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Old 06-28-14, 04:21 PM   #1
Eliaquim
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Default Noisy car

Hello!

My car becomes very noisy from 25 mph and up. The faster I go, the noisier it is. At least I know it's not from the engine. What would make a lexus roar like a big truck in the cabin?

Thank you!
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Old 06-28-14, 05:10 PM   #2
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Wheel bearings, cupped tires. do you have AWD?
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Old 06-28-14, 05:13 PM   #3
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Switch to neutral at high speed and see if noise goes away. If so it's tranny or drive shaft related. If not it's wheel bearings or tires.
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Old 06-30-14, 02:53 PM   #4
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Quote:
Originally Posted by Carver View Post
Wheel bearings, cupped tires. do you have AWD?

Yes, I have awd. Tires are almost new, less then 5000 miles. Will check the bearings, but, would bad trans axle fluid cause this? A friend said it sounds like the transmission is working hard, like asking to shift, although it's automatic. That's the sound.
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Old 06-30-14, 03:11 PM   #5
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how many miles in it?

have you drained and replaced all fluids?
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Old 06-30-14, 10:26 PM   #6
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Could even be if you have off-road tyres on the vehicle.

My 07 RX350 is usually nice n quiet, even with Yokohama Parada Spec X tyres (which are not off-road tyres).

However, it sometimes is pretty annoyingly noisy when driving in the opposite direction on the same road on which it was quiet (at same speed too!)

A mystery I haven't solved in 4 years of owning it.
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Old 07-02-14, 12:26 PM   #7
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125000 miles. Replaced break, transmission and steering fluids. Transmission fluid was not flushed. Just dropped the pan. I suspect the rear differencial. Could it be?


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how many miles in it?

have you drained and replaced all fluids?
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Old 07-02-14, 12:28 PM   #8
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I suspect the rear differencial. And it also seems to be related to heat, that is, the hotter the supposed part gets, the noisier it becomes. Could it be?
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Old 07-02-14, 01:39 PM   #9
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Did you do as Htownblue suggested? Get up to speed and put it in neutral to see if the noise stops.
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Old 07-02-14, 01:55 PM   #10
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Quote:
Originally Posted by satz View Post
Could even be if you have off-road tyres on the vehicle.

My 07 RX350 is usually nice n quiet, even with Yokohama Parada Spec X tyres (which are not off-road tyres).

However, it sometimes is pretty annoyingly noisy when driving in the opposite direction on the same road on which it was quiet (at same speed too!)

A mystery I haven't solved in 4 years of owning it.

Thanks for your input. However, I do not think it is the tires, as I am using the same tires for somke time now and it was not noisy before.
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Old 07-02-14, 02:38 PM   #11
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Quote:
Originally Posted by Eliaquim View Post
125000 miles. Replaced break, transmission and steering fluids. Transmission fluid was not flushed. Just dropped the pan. I suspect the rear differencial. Could it be?
I would do that first....
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Old 07-04-14, 11:44 AM   #12
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Quote:
Originally Posted by HtownBlue View Post
Switch to neutral at high speed and see if noise goes away. If so it's tranny or drive shaft related. If not it's wheel bearings or tires.
I did the test and the noise was still there. Also replaced differential fluid. No change. What should I do next?

Note: the shop guy said they used 3 litres of differential fluid, when the manual states to use 0,9. Is there space to put more? Is it ok to do that?
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Old 07-04-14, 12:07 PM   #13
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Have you eliminated wheel bearings?
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Old 07-06-14, 01:39 PM   #14
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Quote:
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Have you eliminated wheel bearings?

Ok, I have a bad wheel bearing. Will change that and see if it solves all the noise. Turning the steering wheel left and right, left and right helped.

Question: is there any reputable source selling rear hubs cheaper than sewell that ships to Africa?
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Old 07-06-14, 03:49 PM   #15
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Sewell will ship to Africa? Truly an amazing company. i once shipped a book to Canada, never again, incredible bother.

Is it both of the rears?
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