Frank@AutoSpeed

but i just looked it up

S4andTLS

the 2.3L includes the center diff. Are you sure you didn't get the numbers confused from your mechanic? Have him print out what his "source" is. He is lucky no one fills their tranny to 1.3L and then ruins it because of his bad info.

Frank@AutoSpeed

he said rear diff

findalex

Try searching for "Audi Fluid Capacity PDF"

Audi publishes a PDF that has the fluid capacity. Look for your model year range in the search results.

LJS

I find it interesting the stuff people find as useful advise on a forum-----
GEAR OIL- B5 Audi S4
Recommended oil-
FUCHS TITAN SINTOFLUID SAE 75W-80(synthetic) GL5 Fluid
* TRANNY and Center Differential
(2) Drain Plug- tranny and diff
(1) Fill Plug-Drivers Side
10mm HEX, 40 N-M, 2.3L capacity

* Rear Differential
(1) Drain Plug and Fill Plug- Pass Side
same tool, 1.9L capacity + 50grams of MoS2 (LIQUI MOLY p/n 2019)

Audi recommendation per manual-Both trans and rear diff
SAE 75W-90 PN G00 500 0 GL5 Synthetic

mannymua

liters are bigger than quarts.