Quieting Lincoln Navigator Buzz

July 5, 2023
Some 2013-2014 Lincoln Navigator vehicles may exhibit a growl or buzz noise coming from the transmission that occurs when shifting from park to drive or park to reverse, most often after the vehicle has been parked and re-started.

Some 2013-2014 Lincoln Navigator vehicles may exhibit a growl or buzz noise coming from the transmission that occurs when shifting from park to drive or park to reverse, most often after the vehicle has been parked and re-started. Identify the transmission build date on the transmission identification tag.

The date will be in DDMMYY (day, month, year) format. Replace the main control valve body separator plate or main control assembly as required by the transmission build date, as follows:

P/N PART

CL3Z-7Z490-C............Main control valve body separator plate (built between 8-1-2013 – 2-28-2014)

FL3Z-7A100-E............Main control assembly (built between 3-1-2014 to 3-15-2014)

FL3Z-7Z490-E............Main control valve body separator plate (built between 3-16-1024 to 7-14-2014)

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Sponsored Recommendations

Variable Valve Timing (VVT) Training Series

Almost every new vehicle is equipped with VVT technology. This video explains the weak points in OE designs and gives you a complete overview of the replacement options available...

Cam & Crank Sensor Training Series

Today's advanced engines depend on accurate and consistent information from cam and crank sensors for performance, fuel economy and emissions, and not all cam and crank sensors...

Buying Your Next Diagnostic Tablet

When you last invested in a diagnostic tablet for your shop, did you consider it a potential gateway to increased revenue? Probably not. It’s likely you viewed it as a necessary...

Access Carside OEM Repair Data with MOTOR TruSpeed

Now available on all Autel MaxiSYS Ultra Series tools, MOTOR TruSpeed Repair delivers expanded OEM service and repair data within days of being published by

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!