Vibrations in driveline as a result of aftermarket springs.

[XwerX]

Nice, glad you got to the bottom of it. Was the pinion seal leaking?

The pinion seal is not leaking much. The seal on the transfer case is.

 

[XwerX]

Got the truck back today. The vibration is gone.

 

[FmaxTurboSi]

Got the truck back today. The vibration is gone.View attachment 434988

how bad was the vibration? was it always at a certain speed? could you explain how it felt a little more in detail please.

 

[XwerX]

how bad was the vibration? was it always at a certain speed? could you explain how it felt a little more in detail please.

Initially I felt the vibrations start at 60-65 mph, this was around 5,000 miles on the truck. When the issue was finally diagnosed the vibrations would start around 45 mph. It felt like very small rumble strips on the road. Most people would not be able to notice the vibrations. These vibrations were felt in the pedals and steering wheel.