greek1234

I am having to replace my tranny and have found a 2002 from an s8. Are these interchangeable.

Any help greatly appriciated.

Thanks
greek

mclarenm8d

The final drive ratio of the S8 is much more aggressive than the A8. The intermediate gears in the tail housing and the front ring and pinion are different between the two.

So, if you want the aggressive gearing of the S8, you will also need the rear ring and pinion from the S8/S6, I believe the manual tranny S4's rear ring and pinion will work as well.

Audi does some weird stuff with the ratios in the tail housing of the transmission to get the front and rear ring and pinion math to work out.

I e-mailed to Paul the other day, one of my comments was that sooner of later someone would get to try this.

So ... if you decide you don't want to do this, I might be interested in how much you would want for the S8 transmission, or how much the one you found is going for.

KaMaKaZieP -ALUMIN8-

How do you like your modifed stall speed?

ryoung

The table in the lower right shows an A8/S8 Tiptronic with the S8's final drive.

<img src="http://pictureposter.audiworld.com/17157/speed-in-gear.jpg">

Jkay

LOWERING the stall speed reduces the available torque thus making the car more placid and mild. When he says it "pulls better", that is in direct contradiction to what LOWERING the stall speed does, physically.

PaulW

If you don't use it, I would be interested in buying it

awdinut

I have not known of a 00-03 trans failing, and since I have a 2000, I am anxious to find out what symptoms did yours exhibit and at what miles?

tozoM8

You will have better acceleration from start, but less torque after.

mclarenm8d

Labor and parts is pretty pricey, I haven't checked the forum to see if you have tried Paul's site for fixes.<ul><li><a href="http://www.audipages.com/Tech_Articles/auto_transmission.html">http://www.audipages.com/Tech_Articles/auto_transmission.html</a</li></ul>

mclarenm8d

Jack, I responded to your e-mail.