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It is official, 2013 S4 with s-tronic have Crown Gear differential

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Old 08-30-2012, 09:40 AM
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Default It is official, 2013 S4 with s-tronic have Crown Gear differential

It is official, Audi has confirmed during a progress event in Colorado last month that the 2013 S4 models with s-tronic transmissions have the Crown Gear differential:
Old 08-30-2012, 09:52 AM
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Nice find. It's @ 6:30.
Old 08-30-2012, 10:53 AM
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This was in doubt?
Old 08-30-2012, 11:14 AM
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Originally Posted by moose_head
This was in doubt?
nope.
Old 08-30-2012, 11:59 AM
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Originally Posted by moose_head
This was in doubt?
There was no reference to "Crown Gear" in the US or Canadian sites in the S4 specifications (just say "Self-locking center differential "), however "Crown Gear" is mentioned in the S5 specifications: "Crown gear (S tronic® dual-clutch transmission) / Self-locking (manual transmission)"
Old 08-30-2012, 05:41 PM
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It's been mentioned in the reviews of the 2013 S4 and Audi has confirmed this to people individually when they've emailed them.

Check out this tweet from Audi Canada yesterday to someone:

https://twitter.com/AudiCda/status/240826037360009218

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Last edited by JohnEnglish; 08-30-2012 at 05:43 PM.
Old 08-30-2012, 05:53 PM
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No better than the torsen, except for the 5lb weight reduction, which is pretty insignificant in a car with seats that weigh 150lb.

I don't want a center differential that biases torque around. I want it to lock and send an equal amount of power to both axles. This is how the Evo X ACD and Subaru DCCD works.

Then again, that doesn't make for a sexy sales pitch as 'from the wheels that slip to the wheels that grip', does it?
Old 08-31-2012, 09:32 AM
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Originally Posted by audiblitz
No better than the torsen, except for the 5lb weight reduction, which is pretty insignificant in a car with seats that weigh 150lb.

I don't want a center differential that biases torque around. I want it to lock and send an equal amount of power to both axles. This is how the Evo X ACD and Subaru DCCD works.

Then again, that doesn't make for a sexy sales pitch as 'from the wheels that slip to the wheels that grip', does it?
I believe the Torsen differential is "open differential" when there is zero traction on one of the axles (needs some torque to work) and only locks with electronic means when a slip is detected. The Crown Gear differential always locks mechanically so it works even when the electronic stability control is off. This weakness of Torsen (with ESC off) has been exploited by some Audi competitors who put cars on rollers and cause the Audis to get stuck (mostly Q5's, see several videos on Youtube). Having said that I have been driving an A4 with Torsen for 14 years in Canadian winters with heavy snow and ice conditions and never got stuck!
Old 09-01-2012, 06:23 PM
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Any pros and con listing with service?
Old 09-03-2012, 10:01 PM
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Originally Posted by Evlengr
Any pros and con listing with service?
whut?


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