Oil alternatives to G.052.549.A2 (gear oil)?

[Argis96]

Hello,
My vehicle: Audi A4 B9, 2 TFSI, 185kw quattro, 2018, with OCJ transmission.
Long story short, I had to drain my gear unit oil in my B9, it's wasn't an option, I had to. So now I'm on a crossroad, what gear oil to buy, the OEM code is G.052.549.A2 / G052549A2 but the price is not justified. I've found one post that suggested to use any 75W GL-4 gear oil. Can anyone confirm or deny this? Or reccoment any alternative gear oil for the gear unit? Thank you in advance.

[calebcaleb]

Im pretty sure the 75W GL-4 is for the gearbox or the rear differential fluid. G052549A2 is the ATF or mechatronic fluid for DCT, you can also use liquimoly 8100. Use their website to verify to prevent future headaches.

[Nillious]

529A2 is the for the mechatronic and clutch. The rear diff will probably be a GL5 oil. GL4 will go in the gearbox section. As far as what oil it is equivalent to we don't know. Nobody list anything as equivalent or suitable for that number. Any GL4 would be fine for the gears but it's how it may affect the center diff is what you have to worry about. Wrong friction modifiers could cause chatter or worse slippage.