F-150 Transmission Shutter - Fixed - Coil on Plug and Spark Plug Swap, Do you have a shutter around 45-50 MPH in your f-150, explorer, expedition, lincoln navigator or other Ford with a 5.4L or 4.6L triton engine? It may not be your torque converter or your transmission. It might be your coil pack (coil on plug) and your spark plugs. My truck did NOT set an engine code when it shuttered or shook. Simply accelerating after the overdrive gear locked out would cause the shutter to stop. A new Accel super coil pack and motor craft spark plugs fixed the problem 100%. It cost under $300 to do it myself (including the cost of removing / extracting all the broken spark plugs.)
Other videos associated with this repair:
Removing broken spark plugs: http://youtu.be/dOG1zSnPJRo
Removing a socket from a cylinder head: http://youtu.be/pb1PB9Nxe58.
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| F-150 Transmission Shutter - Fixed - Coil on Plug and Spark Plug Swap |
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