The race deteriorated on the input forward sprag and puts some score marks on the overrun hub. Outside of the 3-4 clutch pack being smoked, this was the worst damage I saw in my 4l60e after tearing it down. You can see the clutch material carnage on the sprag and hub. Should I replace the hub or can I put this back in as is? Buff the surface? The sprag is being replaced.

 

Some would . Personally I wouldn't they are dirt cheap even the heavy duty sonnax ones not expensive

 

I wouldn't use it. Too "cheap" of a part, and too much work/ expense to replace it if it messes up.

 

Would you risk the cake for some bad strawberries?

 

No I wouldnt

 

I picked up a new hub. I was curious as to the necessary surface quality of the hub. It was scuffed but no measurable amount material was removed.

 

I see this all the time with the bronze retainers, lack of lube here. If the surface has very little material missing. You could flat sand it. If you are using a sprag that has the bronze retainers. Drill four .125" holes in the retainer (90 degrees apart), that rides against the overrun hub, then chamfer the drilled holes. This should prevent this from happening again. Not necessary to do the other side.
The overrun hubs inner teeth that contact the inner race must be in reasonable shape (not pounded where they make contact). Too much play here, can possibly break the overrun hub.