Ogden Dan
Well-Known Member
My truck has been plagued with both the start-up shudder as well as a high speed vibration. For those that have been following my previous posts, I have an update.
Previously, I had been to the dealer 4 times in an attempt to eliminate the shudder and high speed vibration. It got to the point that I told them the high speed vib is a priority as that occurs all the time when I am at a specific speed (usually 50-55 and 70-75) which happens to be the speed normally driven.
I had the TSB performed (they attempted multiple angle settings after the recommended angle yielded no improvement) and it did nothing to improve the start-up shudder. The high speed vibration always remained and never really improved.
The dealer seemed clueless regarding both the shudder AND high speed vibration issue, so I again contacted customer service. Their only solution was to "bring it to another dealer".
I reluctantly did so as I was running out of options. The 2nd dealer attempted the TSB fix as well and, just as the first, it resulted in no improvement in start-up shudder. HOWEVER, they decided to then focus on the high speed vibration. They did found a couple of things: 1) The right rear tire was found to require excessive weight while performing a road force balance (this was despite the fact I had the wheels road force balanced 2 times at an independent tire dealer and 2 additional times at the previous Ford dealer). They replaced the tire and then found the rim to be bad. They ended up replacing both the tire and wheel. 2) The driveshaft was found to exhibit excessive runout at the carrier bearing (they said the spec is 1mm and mine has 3mm). The driveshaft has been on backorder now for over three weeks.
I decided to pick up the truck and will wait out the driveshaft replacement. The new wheel/tire alone eliminated most of the vibration. We will see how well the driveshaft replacement ends up correcting the remainder of the vibration (which is now slight). Perhaps this will improve the start-up shudder as well as the 2 previous attempts performing the TSB did not help. I'm wondering if there is an issue with the driveshafts as this back order seems quite lengthy for a fairly common item.
Dan
Previously, I had been to the dealer 4 times in an attempt to eliminate the shudder and high speed vibration. It got to the point that I told them the high speed vib is a priority as that occurs all the time when I am at a specific speed (usually 50-55 and 70-75) which happens to be the speed normally driven.
I had the TSB performed (they attempted multiple angle settings after the recommended angle yielded no improvement) and it did nothing to improve the start-up shudder. The high speed vibration always remained and never really improved.
The dealer seemed clueless regarding both the shudder AND high speed vibration issue, so I again contacted customer service. Their only solution was to "bring it to another dealer".
I reluctantly did so as I was running out of options. The 2nd dealer attempted the TSB fix as well and, just as the first, it resulted in no improvement in start-up shudder. HOWEVER, they decided to then focus on the high speed vibration. They did found a couple of things: 1) The right rear tire was found to require excessive weight while performing a road force balance (this was despite the fact I had the wheels road force balanced 2 times at an independent tire dealer and 2 additional times at the previous Ford dealer). They replaced the tire and then found the rim to be bad. They ended up replacing both the tire and wheel. 2) The driveshaft was found to exhibit excessive runout at the carrier bearing (they said the spec is 1mm and mine has 3mm). The driveshaft has been on backorder now for over three weeks.
I decided to pick up the truck and will wait out the driveshaft replacement. The new wheel/tire alone eliminated most of the vibration. We will see how well the driveshaft replacement ends up correcting the remainder of the vibration (which is now slight). Perhaps this will improve the start-up shudder as well as the 2 previous attempts performing the TSB did not help. I'm wondering if there is an issue with the driveshafts as this back order seems quite lengthy for a fairly common item.
Dan
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