Where is the flex disc located on a Mercedes?
The front flex disc. The one in the front connects the tranny to the driveshaft while the one in the back connects the driveshaft to the differential. The rear flex disc. The rear is easier to find, as it is conveniently located between the drive shaft and the rear differential.
What are the symptoms of a cracked flex disc?
When a flex disc is cracked, falling apart, or missing its bolts, these symptoms start to appear: Excessive driveshaft movement resulting in abnormal vibration in the center floor. A feeling of a “rough shift” when putting the car in reverse and when shifting to drive.
How much does it cost to replace Mercedes flex disc?
Mercedes Flex Disc Replacement Cost. If you have an auto repair shop replace the flex disk on your Mercedes-Benz expect to pay between $300-$500 depending on your location and model of MB. If you do it yourself you can spend around $100 for the Mercedes-Benz Genuine flex disk.
What causes a second order vibration on a drive shaft?
A second order driveshaft vibration will cause two shakes or disturbances for each revolution of the drive- shaft. A component that’s out-of-balance will never cause a second or higher order vibration, only a first order vibration. Second order driveshaft vibration is usually caused by incorrect vehicle trim height,…
Do you need to replace the driveshaft flex disc?
To access the driveshaft flex-disc, you have to remove the exhaust system or lower it about eight inches. When replacing, at the minimum, replace the self-locking nuts that attach the driveshaft flex-disc. I prefer to replace the bolts too. The driveshaft flex-disc is also referred to as the giubo.
Why do I need a flex disc in my Mercedes?
Look at the output shaft of the transmission which falls approximately in the middle of the vehicle. When a car accelerates or decelerates beyond the normal force, a flex disc helps absorb the excess torsional loads. When the tranny transfers power to the differential, the flex disc isolates the driveshaft from vibration.
What should I do if my driveshaft is vibrating?
For a thorough inspection of the driveshaft, remove it from the vehicle. This will allow you to exercise the universal joints through their full range of motion and check for any wear or binding. It’s easy to miss bad U-joints when the shaft is installed on the vehicle.