TORQUE CONVERTER HUB QUESTION for the experts

[PaulRV6]

I lost all my trans fluid and when I removed the converter from the trans I noticed the seal was okay but the hub surface that the seal rides on was all scored and worn. This is a very low mileage KB converter, what went wrong? What caused the hub OD to get so worn at the sealing surface?

Did I blow the converter or the pump? If I look inside the converter there is a metal ring that rotates separately from the inside splines, is this normal?

Is the converter trash or can it be rebuilt? It probably only had less than 1000 easy miles on it.

Please let me know your thoughts.

paul

 

[PaulRV6]

KNOW WHAT HAPPENED?

Well I just realized after looking at the converter hub or stator shaft that it is cracked from one of the drive notches down to the weld on the cover. It goes down thru where the seal rides. The
3" long hub just split apart.
What could have caused this?
Does this mean the tranny is still okay or did something in the tranny cause it.
Need your help please.

paul

 

[PaulRV6]

Any of you folks have some suggestions on where to look or what to check?
This can't be the first time this has happened. Thank you

paul

 

[WE4]

Well....................

If you ask a tranny guy, they will say that the hub was no good.
If you ask a converter guy, they will tell you it is harmonics. I tend to lean towards the converter side. The cure is better material. But, it still takes place. Harmonics are caused at high speed and I am not even going to go there with my limited understanding of this theory, as well as most on here, even though I believe in it,
(With the exception of Chris of course )
Maybe he can shed some light too.
Harmonics are similiar to a very high speed , high frequency vibration. The converters we sell and Chris sells all have a hub made from premium materials. But I have still seen it happen. The best method for a cure is build a pump with the best rotor and slide material you can find and use a converter of high quality.
But even this has a failure from time to time. Stock D5's can crack at just about anytime with the material used by GM.

Hope this kinda sheds some light.
Bruce
WE4