Whine in the rear, u joint or differential? - Toyota Nation Forum : Toyota Car and Truck Forums

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post #1 of 7 Old 06-05-2017, 12:30 PM Thread Starter
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Whine in the rear, u joint or differential?

My MX73 has developed a whine in the rear, which is amplified by the speed of the car. I do have a small amount of vibration, and hoping it's a $20 u joint, not a $$$ rear end.
What is a good method to test each?
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post #2 of 7 Old 06-06-2017, 08:23 AM Thread Starter
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I noticed that if I am coasting, no matter the speed, the noise is not present. Only when gas is applied and the drive shaft is fully engaged does the noise appear.
My logic is if it were a bearing, the noise would be present as long as the wheels or car is moving. The noise is definitely coming from the rear.
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post #3 of 7 Old 06-10-2017, 02:29 AM
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After 30 years, the centre bearing is almost certainly dead or ready to make that last journey.
Since it is cheap and you will need to replace it soon anyway, replace it now and see if the problem goes away.
Only requires simple hand tools and isn't hard to figure out.

- Stepho (MX73)
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post #4 of 7 Old 06-15-2017, 06:44 AM Thread Starter
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Originally Posted by stepho View Post
After 30 years, the centre bearing is almost certainly dead or ready to make that last journey.
Since it is cheap and you will need to replace it soon anyway, replace it now and see if the problem goes away.
Only requires simple hand tools and isn't hard to figure out.

- Stepho (MX73)
Thank you for the reply Stepho, are you referring to part #41201B as shown on the parts diagram?
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post #5 of 7 Old 06-15-2017, 11:06 AM
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No.
The centre bearing I am talking about is the rubber mounted bearing that sits halfway along the driveshaft between the gearbox and the diff.

- Stepho
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post #6 of 7 Old 06-15-2017, 11:09 AM Thread Starter
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Originally Posted by stepho View Post
No.
The centre bearing I am talking about is the rubber mounted bearing that sits halfway along the driveshaft between the gearbox and the diff.

- Stepho
Ah ok, so this center bearing: http://www.oreillyauto.com/site/c/de...1418&ppt=C0362
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post #7 of 7 Old 06-16-2017, 07:25 PM
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Yes.
I've replaced that centre bearing on several of my cars and it has made them much better.
Not guaranteed to be the solution of your problem but it's cheap and easy.
- Stepho
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