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hi all,

have searched all forums but couldnt find anything on any. i am trying to find out the following for the B5 S4:

-gear ratios 1-6
-final drive (and any other gear ratios that are appropriate)
-drag coeffs (have found avant=0.31 and saloon =0.33 is this right?)
-frontal area i can measure it but could do with 'official' value

any help is much appreciated.

Kyle

thats the kind of thing i'm after - thanks

don't suppose you could send me that excel file that was used to make that, may save me a while!
my username @ blueyonder . co . uk

Sorry mate got it from another thread like that.

Looking at that, very interesting.

Do you know where I can find the gear ratios for the RS4 B5 or even the RS6 to compare?

Thanks

still looking for the actual ratios. those numbers are a bit out, so if you come across them anywhere for the s4 pls let me know. have hunted high and low already with no luck (thats for ratios of any kind (S4/RS4 etc... ))...

Rather than start a new thread thought I would drag up an oldie.

I have also searched for these ratios but can't find any. Did you find them Kyle?

Is any one else able to help. I'd like the ratios for the S4 and RS4 gearbox to see where they differ.

Many thanks,
John

John, check this out:

http://www.elektro.com/~audi/01E/

John

I think I saw the ratios in Elsawin, I'll try and have a look a bit later on

Cheers

Mike

John

This should help

Gearbox identification
Code letters, assignment of mechanical units, transmission ratios, capacities

Manual gearbox
Code letters DSY EDU
Manufactured from 05.97 07.99
to 12.98 10.00
Assignment Model Audi A4 1995 > Audi A4 1995 >
Engine 2.7l - 195 kW - S4 2.7 l - 184 kW - S4
Transmission ratio Final drive 37 : 9 = 4.111 37 : 9 = 4.111
Z2 :Z1=i 1st gear 28 : 8 = 3.500 28 : 8 = 3.500
2nd gear 34 : 18 = 1.889 34 : 18 = 1.889
3rd gear 32 : 26 = 1.231 32 : 26 = 1.231
4th gear 29 : 30 = 0.967 29 : 30 = 0.967
5th gear 29 : 36 = 0.806 29 : 36 = 0.806
6th gear 26 : 38 = 0.684 26 : 38 = 0.684
Reverse gear 38 : 11 = 3.455 38 : 11 = 3.455
Code letters DSY EDU
Speedometer Electronic
Capacity 3.4 litres 1)2) 2.5 litres 1)
Specification Gear oil G 052 911 A SAE 75 W 90 (synthetic)
Clutch mechanism Hydraulic
Clutch plate ø 240 mm 3)
Drive shaft flange ø 108 mm 108 mm
itot in top gear 2.813 2.813
Rear final drive assignment
Code letters DQA DQA
1) Reduced oil quantity
2) Oil quantity includes 0.3 l for gear oil cooler and oil pipe. Oil cooler and oil pipe must be completely drained on replacing gearbox.
3) With dual-mass flywheel
4) For triple roller joint/drive shaft with centring diameter 130 mm

Manual gearbox 6-speed 01E Four-wheel drive
Code letters FDP FRQ
Manufactured from 11.00 04.01
to 04.01 09.01
Assignment Model Audi A4 1995 > Audi A4 1995 >
Engine 2.7l - 280 kW - RS4 2.7l - 195 kW - S4
Transmission ratio Final drive 37 : 9 = 4.111 37 : 9 = 4.111
Z2 :Z1=i 1st gear 28 : 8 = 3.500 28 : 8 = 3.500
2nd gear 34 : 18 = 1.889 34 : 18 = 1.889
3rd gear 33 : 25 = 1.320 32 : 26 = 1.231
4th gear 30 : 29 = 1.034 29 : 30 = 0.967
5th gear 29 : 36 = 0.806 29 : 36 = 0.806
6th gear 26 : 38 = 0.684 26 : 38 = 0.684
Reverse gear 38 : 11 = 3.455 38 : 11 = 3.455
Code letters FDP FRQ
Speedometer Electronic
Capacity 3.4 litres 1)2) 3.4 litres 1)2)
Specification Gear oil G 052 911 A SAE 75 W 90 (synthetic)
Clutch mechanism Hydraulic
Clutch plate ø 240 mm 3)
Drive shaft flange ø 108 mm 108 mm
itot in top gear 2.813 2.813
Rear final drive assignment
Code letters DQA DQA
1) Reduced oil quantity
2) Oil quantity includes 0.3 l for gear oil cooler and oil pipe. Oil cooler and oil pipe must be completely drained on replacing gearbox.
3) With dual-mass flywheel
4) For triple roller joint/drive shaft with centring diameter 130 mm

Manual gearbox 6-speed 01E Four-wheel drive
Code letters FTG
Manufactured From 04.01
To 09.01
Assignment Model Audi A4 1995 >
Engine 2.7 l - 184 kW - S4
Transmission ratio Final drive 37 : 9 = 4.111
Z2 :Z1=i 1st gear 28 : 8 = 3.500
2nd gear 34 : 18 = 1.889
3rd gear 32 : 26 = 1.231
4th gear 29 : 30 = 0.967
5th gear 29 : 36 = 0.806
6th gear 26 : 38 = 0.684
Reverse gear 38 : 11 = 3.455
Code letters FTG
Speedometer Electronic
Capacity 2.5 litres 1)
Specification Gear oil G 052 911 A SAE 75 W 90 (synthetic)
Clutch mechanism Hydraulic
Clutch plate ø 240 mm 3)
Drive shaft flange ø 108 mm
Itot in top gear 2.813
Rear final drive assignment
Code letters DQA
1) Reduced oil quantity
3) With dual-mass flywheel
4) For triple roller joint/drive shaft with centring diameter 130 mm

Manual gearbox 6-speed 01E Four-wheel drive
Code letters FTU FZV 5) FZW 5)
Manufactured from 04.01 01.02 01.02
to 09.01
Assignment Model Audi A4 1995 > Audi A4 1995 > Audi A4 1995 >
Engine 2.7 l - 280 kW - RS4 2.7 l - 195 kW - S4 2.7 l - 280 kW - RS4
Transmission ratio Final drive 37 : 9 = 4.111 37 : 9 = 4.111 37 : 9 = 4.111
Z2 :Z1=i 1st gear 28 : 8 = 3.500 28 : 8 = 3.500 28 : 8 = 3.500
2nd gear 34 : 18 = 1.889 34 : 18 = 1.889 34 : 18 = 1.889
3rd gear 33 : 25 = 1.320 32 : 26 = 1.231 33 : 25 = 1.320
4th gear 30 : 29 = 1.034 29 : 30 = 0.967 30 : 29 = 1.034
5th gear 29 : 36 = 0.806 29 : 36 = 0.806 29 : 36 = 0.806
6th gear 26 : 38 = 0.684 26 : 38 = 0.684 26 : 38 = 0.684
Reverse gear 38 : 11 = 3.455 38 : 11 = 3.455 38 : 11 = 3.455
5) Service gearbox for S4 and RS4; modified synchro-rings for 1st and 2nd gear (with carbon coating) and modified locking collar/synchro-hub for 1st/2nd gear
Code letters FTU FZV 5) FZW 5)
Speedometer Electronic
Capacity 3.4 litres 1)2) 3.4 litres 1)2) 3.4 litres 1)2)
Specification Gear oil G 052 911 A SAE 75 W 90 (synthetic)
Clutch mechanism Hydraulic
Clutch plate ø 240 mm 3)
Drive shaft flange ø 108 mm 108 mm 108 mm
itot in top gear 2.813 2.813 2.813
Rear final drive assignment
Code letters DQA DQA DQA
1) Reduced oil quantity
2) Oil quantity includes 0.3 l for gear oil cooler and oil pipe. Oil cooler and oil pipe must be completely drained on replacing gearbox.
3) With dual-mass flywheel
5) Service gearbox for S4 and RS4; modified synchro-rings for 1st and 2nd gear (with carbon coating) and modified locking collar/synchro-hub for 1st/2nd gear

Manual gearbox 6-speed 01E Four-wheel drive
Code letters FZY 5)
Manufactured from 01.02
to
Assignment Model Audi A4 1995 >
Engine 2.7 l - 184 kW - S4
Transmission ratio Final drive 37 : 9 = 4.111
Z2 :Z1=i 1st gear 28 : 8 = 3.500
2nd gear 34 : 18 = 1.889
3rd gear 32 : 26 = 1.231
4th gear 29 : 30 = 0.967
5th gear 29 : 36 = 0.806
6th gear 26 : 38 = 0.684
Reverse gear 38 : 11 = 3.455
5) Service gearbox for S4 and RS4; modified synchro-rings for 1st and 2nd gear (with carbon coating) and modified locking collar/synchro-hub for 1st/2nd gear
Code letters FZY 5)
Speedometer Electronic
Capacity 2.5 litres 1)
Specification Gear oil G 052 911 A SAE 75 W 90 (synthetic)
Clutch mechanism Hydraulic
Clutch plate ø 240 mm 3)
Drive shaft flange ø 108 mm
itot in top gear 2.813
Rear final drive assignment
Code letters DQA
1) Reduced oil quantity
3) With dual-mass flywheel
5) Service gearbox for S4 and RS4; modified synchro-rings for 1st and 2nd gear (with carbon coating) and modified locking collar/synchro-hub for 1st/2nd gear

Mike,

That's brilliant, thanks for all of that.

To summarise then:
S4 with gearbox code DSY has the same gear ratios as the early RS4 box that had the potential 1st and 2nd gear synchro fault coded FDP.

The later RS4 gearboxes (code FTU) and those replaced under warranty (code FZW) have different ratios for 4th and 5th gears.

They all have the same final drive.

So, finally what is the difference between the S4 and RS4 gearbox, gear ratios aside for the later versions?

Thanks,
John

After doing more research have also found that the Torsen bias ratios are 4:1 for RS4 and 2:1 for S4. Hence the RS4 can deliver 80% to one axle, S4 66%.

I really need to know what other advantages there are to fitting the RS4 box over the S4 one.

And soon!

Thanks for any help,
John

Other than the one advantage I have posted above (Torsen bias ratio) is there any other reason to fit an RS4 box?

It seems a few people do it but other than the above I see little difference.

Thanks,
John

QuantumJohn wrote:Other than the one advantage I have posted above (Torsen bias ratio) is there any other reason to fit an RS4 box?

It seems a few people do it but other than the above I see little difference.

Thanks,
John

I've read in various places that the later RS4 gearboxes are stronger than earlier ones and all S4 versions. Not sure if thats true.

The lower ratios and better TorSen bias are both good reasons IMO.

Let us know if you find anything else John

QuantumJohn wrote:After doing more research have also found that the Torsen bias ratios are 4:1 for RS4 and 2:1 for S4. Hence the RS4 can deliver 80% to one axle, S4 66%.

I really need to know what other advantages there are to fitting the RS4 box over the S4 one.

And soon!

Thanks for any help,
John

Well,

You see I thought the same. But then I checked with Stasis because they even mention the 2:1 S4 and 4:1 RS4 difference on their webpage. They admit that the text is misleading as they wanted to write you can get closer to the RS4 B7 feel.

Anyway, they said in all the RS4 boxes they have done they have yet to find a 4:1 ratio torsen.

They modified my RS4 torsion from 2:1 to 4:1. And also if you check in ETKA you will find that the S4 torsen has the same P/N as the RS4 torsen. 01e 409 751 f

So, the 4:1 split in the RS4 seems to be a wide spread myth!

Dave