If the new flex disc is not installed correctly, it can cause noise, vibration, and premature failure.

http://www.peachparts.com/shopforum/tech-help/235575-flex-disc-orientation-safety-durability-issue.html


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__________________
ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D

https://www.boldegoist.com/