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Rear Diff?
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Old 20 Jun 2007, 07:34 PM   #1 (permalink)
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Rear Diff?

Don't know if i've got this right, but under the car, between the rear wheels, there is 2 plugs where u change some oil. Is this for the rear diff or have i got it wrong.
Might be a problem, might be not, but there was a bit of oil on the bottom of this, but only a bit. Am i to worry?

Also can low oil/dirty oil cause like a tyre on different road surfaces sort of sound? If u see what i mean.

Scotty.
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Old 20 Jun 2007, 07:48 PM   #2 (permalink)
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Scotty they are the drain and fill plugs for the rear diff.
The upper one should be the fill/level so oil should be just running back out when you undo it....
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Old 20 Jun 2007, 07:50 PM   #3 (permalink)
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Quote:
Originally Posted by PeterUK300 View Post
Scotty they are the drain and fill plugs for the rear diff.
The upper one should be the fill/level so oil should be just running back out when you undo it....
Do u know what oil i need to fill up and how often do i change it?
Also would low oil in this cause any sound from the rear?

Sorry for so many questions.

Cheers.

Scotty.
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Old 20 Jun 2007, 07:52 PM   #4 (permalink)
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The rear diff uses the same as the gearbox I believe.....

Low oil could cause a whiring type noise
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Old 20 Jun 2007, 07:55 PM   #5 (permalink)
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Quote:
Originally Posted by PeterUK300 View Post
The rear diff uses the same as the gearbox I believe.....

Low oil could cause a whiring type noise
So that could be the noise i am getting.

Sorry, but i don't know what oil the gearbox uses on my WRX.

Scotty.
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Old 20 Jun 2007, 07:55 PM   #6 (permalink)
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Quote from Oilman

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For the gearbox and diff use a gl4/gl5 75w-90. You can go either semi or fully synthetic and we tend to recommend Silkolene Syn 5 75w-90 synthetic.
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Old 20 Jun 2007, 07:56 PM   #7 (permalink)
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If going synth I would drain and refil..
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Old 20 Jun 2007, 08:03 PM   #8 (permalink)
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If going synth I would drain and refil..
I will drain it all out anyway, cause i don't know when it was last done. Is it best to have the front of the car slightly up to help drainage?

Scotty.
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Old 21 Jun 2007, 07:41 PM   #9 (permalink)
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Quote:
Originally Posted by SilverStreak View Post
I will drain it all out anyway, cause i don't know when it was last done. Is it best to have the front of the car slightly up to help drainage?

Scotty.
Hi
You might get more oil out lifting the front of the car but you need to lower it to fill to the correct level.

Kev
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