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I am new to the Ford Fusion group in terms of posting but I have used it for answers in the past. I am driving a 2011 Ford Fusion SEL. The vehicle has 103,000 miles on it. About 3 months ago I encountered stop and go traffic due to an accident on the interstate. After coming past the accident and upon accelerating the car started to vibrate / shudder / shake - whatever verb you want to use - it wasn't normal. To the extent my cell phone vibrated out of it's air vent holder. I was a mile away from an exit so I pulled off at that exit and turned off the vehicle. It should be noted when the issue started there were no dashboard lights, there was no RPM abnormalities etc. After turning the car off and waiting about 10 minutes the car started and drove normally. The issue didn't repeat for weeks and the car ran smoothly as normal. It repeated after the same thing - stop and go traffic and upon accelerating. I took the vehicle to my wonderful mechanic that has been doing all the servicing on it. At 100,000 miles Ford recommends spark plugs so they changed the spark plugs, checked the brakes, the tire balance, cleaned out some carbon deposits, and test drove the vehicle - it drove fine. Again - a couple of weeks of normal driving and then it did it slightly one further time. This time back at the mechanic who won't charge me till he knows that the problem is solved and this time they worked on the throttle body which he said was pretty dirty and did a fuel injection treatment and cleaning. Yesterday driving between 0 - 59 mph the vehicle was fine. At 60 it started shaking so I slowed up a bit. Back to 60 and the shaking started. I accelerated a bit more and at 70 on the interstate the shaking lasted for about 3 miles and then went away. Driving back home - about 30 miles - the car was fine and after that short period of vibration and shaking it was fine. My mechanic is a bit stumped and so am I. There are again no warning lights, the RPM seems normal, the vehicle shifts gears smoothly. Just trying to figure out what is going on and if someone in the forum has experienced the same thing. Any help other fusion owners can give is greatly appreciated. Many thanks !

2.5L – DRIVE TO REVERSE DELAYED ENGAGEMENT/SHUDDER Publication Date: September 21, 2016 FORD: 2016 Escape, Fusion ISSUE: Some 2016 Fusion and Escape vehicles equipped with 2.5L engine may experience a delayed engagement/shudder during a drive to reverse shift. This condition occurs when the throttle is applied during reverse engagement. ACTION: Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 102.02 or higher. Make sure you are connected to the internet when entering module programming to obtain the latest updates. Calibration files may also be obtained at www.motorcraftservice.com. NOTE: ADVISE THE CUSTOMER THAT THIS VEHICLE IS EQUIPPED WITH AN ADAPTIVE TRANSMISSION SHIFT STRATEGY WHICH ALLOWS THE VEHICLE’S COMPUTER TO LEARN THE TRANSMISSION’S UNIQUE PARAMETERS AND IMPROVE SHIFT QUALITY. WHEN THE ADAPTIVE STRATEGY IS RESET, THE COMPUTER WILL BEGIN A RE-LEARNING PROCESS. THIS RE-LEARNING PROCESS MAY RESULT IN FIRMER THAN NORMAL UPSHIFTS AND DOWNSHIFTS FOR SEVERAL DAYS. OPERATION DESCRIPTION TIME 160125A 2016 Fusion 2.5L: Reprogram The PCM (Do Not Use With Any Other Labor Operations) 0.4 Hr. 160125A 2016 Escape 2.5L: Reprogram The PCM (Do Not Use With Any Other Labor Operations) 0.4 Hr. WARRANTY STATUS Eligible Under Provisions Of New Vehicle Limited Warranty Coverage. Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. DEALER CODING BASIC PART NO. CONDITION CODE RECAL 04 ________________________________________ Module Reprogramming & Initialization Software necessary to program electronic modules to the latest calibration level, perform module initialization (PATS), and set Programmable Parameters on Ford, Lincoln and Mercury vehicles. Ford Module Programming (FMP) is a software application that allows subscribers to program electronic modules on Ford, Lincoln and Mercury vehicles. It can be used for: • Reprogramming emission-related (OBDII) modules on some vehicles manufactured in 1995 and all vehicles manufactured from 1996 to the present • Reprogramming or reconfiguring non-emission-related modules on many vehicles (UBP and MS-CAN not supported) In addition, module initialization (PATS) functions such as Keycode Erase/Reprogram and PCM Parameter Reset can be done using this application. J2534 Device using Ford Module Programming (FMP) can Reprogram and Configure most Modules. Latest Calibration Information Module Build Data (As-Built) Use VIN to obtain As-Built data www.motorcraftservice.com