I have heard that the extreme version of the eccentric bushing can cause front axle vibration depending where its set due to throwing the center line of the differentials internal half shafts off center. Another words not a good idea to go beyond a certain point as per the sought after increase in caster which these Fords seem to need to prevent high speed steering wobble. So attempting to do one thing to correct the caster angle by that method and causing another issue instead. Having said that it would not be noticed until using four wheel drive at higher speeds when the internal shafts of the front diff are spinning faster showing up their misalignment. Hopefully how I am explaining it makes sense to you ?.
I've never had that problem on any of my trucks but that would make sense if the stub shaft at the bearing was off angle and you're running at high speeds. Front differentials on these trucks tend to be noisy and honestly the axles kind of irritating but it's a simple system that's very durable.
@@All7.3FordTrucks I think you see what I mean though, its an "invisible" centerline that the axle stubs are meant to turn within rather than if the outer end of the drive axle gets too far out of center, that would put a side force on the splines and side gears within the differential carrier. So its straight line driving at that point which could cause a vibration. One of my nephews who does happen to be a heavy duty mechanic but was working in a different capacity for some years for a local Cat dealer, his company pickup was a F250 and he had it from new and oh gees did he have problems with high speed wobble with that truck, Ford would pretend everything was fine and throw a new steering shock on it and did that a few times, but also the front axle hub bearings were failing twice. If you can imagine the hub bearings being replaced at 30000 miles and then again at 60000 miles. Ford knew his truck was having high speed wobble issues, more than half the fleet of pickups that Cat dealer had was having high speed wobble issues and Ford just sloughs it off, that did not encourage me to buy a Super Duty after his Ford experience I must say. Of course all the big three heavy duty pickups seem to have one issue or another in later years, pretty sad.
I have heard that the extreme version of the eccentric bushing can cause front axle vibration depending where its set due to throwing the center line of the differentials internal half shafts off center. Another words not a good idea to go beyond a certain point as per the sought after increase in caster which these Fords seem to need to prevent high speed steering wobble. So attempting to do one thing to correct the caster angle by that method and causing another issue instead. Having said that it would not be noticed until using four wheel drive at higher speeds when the internal shafts of the front diff are spinning faster showing up their misalignment. Hopefully how I am explaining it makes sense to you ?.
I've never had that problem on any of my trucks but that would make sense if the stub shaft at the bearing was off angle and you're running at high speeds. Front differentials on these trucks tend to be noisy and honestly the axles kind of irritating but it's a simple system that's very durable.
@@All7.3FordTrucks I think you see what I mean though, its an "invisible" centerline that the axle stubs are meant to turn within rather than if the outer end of the drive axle gets too far out of center, that would put a side force on the splines and side gears within the differential carrier. So its straight line driving at that point which could cause a vibration.
One of my nephews who does happen to be a heavy duty mechanic but was working in a different capacity for some years for a local Cat dealer, his company pickup was a F250 and he had it from new and oh gees did he have problems with high speed wobble with that truck, Ford would pretend everything was fine and throw a new steering shock on it and did that a few times, but also the front axle hub bearings were failing twice. If you can imagine the hub bearings being replaced at 30000 miles and then again at 60000 miles. Ford knew his truck was having high speed wobble issues, more than half the fleet of pickups that Cat dealer had was having high speed wobble issues and Ford just sloughs it off, that did not encourage me to buy a Super Duty after his Ford experience I must say. Of course all the big three heavy duty pickups seem to have one issue or another in later years, pretty sad.