Technical Service Bulletin Engine Transmission Mounts

Subject:   Engine/Transmission Mounts   Models: 911/Turbo 1977→

Bulletin Number: 78 – 01

Engine Transmission Concave img

Installation of stop plates for engine/ transmission mounts on all 911 SC and Turbo vehicles produced from November 23, 1977 has been changed.

Stop plate is now installed with concave side facing mount.

Stop plates on older vehicles can be installed in new position to reduce transmission vibrations.


Return stop plates to old installation position if (rumbling) noise is present.

home page:

Want More?

Get the coolest tips and tricks today

Subscribe to our email list and get regular notifications of new videos and blog articles on how to repair your own car.