Truck at dealership for thunk/shutter under accel... Torque converter?
Member
Joined: Jan 2006
Posts: 24
Likes: 0
From: Washington State
Originally Posted by DarkStoneScrew
What reflash are you referring to?
2005 F-150, 2006 MARK LT:
HARSH 3-2 DOWNSHIFT BETWEEN 17-25 MPH (27-40 KM/H) - NO DTC"S - 4R75E AUTOMATIC TRANSMISSION - VEHICLES BUILT BEFORE 4/20/2005
SOME 2005 F-150 AND 2006 MARK L T VEHICLES BUILT BEFORE 4/20/2005, EQUIPPED WITH THE 5.4L ENGINE AND 4R75E AUTOMATIC TRANSMISSION, MAY EXHIBIT A HARSH 3-2 . DOWNSHIFT BETWEEN 17-25 MPH (27-40 KM/H) WITH NO DIAGNOSTIC TROUBLE CODE (DTC), AND A DRIVELINE CLUNK BETWEEN 40-50 MPH (64-80 KM/H).
REPROGRAM THE POWERTRAIN CONTROL MODULE (PCM) TO THE LATEST CALIBRATION USING WDS RELEASE B37.4 OR HIGHER. CALIBRATION FILES MAY ALSO BE OBTAINED AT WWW.MOTORCRAFT.COM.
See TSB for complete details
EFFECTIVE DATE: 05/13/2005
------------
I had this done and it has made quite a difference with stock throttle response and the "shift clunk." That doesn't mean I still don't want an XCal2 though!