1. Clutch Installation Issues:
* Flywheel: The most common culprit. Was the flywheel resurfaced properly before installation? Even slight warping or damage can cause significant vibration. A resurfaced flywheel that wasn't properly cleaned or had imperfections will transmit vibrations to the drivetrain.
* Clutch Disc Alignment: An improperly aligned clutch disc will lead to uneven pressure and vibration. Was the clutch disc installed correctly and centered? Was a clutch alignment tool used?
* Pressure Plate: A damaged or improperly installed pressure plate can cause uneven clamping force, resulting in vibration.
* Throwout Bearing: While less likely to *directly* cause a vibration at driving speeds, a faulty throwout bearing could indirectly contribute by affecting clutch engagement smoothness. A noisy throwout bearing *might* indicate a problem.
* Pilot Bearing/Bushing: A worn or damaged pilot bearing (where the input shaft of the transmission sits) can cause vibration, especially at higher speeds.
2. Drivetrain Issues (Beyond the Clutch):
* Driveshaft: U-joints, balance, and overall condition should be checked. A worn or damaged U-joint will create vibrations that often feel most intense at specific speeds.
* Rear Axle: Worn bearings, unbalanced axles, or damaged differential components can transmit vibrations to the vehicle.
* Tires and Wheels: Unbalanced tires or bent rims are a frequent source of vibration. Check tire pressure as well – uneven pressure can also contribute.
* Wheel Bearings: Worn wheel bearings will create a vibration that might be mistaken for a drivetrain issue, particularly at higher speeds.
3. Engine Issues (Less Likely, But Possible):
* Engine Balance: Although unlikely directly related to the clutch job, check for any other recent engine work. Problems could be masked or exacerbated during the clutch replacement.
* Engine Mounts: Worn engine mounts can allow the engine to vibrate excessively, transferring the vibrations throughout the vehicle.
Troubleshooting Steps:
1. Visual Inspection: Carefully examine the installed clutch components for any obvious damage or misalignment.
2. Test Drive: Pay close attention to when the vibration occurs (speed, gear, etc.). This helps pinpoint the source.
3. Professional Inspection: If you're not comfortable working on your vehicle, a mechanic can diagnose the problem efficiently. They have the tools and expertise to inspect the drivetrain thoroughly.
Important Note: Ignoring a vibration can lead to further damage. Don't continue driving with a persistent vibration. The sooner you address it, the better.
