2004 Audi s4. After a trip we noticed that the car had some vibration in the stick shift. The next day the engine was running rough(vibrating) upon start and driving it. I also noticed when you push out the clutch it doesn't seem to want to move today. We were told they would pull out the transmission that it could be that....what are your thoughs. No engine code has popped up. All igition coils have been replaced. That was my first thought.

The best test for this is a cooling system pressure test. You need to have that done. The other thing to check are the freeze plugs.

Sounds like you need new engine mounts

Has the vehicle not been at a repair shop for
a couple of days, so it can be driven & the issues
figured out

All your doing is telling us the place you went can't
diagnose a vehicle

That sadly, is what we try to respond to hundreds
of times a week

When a vehicle runs rough & vibrates, you can not
come on here & say a shop can't find anything wrong,
when you can

The vehicle has to be properly diagnosed

We can't guess & you won't understand any
solutions or be in a position to tell a shop how
to do their job

Flashing check engine light is a SERIOUS misfire. Read this post
Flashing check engine light is serious Ricks Free Auto Repair Advice

That mechanic wasn't lying. I currently own three of them and I know a lot of people that own them and they all have a rough idle. The engines are internally balanced and they don't have dampeners, so you get the engine vibration transferred to the car and that is what you are feeling.

Dear Madam or Sir,

this is a well known problem with the Audi-transmissions, we do have a lot of failures with them over here in Germany. ;)

There are some software updates available, in many cases this fixed the problem.

Another possibility is a faulty transmission speed sensor, this is causing the hard shift behaviour.

First you should see the dealer to check the transmission control module´s trouble code memory and to check if there is a software update available for your car.

check the fuel lines for bends/ pressed points check fuel filter may be clogged check spark plugs and wires

Are you getting any error codes? Is the check engine light on and/or blinking? The vibrating and other symptoms you described are common from shorted ignition coils. It also sounds like there's a separate issue with power steering - check your fluids, pump, and hoses.

check out harmonic balancer .

IS YOUR LOUD VIBRATION A LOUD RATTLE IF SO IT COULD BE YOUR CAT BREAKING UP THIS WILL CAUSE BAD RUNNING ..GIVE YOUR ENGINE A GOOD REV 3 or 4 TIMES OUT OF GEAR AND LISTEN FOR A RATTLE,,,,, HOPE THIS HELPS IF NOT CHECK THAT THE EXHAUST IS NOT BLOCKED ?? BEST OF LUCK-ELL BOY.