S2000 Under The Hood S2000 Technical and Mechanical discussions.

Diff & Tranny

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Old Jun 27, 2005 | 11:27 PM
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Thumbs up Diff & Tranny

I just went to Honda Dealer and ask for Manual Transmission fluid & Rear Diff fluid. They sold me 'MTF Plus' SAE 75W-80 API GL4 (part no. B1710) for the tranny. HGO 'Hypoid Gear Oil' SAE 90 API GL5 (part no B1720) for the diff. Are these the right fluids for our car?

how do I post pics?? I've taken pics of the bottles but don't know how to post.
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Old Jun 28, 2005 | 03:40 AM
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Honda MTF is much closer to 10w30 engine oil, not a 75w80 gear oil.

The 90W gear oil is fine for the diff, but I wouldn't put the 75w80 in the trans.
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Old Jun 28, 2005 | 07:07 AM
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Isn't SAE ratings for crankcase oil a bit different from those of gear oils? Not sure if it makes any difference, but he's "down under".
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Old Jun 28, 2005 | 08:44 AM
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The 90w GL5 is the right oil for the diff. This is the correct fluid for the tranny.


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Old Jun 28, 2005 | 10:22 AM
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[QUOTE=RACER,Jun 28 2005, 09:44 AM] The 90w GL5 is the right oil for the diff.
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Old Jun 28, 2005 | 11:16 AM
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Originally Posted by xviper,Jun 28 2005, 11:22 AM
"Many people have the misconception that SAE numbers are a continuous series, and that the higher the SAE number, the higher the viscosity. They are unaware that, in general, the viscosity of SAE 30 motor oil is similar in viscosity to SAE 90 gear oil."
This is excerpted from:
http://www.tsmoly.com/faq_vis.htm
This is very puzzling. Does that mean that I can use 10w-60 in my crankcase





Dave
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Old Jun 28, 2005 | 12:42 PM
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10w-30 is very close to a 75w-80 they just use a different chart, one uses a sae engine oil chart and the other is on the sae GEAR oil chart. Go Here to see the charts
Road Rage could explain it much better
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Old Jun 28, 2005 | 12:56 PM
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Originally Posted by xviper,Jun 28 2005, 08:07 AM
Isn't SAE ratings for crankcase oil a bit different from those of gear oils? Not sure if it makes any difference, but he's "down under".
That is correct.

If I remember correctly, a 75W-90 gear oil is roughly the same viscosity as a 10w-40 (or motor oil. That's why you can use motor oil in a pinch for a manual transmission.
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Old Jun 28, 2005 | 01:22 PM
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Originally Posted by Hondassport,Jun 28 2005, 01:42 PM
10w-30 is very close to a 75w-80 they just use a different chart, one uses a sae engine oil chart and the other is on the sae GEAR oil chart.
that explains everything


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Old Jun 28, 2005 | 01:55 PM
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Anyway, the point is, I believe that Bobble can, in fact, use his "MTF Plus" in his tranny because that's probably how it's badged where he lives. Agreed? No?
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