Search the Community

Hi guys, I have just bought a 2018 A5 2.0L Petrol Quattro (252ps) with 60k miles from a private seller (First Audi) Basic visual inspection, test drive were fine and it had a full Audi service history so was reassured. Shortly after sale I noticed a deep thumping from underneath the driver/passenger seats/ possibly a bit further back. It seems to happen in high torque situations, e.g. at low speed uphill, while gently applying the throttle. Specifically immediately after a gentle throttle pulse, I'll get a thump. Then when accelerating off, it will happen at a slightly higher frequency 'thump thump thump' as I'm pulling away...you can feel it more than you can hear it. It's irregular, not a rhythmic beating but more random. Furthermore when steering is locked and I accelerate, it happes at a very high frequency and becomes more like a rapid thumping that blends into a rumble. I took the car to my local mechanic who said no issues, just a loose undertray. Then took it to an indie who has experience with Audis and he found the rear transfer case of the gearbox is rattling badly - and thinks this is failing mechanically (videos attached of the rattle, more obvious on short clip). He also thinks replacing the gearbox will resolve the issue with the thumping. I was initially wondering whether it was a propshaft bearing issue from reading other forums. It was difficult to recreate the thumping noise with the car on the ramp and the wheels floating. Obviously the gearbox / rear transfer case does seem to have an issue and it's looking like a costly repair. Just wondering if anyone had any thoughts as to whether this is a complete replacement job, and whether this might be causing that deep thumping noise as well or is that possibly something else that will need doing? Regretting slightly the private sale at the moment. Shame as the car has been a beaut to drive until now. Thanks in advance 20250430_165306_2.mp4 20250430_165306_1.mp4

This is a strange one to me so maybe someone here has or had same problem and can maybe enlighten me . A4 Quattro 2.0t b7 , usually after a bit of a drive ..I’d park up nip into a shop say then reverse or drive car forward and get a weird grinding or rumble from on of or both wheels , I’m saying wheels as seems obvious choice , goes away once speed is up and when traveling at normal speeds feel or hear no noise . Car has just 109k and not been bad used with FSH , any help folks would be appreciated.

Hi al just became a member. Been wanting to join a forum for a while but never got around to it. Im hoping someone can shed a light on my Mrs Audi A3 , this afternoon im in Preston remapping a car fitting bigger injectors and other bits for a customer and my good lady rings me and the way she is talking I thought she was being kidnapped. I say calm down what's up she says " I'm stuck in the middle of a junction and the car won't move when I accelerate" I tell her I'm in Preston and can't do much. Eventually I finish what I'm doing and shoot of back to Blackpool as quick as the rs4 will go. I find her sat in her Audi at the side ot the road. Lift the bonnet and tell her to start it. Then say go through the dsg gear side and also the auto side.both driveshafts spin but the wheels don't turn. I tell her to do it again and same thing happens. I ring my pal and tell him to meet me at he car when he can, I take the Mrs home and a couple of hours later my buddy turns up. We go to the car to tow it back to mine. Attach it to his car and we pull off. That's when I hear and feel the drive shaft knocking and banging as if the drive shaft has snapped in the cup at one end, same noise my driveshaft made when I did it in at Santa pod. are the Audi A3 driveshafts known to go at the bearing cup or is there a fault with the dsg box there was no noises she said she just set off from the lights and it just wouldn't go anywhere. The clutch was changed 6 months ago, t only reason it's confusing me is that he drive shafts spin up when accelerate but don't turn the wheel. And there's no driveshaft noise till the wheel turns. Im going to jack it up today but can't be bothered taking the driveshaft out unless it's defo that , if not I'll take it to my garage and whip t gearbox off and rebuild it if I have to.. any my help anyone had this problem before please let me know thanks in advance