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  #1  
Old 10-21-2004, 04:17 PM
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redline synthetic what weight?

i plan on changing my diff. fluid to redline synthetic to help reduce the noise coming from the diff. my question is what weight should i use?
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  #2  
Old 10-21-2004, 04:28 PM
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Always use gear oils with 75W-90 or 80W-98 rating for regular Mercedes cars.

Eric
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Old 10-21-2004, 04:41 PM
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Unless your differential is a limited slip variety, use 75W90 see:
http://www.redlineoil.com/pdf/5.pdf
I just got two jugs in the UPS for my '87 300D rear end
I doubt the noise will go away though, that usually is a sign of worn bearings. BTDT.
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Old 10-21-2004, 11:04 PM
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Dieseldiehard has it right. You want the 75W90 and yes it may help but won't probably make the noise go away. If you haven't used synthethic oil there before plan on changing it again after about 10,000 miles or so because that stuff really cleans out all the gunk.
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Old 10-23-2004, 10:05 PM
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how much do i need?
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  #6  
Old 10-25-2004, 02:59 PM
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Around 1.1-1.2 quarts.

ERic
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