02' S-CREW VIBRATION/NOISE PROBLEM
I RECENTLY PURCHASED A 2002 FORD F-150 S-CREW WITH THE 4.6 AND 3.55 L.S. DIFF. I AM EXPERIENCING A VIBRATION/NOISE THAT SEEMS TO BE COMING FROM THE REAR OF THE TRUCK. IT ONLY HAPPENS FROM 52-60MPH. THE DEALER HAS REPLACED THE DRIVESHAFT (TWICE) AND THE RING AND PINION ALSO. THE AXLE SHAFTS WERE CHECKED FOR RUNOUT AND THE RIMS AND TIRES WERE SWAPPED OUT.
THE VIBRATION ONLY OCCURS UNDER A LOAD NOT WHILE COASTING.IT IS VERY NOTICEABLE WHEN CLIMBING A GRADE.
THIS TRUCK HAD ONLY 500 MILES ON IT WHEN I BROUGHT IT BACK TO FORD.
THE PROBLEM STILL EXISTS TODAY. DOES ANYONE OUT THERE HAVE A SIMILAR PROBLEM?
DROP ME A LINE IF YOU HAVE ANY IDEAS
THANKS
THE VIBRATION ONLY OCCURS UNDER A LOAD NOT WHILE COASTING.IT IS VERY NOTICEABLE WHEN CLIMBING A GRADE.
THIS TRUCK HAD ONLY 500 MILES ON IT WHEN I BROUGHT IT BACK TO FORD.
THE PROBLEM STILL EXISTS TODAY. DOES ANYONE OUT THERE HAVE A SIMILAR PROBLEM?
DROP ME A LINE IF YOU HAVE ANY IDEAS
THANKS
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Comments
Have the dealer do a load test on the torque converter.
After I lowered our truck 2 inches all around , I had to shim the differential to correct the pinion angle. THe vibration was quite bad before I shimmed the diff.
Normally a vibration under power the pinion yoke angle is too high. If the vibration is on deceleration the angle is low.
Your trouble may not be the angle of the drive shaft. Just some random thoughts of mine.
If I am on the throttle hard(3/4 or WOT) the vibration is very noticable.
My Ford truck is a 5.4 , 4x2 unit.
FWIW , I also own a 2000 1500 Silverado 4x2. If I get a heavy load or trailer on it the truck vibrates your teeth out in first gear. The dealer's answer was "add air bags".
The real problem with the chev is when a heavy load is added.... from the center support bearing of the drive shaft to the diff the drive shaft is actually pointing up. This puts a real bad angle on the u joint. When power is added the diff nose moves up and makes the angle even worse.