S3 rear differential

[kachnak]

Hello, I hear some bad sound from rear side my car, but only when I start moving from 0km/h and steering wheel is fully left or right. When I start moving forward there is no bad sound. I hope that will be rear wheel bearings, but my friends said it will be differential. What do you think? I will go to my mechanic next week.

Is it possible replace audi S3 1999 210hp rear differential by audi TT 2002 225hp differential? Are they same?
Thank you.

 

[god_thats_quick]

Should be the same diff (on all mk4 based cars), however you might want to swap your controller to the new diff assuming that's okay.

 

[barters3]

Try changing your haldex oil and filter if you havent already. Under the same driving conditions you mentioined,i used to get a grinding noise. I changed the above and it was sorted.

 

[kachnak]

Thank you. So I try to change oil and filter. Do you know what type of oil must be used there?

 

[barters3]

It's special haldex oil, it's available from vw or audi dealers and should be about a tenner. I can't remember how much the filter is but it's not expensive. It sorted the problem I had so hopefully you'll be lucky

 

[tompearson]

Just to let you know - I just had my oil and filter changed yesterday and it also cured this issue for me.

 

[barters3]

glad to be of assistance! Lol.

 

[s4mark]

i too have a vibration coming from the rear wheels when moving off from standstill on either left or right full lock. will try oil replacement and hopefully will sort the problem