RS

My A4 1.8TQ now has a six speed trans. I used all Audi OE parts with the exception of the left side mount which had to be fabricated.

In a nutshell here are the parts required:

6 speed trans (I used a NueS4)
S4 driveshaft
S4 rear diff
Swap all the CV flanges to 100 mm (or use s4 drive axles and keep the 108 mm CV flanges which will require the larger bearing carrier on the fronts)
S4 right mount
Modify A4 left mount
S4 shift linkage
S4 speed sensor and backup light connectors
6 speed release bearing mechanicals

All other a4 parts will work (including flywheel, clutch, slave cylinder, starter, etc)

If you can get the final drive in the six speed changed to 3.89 you can use the a4 rear diff, or swap the ring and pinion in the A4 diff to 4.11

Cost was $2,800 (not including clutch and short shifter) excluding labor.

3,200 rpm at 80 mph!

DustysA4

Did you do all the work yourself? What other mods are you running? Do you by any chance know the tq rating of the S4 box vs. the A4(1.8t) box?

Audiboy

great info!

®ob

And what final drive did you go with?

Yippers®

You don't wanna know .. you'd be twice as jealous .. lol

Audiboy

wouldn't it just be 4800?

LCP

This sounds like my S4's 6th gear, so 4.111

Lucas_Gchips

Great some one finally did it.
You should right up a article with pics.

I opted to got for RS2 6 speed kit for the 1.8T

It comes also with rear 4.11 gears
Really Strong 1st gear, stronger than in S4 box,
Close ratio as well.
I think the final upgrade price would be about the same as what you spent.

Once again well done..

xr4tic

He had the trans rebuilt, and IIRC, he had the hardened 1st gear put in.

WYSIWYG

cool! i hardly even use my 5th gear =). info: 3500rpm@80mph with my 2.8tranny on 1.8t