Potential Manual Transmission Failure

[Corradobrit]

B8 has torsen type center diff and the B8.5 got a crown wheel type center diff

Not for the 6MT versions. Only DSG got the crown center diff

[ellwood]

Not for the 6MT versions. Only DSG got the crown center diff

interesting, i've never seen it differentiated between the two transmission types. thanks for the info

[sonic32]

interesting, i've never seen it differentiated between the two transmission types. thanks for the info

makes sense its only the DSG, the 6MT stayed the same up to the B9 A4. what are pros vs cons on torsen center vs crown center.
OP where are you located?

[Oloung1]

makes sense its only the DSG, the 6MT stayed the same up to the B9 A4. what are pros vs cons on torsen center vs crown center.

i was curious myself and found half of the answer: https://www.audi-mediacenter.com/en/...from-audi-2841.

The crown-gear differential
Exactly 30 years after the debut of the first quattro, Audi introduced a new, innovative evolutionary stage of its permanent all-wheel drive system for longitudinal front-mounted engines – the quattro drive with crown-gear differential and torque vectoring.

Inside the new center differential used in the RS 5, the A7 Sportback and the new A6 are two rotating crown gears that owe their name to the crown-like design of their teeth. The rear crown gear drives the propeller shaft to the rear-axle differential while the front crown gear drives the output shaft to the front-axle differential. The crown gears mesh with four rotatable pinion gears. They are arranged at right angles to each other and are driven by the differential’s housing, i.e. by the transmission output shaft.

Under normal driving conditions, the two crown gears rotate at the same speed as the housing. Because of their special geometry, they have specifically unequal lever effects. Normally 60 percent of the engine torque goes to the rear differential and 40 percent to the front differential.

If the torques change because one axle loses grip, different speeds and axial forces occur inside the differential and the adjacent plate packages are pressed against one another. The resulting self-locking effect subsequently diverts the majority of the torque to the axle achieving better traction; up to 85 percent can flow to the rear. Conversely, if the rear axle has less grip, the opposite happens; up to 70 percent of the torque is correspondingly diverted to the front axle.

Thanks to this even wider range of torque distribution, the crown-gear differential surpasses its predecessors to facilitate even better traction. Forces and torques are redistributed utterly consistently and without delay. The mechanical operating principle guarantees maximum efficiency and instantaneous responsiveness. Other strong points of the crown gear differential are its compactness and low weight – at 4.8 kilograms (10.58 lb) it is roughly two kilograms (4.41 lb) lighter than the previous component.

Audi couples the crown-gear differential with an intelligent brake management software solution called torque vectoring. The software can act on each of the four wheels individually, and the new system makes cornering even more precise and dynamic.

When cornering at speed, the software uses the driver’s steering input and desired level of acceleration to calculate the optimal distribution of propulsive power between all four wheels. If it detects that the wheels on the inside of the curve, which are under a reduced load, will soon begin to slip, it marginally brakes these wheels – just slight application of the pads on the disks at minimal pressure is all that it takes.

This action by the differential enables the outside wheels to apply more torque to the road. This assistance is provided smoothly and continuously. The car remains neutral noticeably longer; understeer while turning and accelerating is practically eliminated. Last but not least, the ESP intervenes later and more gently – if any intervention at all is necessary.

cliffs: basically the crown type is faster, has a wider torque distribution bias, and 40% lighter than the torsen type. plus is it 10000% mated & designed for the sport diff. so IRL any or all torsen center diff cars are not fully utilizing the powers of the sport diff

gl op with the your findings!

[sonic32]

i was curious myself and found half of the answer: https://www.audi-mediacenter.com/en/...from-audi-2841.



cliffs: basically the crown type is faster, has a wider torque distribution bias, and 40% lighter than the torsen type. plus is it 10000% mated & designed for the sport diff. so IRL any or all torsen center diff cars are not fully utilizing the powers of the sport diff

gl op with the your findings!

Yeah but none of those cars mentioned are manual. I guess us manual guys got shafted on something else besides shitty clutches lol


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[TSTARKZ]

makes sense its only the DSG, the 6MT stayed the same up to the B9 A4. what are pros vs cons on torsen center vs crown center.
OP where are you located?

I'm on long island in NY


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[sonic32]

I'm on long island in NY


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Shoot me a PM. I’m in queens we can meet up I’m curious to see what it sounds like I might be able to help


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[ellwood]

Not for the 6MT versions. Only DSG got the crown center diff

for what it's worth, post #187 in the following build thread from member Lensch09 indicates that his 2016 6MT had the crown wheel differential... unfortunately all the photobucket links are broken

http://www.audizine.com/forum/showth...ld-(6MT)/page5

[grovlet]

for what it's worth, post #187 in the following build thread from member Lensch09 indicates that his 2016 6MT had the crown wheel differential... unfortunately all the photobucket links are broken

http://www.audizine.com/forum/showth...ld-(6MT)/page5

Psst - you can enable an extension in Google Chrome that turns them back on!!

[Corradobrit]

for what it's worth, post #187 in the following build thread from member Lensch09 indicates that his 2016 6MT had the crown wheel differential... unfortunately all the photobucket links are broken

http://www.audizine.com/forum/showth...ld-(6MT)/page5

Everything I've read and heard says that's not the case. The 6MT got the Torsen system. Perhaps there was a redesign for the 2016 MY.
https://www.youtube.com/watch?v=nBbKLIjrUSg