveshafts from the differential turning all the time, they engaged in 4 wheel drive from the transfer case and a solenoid on the front differential. depending on the miles you have on this truck, the most likely areas i would look at would be the tires, u-joints/cv joints, and front and rear wheel bearings. thanks and good luck.

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1 Answer

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first check condition of discs and pads if all is good drive and pull up handbrake slowly to see if its the handbrake shoes making the noise if still a problem will most probably be rear wheel bearings

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