DCT 335is Official Signs of a Failing Driveshaft

Here are the forewarning tell tail signs of a failing driveshaft on a N54 with DCT


1) "Excessive" vibration when car begins to spool between 2500k - 4000k RPMs


2) A Clacking sound or knocking sound, on launches, or hard acceleration on turns, as though something is slipping and not gripping, coming from the passenger side rear wheel. It can easily be mistaken for a bad CV joint on the half shaft


3) Your car stops moving and you hear grinding noise underneath your car :lol: stop pressing on the gas pedal and just call a tow truck


Where does it break ?





Here is another view. It is severed within the shaft circular area that houses bearings





How many did I break ? 3


Is it tuned related ? Not really, I have witnessed first hand it breaking on an all stock car which was a lease. Yes, the drive was an aggressive driver and loved to spin the wheel in 1st and 2 second.


Gears most common for it to make it fail ? 1st and 2nd gears regardless of wheel hop or not. the more torque the quicker to fail


Does wheel hop cause it ? Yes and no. Wheel hope is a contributor to it failing, it all depends oh how severe the wheel hop is. The first one I broke was on a wheel hop with no warning signs. The later driveshaft rarely to no wheel hop and it started to fail.


Roll racing is perfectly fine starting from 3rd gear. Just keep away from 1st and 2nd gear WOT


Solutions ? see posts below as this thread develops for more information (technically I am too tired to type solutions)


All vendors can contribute their solutions. However, please respect other vendor' solutions and opinions :) . Just suggest your own products or ideas without have to directly or indirectly involve another vendor. No hitting below the belt, no ear biting, no sucker punches allowed