2014 F350 Vibration
We bought a 2014 F350, my dealer told me I needed to drive my new truck 1,000 miles before I towed with it. Yesterday I hit the mark and today I hooked up the trailer for a test drive. All was great, ...
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Well maybe Dana just makes junk then, my truck had it also towing our 9800# TT and the CB and u-joints were junk at 48K and again at 92K. Called several drive train experts and was told it is the nature of split drive shafts.
So how many miles were towing, as the issue does not show up until the drive shaft angle changes. How it was explained to me is under heavy load or hard acceleration the drive shift will twist out of center line causing the shudder. Once it hits a high enough RPM it will snap back in line. However the vibration will (their words) weaken the CB causing it to start splitting. The square style bearings are the ones that suffer the most. They now have (don't know when they first came out) round carrier bearings that resist splitting. The u-joints are effected by the same off center line rotation.
I was told you can lesson the effects by adding shim to the C/B or changing the pinon angle. This will change the D/S angle to prevent vibrations and premature bearing and U-Joint wear.
But hell maybe they were just trying to sell me something!
Don
So how many miles were towing, as the issue does not show up until the drive shaft angle changes. How it was explained to me is under heavy load or hard acceleration the drive shift will twist out of center line causing the shudder. Once it hits a high enough RPM it will snap back in line. However the vibration will (their words) weaken the CB causing it to start splitting. The square style bearings are the ones that suffer the most. They now have (don't know when they first came out) round carrier bearings that resist splitting. The u-joints are effected by the same off center line rotation.
I was told you can lesson the effects by adding shim to the C/B or changing the pinon angle. This will change the D/S angle to prevent vibrations and premature bearing and U-Joint wear.
But hell maybe they were just trying to sell me something!
Don
