The FFS thread…

[TOBASH]

I’m purchasing new 1/2 shafts and rotors.

 

[Mogman]

I’m purchasing new 1/2 shafts and rotors.

Good deal!
Just so it will be here this is what a 10K/12K A1/A2 half shaft should look like, I believe you have a half shaft from a late ECV of REV truck.

 

[Mogman]

He is awesome.
Bottom line, the 10” rotor should fit tight. It is loose. It is wrong.

Axle is correct BUT rotor is wrong and went out of balance as it is not tight

I am sorry, I miss understood, I guess you meant to say the drive flange was OK, to me axle=half shaft

 

[Mogman]

At least now you have it figured out and have the resources to fix it
What kind of symptoms did you have? I would think this would cause a high speed vibration

 

[TOBASH]

At least now you have it figured out and have the resources to fix it
What kind of symptoms did you have? I would think this would cause a high speed vibration

I developed a progressive wobble that became a rhythmic bumping that became a serious loud and uncomfortable thumping.

Afterwards I noticed a leaking inner boot.

The problem seems to be wrong slotted rotor with too large inner diameter.