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View Full Version : Tried searching but nothing, will an S4 tranny bolt up to a 1.8t?



Neo1130
01-16-2006, 09:41 AM
Anyone know the answer? I just want a 6 speed is all...

Daft
01-16-2006, 09:42 AM
Yes but, you'll need to change your rear diff to match the S4 trans.

Kruat
01-16-2006, 09:45 AM
So, will a S4 clutch work in a 1.8T tranny?

eisman
01-16-2006, 09:49 AM
I got this info from somone that did an entire S4 conversion of the A4.

To swap the trans, you will need:

The S4 trans itself (01E version) ((2001.5 is better))
The complete shifter mechanism
Complete S4 rear end
Driveshaft (I think)
S4 Sub-frame or you have to make a trans mount
Trannie mounts

Optional:
A new short shifter (old one will not fit)
Rear S4 Axles (Stronger I think)
Front S4 Axles (Much stronger)
- Requires new uprights
- Requires S4 brakes

Daft
01-16-2006, 09:50 AM
Originally posted by Kruat
So, will a S4 clutch work in a 1.8T tranny?

No.

The 1.8T tranny uses a 228mm clutch.

The 2.8 and the 2.7T use a 240mm clutch.

Neo1130
01-16-2006, 09:52 AM
soi pretty mucn not worth it huh!? are there any ohte rbenifits of this/ lowere rpms? quicker?

eisman
01-16-2006, 09:53 AM
A more common option is to put in a trans from a 2.8. The gears are taller and the swap is "just" a swap. You remove the 1.8 trans an put in the 2.8 trans (ok you have to use the driver's side mount from the 1.8).

I have it on good authority that a chipped K03 will provide enough power for daily driving. But the real fun would be a GT28RS with a .64 hotside setup. Mmmmmmm, I need to stop drooling and put my CC away.

Daft
01-16-2006, 10:09 AM
Like Eisman said, the 2.8 is a better deal. It's more of a swap.

Read through this thread to learn more about the 2.8 tranny swap and why it is the better approach:

http://audizine.com/forum/showthread.php?threadid=45667

Neo1130
01-16-2006, 10:11 AM
like i said, juast want 6sp

k0mpresd
01-16-2006, 10:21 AM
buy a b6

Daft
01-16-2006, 10:44 AM
Originally posted by Neo1130
like i said, juast want 6sp

That may be but,do you want it just to have another gear to row through or because you want more top speed/lower RPMs on freeway?

If you want more top speed and lower RPMs on the freeway, the 2.8 tranny will do that. It will also make the car faster in the first 3 gears alone.

My point is that the S4 trans and the 2.8 trans have the same effect in their highest gears.

eisman
01-16-2006, 11:04 AM
I too want 6th gear, but like Daft said, I want it for highway crusing. The 2.8 does this nicely and is a very nice mod that can be used in more than just highway applications. If you decide to drag or autox the car and go BT this trans will help you in both situations.

Neo1130
01-16-2006, 11:14 AM
maybe if I swap mine with the wifes, she won't notice!! hehehe

mike-2ptzero
01-16-2006, 11:18 AM
Originally posted by Daft
That may be but,do you want it just to have another gear to row through or because you want more top speed/lower RPMs on freeway?

If you want more top speed and lower RPMs on the freeway, the 2.8 tranny will do that. It will also make the car faster in the first 3 gears alone.

My point is that the S4 trans and the 2.8 trans have the same effect in their highest gears.


2.8 drops the rpms about 400-500 at 85 mph in 5th gear vs 5th gear of the 1.8t trans. The S4 4th-6th gears are equal to the 4th-5th gears of the 2.8, only difference is that the S4 gears are a closer ratio. So the 2.8 has the same effect with less mods and less money to spend. You can spend about $1000 for the used 2.8 trans and about $2500 for just the S4 trans along.

onemoremile
01-16-2006, 03:18 PM
getting the 2.8 trans means you also don't have to deal with the S4's notchy shifting.

Kurzer
01-16-2006, 03:23 PM
Originally posted by eisman


Optional:
A new short shifter (old one will not fit)
Rear S4 Axles (Stronger I think)
Front S4 Axles (Much stronger)
- Requires new uprights
- Requires S4 brakes

Do you happen to know if the front and rear axles will fit into a '96 2.8Q? I have the carbon fibre driveshaft already so if I could get stronger axles I'd be pretty happy.

TIA!
Kurz

mike-2ptzero
01-16-2006, 03:51 PM
Why would you need stronger axles? The stock ones seem to hold up just find while making 500 TQ or less. There have been a few S4's that have snapped their stock rears while launching with drag radials. Just dont understand why people think the stock OEM A4 parts wont hold when yet no one has pushed them to their limits yet.

Kurzer
01-16-2006, 06:32 PM
I just figure I'll need to replace them anyway, and why not, my car has broken everything else. So why not switch to some better parts while I'm at it? The only thing I know of for sure right now is my steering pump but I don't know about the axles until I have a chance to take a look at them.

bitterchild
01-16-2006, 07:21 PM
lol, wooosaa mike... wooosaa

juju4uofa
01-16-2006, 10:07 PM
Why in the world would you need an S4 rear diff? If it was because of the gearing differnce you'd also need a new front diff. If it were something to do with the drive shaft just get a custom shaft made. Am I missing something?

quickglx
01-16-2006, 10:14 PM
Originally posted by juju4uofa
Why in the world would you need an S4 rear diff? If it was because of the gearing differnce you'd also need a new front diff. If it were something to do with the drive shaft just get a custom shaft made. Am I missing something?

Yeah, the front diff is part of the trans professor

mike-2ptzero
01-16-2006, 10:25 PM
Originally posted by juju4uofa
Why in the world would you need an S4 rear diff? If it was because of the gearing differnce you'd also need a new front diff. If it were something to do with the drive shaft just get a custom shaft made. Am I missing something?

1.8t and 2.8 have the same front and rear diffs which is 3.889

S4 uses a 4.11 front and rear diff

So if you use a S4 trans(which has the 4.11 front diff in it) you need to switch the rear diff to the S4 diff.

TwentyValveB5
01-16-2006, 10:38 PM
Originally posted by bitterchild
lol, wooosaa mike... wooosaa

is that anything like the foosa?