HELLO,
I RECENTLY HAD THE MAIN OIL SEAL CHANGED ON MY 2006 FORD F150 BECAUSE THERE WAS A SMALL LEAK BETWEEN THE MOTOR AND TRANSMISSION. I ALSO HAD ALL THE SEALS ON THE MOTOR AND TRANSMISSION CHANGED AT THE TIME. I AM NOW HAVING ISSUES WITH THE TRUCK THAT IT SHAKES VIOLENTLY WHEN I TURN ON THE TRUCK, IT STOPS SHAKING IF I ACCELERATE BUT ONCE I STOP IT STARTS TO SHAKE AGAIN. ALSO IF I PUSH PAST AROUND 40MPH THE CAR STALLS AND SEEMS TO WANT TO TURN OFF. I HAVE CHANGED THE SPARK PLUGS AND THE SPARK PLUG WIRES, AND CHECKED THE TRANSMISSION FLUID BUT SO FAR NO LUCK. I HAVE TRIED TO SCAN THE TRUCK FOR CODES BUT THE SCANER SHOWS NO CODES. ANY IDEAS AS TO WHAT COULD BE WRONG? THANKS

 

WELCOME TO FTE

IS THE VIBRATION IN THE STEERING WHEEL OR MORE LOCATED IN THE SEAT AREA? ONE FACTOR TO CONSIDER IS WHETHER THE MECHANICS DISCONNECTED THE DRIVESHAFT TO PERFORM THE REPAIRS, IT'S POSSIBLE THAT IT IS NO LONGER IN PHASE OR BALANCE.

 

Thanks!
The shaking is both in the steering wheel and the seats. It still vibrates when accelerating but a lot less than when idling. Would the driveshaft also affect the issue relating to pushing past 40 mph the truck seems to want to shut off?

 

I'd take it back to whoever did the work?

 

I question if they got the torque converter / flywheel bolts back together and aligned right when they pulled the transmission... I agree, tell the mechanic to test drive.... and ask about the flywheel area as a potential problem.