What is this Front drive shaft noise

[snow junky]

I had a local driveshaft shop make this a driveshaft.
they called the spline a tractor / monster spline. all the U joints are new and have no play and are not hitting each other

It starts ringing after about 25mph and will stay till I slow down to about 10mph (only while coasting)

Makes no noise in 4wd with driveshaft removed

https://vimeo.com/115607254
I was thinking it was the splines ringing so
I tried plug welding the driveshaft spline collar to tube. Not sure if if helped.

 

[snow junky]

Anyone have an idea?

 

[Andy in Pa]

I would try greasing it, but typically the slip built into tractor splines are too loose for high speed/on road applications. I have seen them used in dedicated off road rigs with no issues though.

 

[snow junky]

Yea filling the thing up with grease helps but it's still loud as hell

 

[nevada]

Yea filling the thing up with grease helps but it's still loud as hell

i wonder if you could wrap something around the outside and knock the sound down a bit. maybe some tape, or rubber strap. although, depending on what environment you use it in, it may not last very long.

 

[snow junky]

i wonder if you could wrap something around the outside and knock the sound down a bit. maybe some tape, or rubber strap. although, depending on what environment you use it in, it may not last very long.

yea was thinking the same thing, nothing would really last tho. was thinking about some kind of thin sleeve between the splines, idk it still seems like its unreasonably loud, even if its for a tractor. i cant really go over 20mph

 

[snow junky]

Talked to another driveshaft shop and they said it was Norman and called it gear rattle from the tractor spline