There are TSBs (Technical Service Bulletins) for the Shudder, vibration, metallic noise at low speeds, and Bump symptoms on some 2009-2010 F-150. They all seem to tie back to the Torque convertor.
21470 SOME 2010 F-150 VEHICLES EQUIPPED WITH THE 6R80 TRANSMISSION MAY EXHIBIT BUMP ON LOW SPEED 2-1 COASTING DOWNSHIFT
EFFECTIVE DATE: 08/23/2010
TECHNICAL SERVICE BULLETINS
10-06.06
2010 F150 4SL AND 6R80 TRANSMISSION -TORQUE CONVERTER SHUDDER - 30-35 MPH (48-56 KMII) BUILT BETWEEN 6/1/2009 AND 11/1/2009
SOME F-150 VEHICLES EQUIPPED WITH A 46L ENGINE, 6R
TRANSMISSION AND BUILT BETWEEN 6/1/2009 AND 11/1/2009 MAY EXHIBIT A SHUDDER WHICH IS FELT DURING LOW SPEED LIGHT THROTTLE ACCELERATION BETWEEN 30-35 MPH (48-56 KM/H), THE SHUDDER/VIBRATION EVENT OCCURS TYPICALLY WHEN THE VECHICLE DOWNSHIFTS AND THEN IS FOLLOWED BY A LIGHT THROTTLE TIP-IN. See TSB for complete details Effective date 4/01/2010
TECHNICAL SERVICE BULLETINS
10-06-06
2010 F-150 4.6L AND 6R80 TRANSMISSION -TORQUE CONVERTER SHUDDER - 30-38 MPH (48-58 KMII* - BUILT BETWEEN 06/01/2009 AND 11/1/2009
SOME F-150 VEHICLES EQUIPPED WITH A 4.6L ENGINE, 6R80 TRANSMISSION AND BUILT BETWEEN 6/1/2009 AND 11/1/2009 MAY EXHIBIT A SHUDDER WHICH IS FELT DURING LOW SPEED LIGHT THROTTLE ACCELERATION BETWEEN 30-35 MPH 48-56 KM/H, THE SHUDDER/VIBRATION EVENT OCCURS TYPICALLY WHEN THE VEHICLE DOWNSHIFTS AND THEN IS FOLLOWED BY A LIGHT THROTTLE TIP-IN, See TSB FOR, complete details EFFECTIVE DATE: 04/01/2010
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