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I know this in one of those things that is nearly impossible to diagnose on a forum, but I have a new noise. It is a slight whining sound whose pitch is matched to driving speed. It is not engine speed, nor does it change with gear shifts. It is only based on truck speed.

This seems to be loudest when everything is cold (i.e. 75 degrees, truck has not run in hours) and as I drive it quiets down.

I looked underneath and saw no leaks and nothing stuck somewhere (like a stick or something). Everything seems to drive ok, no noticeable change except the sound, but new sounds make me nervous. If it is going to be a problem I want to solve it before it gets bad.

Any ideas would be great. Thanks.
 

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Kajun Kim
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hmmmm, I think maybe Layonn may be able to help you. Don't know if he is on line right now, but you can try sending him a PM to take a look at your thread.
 

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Could be the rear diff but not sure
 

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Does it only happen above 60 mph? On deceleration only or both?

DEWFPO
 

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I had a wheel bearing going out on an SUV and it eventually sounded like Super Swampers on the highway before I figured it out. It started out as a deep whirring/whining noise.
 

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this is my first toyota.. all i ever heard was how superior toyota quality is compared to other makes out there....I think toyota forgot to add that quality to the FJ cruiser!... I stoped counting the squeeks, bumps, noises,window cracks, bulges, brakes problems, ect.... many more just can't remember them all...
 

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True dat... <<<=8)Ron

this is my first toyota.. all i ever heard was how superior toyota quality is compared to other makes out there....I think toyota forgot to add that quality to the FJ cruiser!... I stoped counting the squeeks, bumps, noises,window cracks, bulges, brakes problems, ect.... many more just can't remember them all...
 

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That is the sound of a bad rear diff......

Does it come and go with the foot on and off of the gas???????

Mine blew out twice with that sound as the only noticable sound.....I first thought a tire was rubbing in the rear....
 

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Is it a front end noise or a rearend noise? It could be your alternator bearings. if its from the rear end your looking at possibly being the rear diff
 

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Give me alittle more info, Or give me a call # 608 302 8014! I will seee what i can do, I have changed just about everything in our FJ and i'm pretty good with noises, I just replaced the front wheel bearing in ours also
 

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Check the rear diff fluid for a burnt smell. Then check the front wheel bearings for play ( jack the front up and apply alternating pressure to the top and bottom of the wheels. also spin them to check for sound. Then check the the alternator for corrosion near the shaft that goes through the center.

Do you have an aftermarket amplifier for your stereo? It might not we properly grounded.
 

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Could be your tires. I get some noise between 60-70 km/h. I had it checked by dealer. Mechanic said it's tires. My rear diff fluid was changed and there was no difference after, so I don't worry about any more.
 
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