Hey guys, hope you’re all doing well.

My car is a 2002 WS6 A4 21K miles. I recently noticed that when I lightly accelerate and reach around 40 & 50 MPH the rpm drops & you can feel it lose power and there’s a minor shaking or vibration that lasts for a split second then it’s back to normal, It doesn’t happen all the time but when it does you’ll notice it. I recently had the car serviced (engine oil and filter changed, added a TA performance diff cover and 75W90 gear oil designed for cars with LSD). I drove the car for a few days and it was fine.

I’m sure that it’s something simple but I don’t know where to start.

I appreciate your help. Many thanks.

 

Its normal that tranny uses a pwm controlled TCC and you are feeling the TCC apply. With that few of miles and depending on how old the tranny fluid is change the trans fluid and filter and then go drive the **** out of it and put a few hundred miles on it. It's had someone who hasn't driven it much and the fluid is aged out and it flat needs to be driven.

 

thank you for the above reply brother 👍
I live overseas in UAE 🇦🇪. I’ve had the car for 3 years now, it had 15500 miles back then, To be honest I don’t really drive it that much (1-2 times a week).

I checked the transmission fluid when it first arrived and it was good. I’m afraid to change the transmission fluid due to the car’s age as I’ve heard it might damage the transmission. I’m pretty sure no one changed it from factory.

Is there a specific way to safely change it without damaging the tranny or any other components?

much appreciated

 

It will be fine changing oil on it that tranny it hardly has any miles on it and the additive package has wore out this is why you feel the TCC shudder when it applies.
Drop pan pop filter out dump pan let it drain 30-45 minutes reverse procedure. Fill it with 4-4.5 qts of whatever flavor you can get over there thats close to dex 6 spec. Start it make sure its at the add mark cold then drop it down and go drive it. Put 20-30 miles on it and then do it again so you will come closer to a full fluid change.

Then drive it a few hundred miles and it will probably be Aok.

 

much appreciated brother 👍 thank you for explaining the process.

 

I'd check the torque arm bushing on the transmission and transmission mount as well.

 

Anytime please update with results when completed if you don't mind. It always stinks when guys ask for help then disappear to leave us wondering if the repair or diagnostic etc was successful.

 

Got it brother 👍 it’s gonna take a while and I’ll have to put it on hold for now because supposedly there’s a storm ⛈️ coming after tomorrow. And summers are just way too hot to do anything.

luckily, I updated all my old threads, even the ones that were months old.