Transmission & Drivetrain Gearboxes, Differentials, Clutches

Differences between S4C transmission and the Y21 transmission?

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Old Jul 1, 2013 | 08:53 AM
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dirtridernathan's Avatar
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Default Differences between S4C transmission and the Y21 transmission?

I was just wondering if someone can explain the differences in these 2 transmissions? I saw the Y21 has an LSD but is that all the difference?
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Old Jul 1, 2013 | 09:04 AM
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Default Re: Differences between S4C transmission and the Y21 transmission?

Same everything....both have 'optional' lsd
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Old Jul 1, 2013 | 10:10 AM
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Default Re: Differences between S4C transmission and the Y21 transmission?

There is nothing that is different between the 2?
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Old Jul 1, 2013 | 10:48 AM
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Default Re: Differences between S4C transmission and the Y21 transmission?

Some, maybe all of the Y21s have a big vent tube and vent cap, The S80 is smaller and I think S4C is the same. That's the only thing that comes to mind.
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Old Jul 2, 2013 | 12:40 PM
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Default Re: Differences between S4C transmission and the Y21 transmission?

What do you mean vent tube and vent cap?
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Old Jul 2, 2013 | 12:57 PM
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Default Re: Differences between S4C transmission and the Y21 transmission?

There's a small breather on the top of the trans with a rubber cap.
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Old Jul 2, 2013 | 08:49 PM
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Default Re: Differences between S4C transmission and the Y21 transmission?

Thanks!
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Old Jul 13, 2013 | 05:24 PM
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Default Re: Differences between S4C transmission and the Y21 transmission?

s80's have big vent tubes too on the obd1 trannys
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