PDA

View Full Version : STaSIS diff installed - lots of pics



fred2ka4
03-14-2007, 03:12 PM
It wasn't all that hard and I dont have time to do a full write up now so I'll just let you see the pictures and I'll answer questions later. It was not that hard just awquard because of the position I had to work in. All I had to do was disconnect 6 allen head bolts for the diveline and 8 6-point torq head bolts for the diff as well as 4 10mm nut flanges for the drivline heatshield.


As you will notice from the pictures the differentials are different. Also not in the picture is the fact that the STaSIS diff is a little heavier due to more rotating mass, but it feels like a really solid unit. Here are the pics and let me know what you think.


http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff001.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff003.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff004.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff008.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff009.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff010.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff014.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff011.jpg

STaSIS DIFF

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff015.jpg

REGULAR DIFF

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff016.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff017.jpg

STaSIS DIFF

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff024.jpg

REGULAR DIFF

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff023.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff046.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff036.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff039.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff041.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff048.jpg

http://i78.photobucket.com/albums/j91/fred2ka4/STaSIScenterdiff050.jpg

All done. I used rtv high temp, high torque and sensor safe gasket maker, (orange) I used brake cleaner to clean out the inside of the new diff and to clean the surface where the gasket material was to be applied. I used RedLine 75w90 synthetic gear oil (3 qts) and a pump to fill the tranny. It used about 2.9 qts while the car was level. More details will come later.

AudiA4_20T
03-14-2007, 03:16 PM
NICE! this seems like such an underrated mod for the money

mike-2ptzero
03-14-2007, 04:24 PM
See you posted it in the right form this time. [:p]



Luckly you got the new torsen with the housing other wise you would have to pull the ring to remove it from the rear output shaft.


BTW the Stasis unit uses the 2.8 torsen body, this is why the stasis and stock 1.8 look different.

fred2ka4
03-14-2007, 04:31 PM
See you posted it in the right form this time. [:p]



Luckly you got the new torsen with the housing other wise you would have to pull the ring to remove it from the rear output shaft.

It doesn't take me long to learn from my mistakes.......[:D]

vitaliko
03-14-2007, 05:34 PM
nice, im still trying to get exhaust off
its a major pita with the milltek

Ado
03-14-2007, 05:50 PM
Congratulations on the install Fred. Looks like u you have done this before. When you go out for a test drive, drive it like you stole it. Lol. j/k

UCFQuattroguy
03-14-2007, 06:18 PM
Waiting for driving impressions once you start romping on it. I plan on doing the 4:1 on my A4 that sees PLENTY of auto-x duty

onemoremile
03-14-2007, 06:20 PM
Excellent. Let us know how you like it. This one is definitely on my list.

vitaliko
03-14-2007, 06:40 PM
yeah this one came from my car, the mid corner later g's you pull with this diff are pretty redicilous :)

onemoremile
03-14-2007, 06:50 PM
That's what I'm hoping for. This should be great on the track with the RA-1s and a good suspension setup.

ny02s4
03-14-2007, 07:05 PM
how does it perform?

fred2ka4
03-14-2007, 07:28 PM
I just finished it up last night and I drove my wifes car to work today so I have not had a real chance to put it to the test yet, but I will let you know my driving impressions tomorrow as I will be driving it to work and hitting all the on and off ramps a little harder than usual ............ [:D] [drive]

onemoremile
03-14-2007, 07:30 PM
Just don't do the "slide off the road backwards mod".

solowb5
03-15-2007, 08:26 AM
what improvements are you supposed to see from this mod? also what about the transfer case one they offer. what is that supposed to do?

fred2ka4
03-15-2007, 08:50 AM
what improvements are you supposed to see from this mod? also what about the transfer case one they offer. what is that supposed to do?


This is from STaSIS website:


Tuning the center differential provides one of the most significant performance gains available to the Quattro owner. The standard torsen center differential in the S4 and A4 provides a 2:1 torque distribution capability. This enables the end of the car with traction (generally the rear) to deliver twice the torque being delivered by the least tractive end of the vehicle (generally the front).



The STaSIS high bias torsen provides a dramatic improvement in negotiating a turn quickly and efficiently. Now your car can be 3 cars in one( front, all and rear wheel drive):



Hard braking leading into a turn
Car acts like a front wheel drive – torsen acts like an open differential when its not under power. Wheels turn independently and car control is improved.



Mid Corner, Throttle On
Car acts like an all wheel drive– torsen delivers equal amounts of power to front and rear wheels. This maximizes grip, allowing more power to be applied at this stage of a turn.



Corner Exit, Hard Acceleration
Car acts like a rear wheel drive car – front wheel slip is rediced because the torsen delivers up to 88% of the engine torque to the rear wheels where the most traction is.

BeeFiveQuattro
03-15-2007, 05:22 PM
So it sounds like it is just more of an open diff. (making it even more tricky to drive on a loose surface).
-potentially causing one to break loose upon corner exit (more fun; but also about the only advantage our cars have over a rwd car)
-I see the advantage being that it will kill any mid-turn understeer (but will hopefully retain some slight corner entry understeer... as I use that to help initiate a early drift)

-Can a new oem Torsen diff (3:1) be bolted up to our cars?





This is from STaSIS website:


Tuning the center differential provides one of the most significant performance gains available to the Quattro owner. The standard torsen center differential in the S4 and A4 provides a 2:1 torque distribution capability. This enables the end of the car with traction (generally the rear) to deliver twice the torque being delivered by the least tractive end of the vehicle (generally the front).



The STaSIS high bias torsen provides a dramatic improvement in negotiating a turn quickly and efficiently. Now your car can be 3 cars in one( front, all and rear wheel drive):



Hard braking leading into a turn
Car acts like a front wheel drive – torsen acts like an open differential when its not under power. Wheels turn independently and car control is improved.



Mid Corner, Throttle On
Car acts like an all wheel drive– torsen delivers equal amounts of power to front and rear wheels. This maximizes grip, allowing more power to be applied at this stage of a turn.



Corner Exit, Hard Acceleration
Car acts like a rear wheel drive car – front wheel slip is rediced because the torsen delivers up to 88% of the engine torque to the rear wheels where the most traction is.