4L60E 3-4 odd clutch wear

[badnews]

Howdy all! New to the forum. Hope ya'll are doing well and runnin' on all cylinders... Got myself into something I really wasn't ever looking to do, a 4l60e rebuild. Upon disassembly of a somewhat recently rebuilt 1999 4l60e, I came across worn engagement cogs on the 3-4 fiber plates. Everything else appears to be in pretty good shape. Any ideas on what would cause this kind of wear? See pics. Gracias!

 

[Supercharged111]

Holy crap. How's the drum look?

 

[Hipster]

is there a hard hitting shift kit in this trans?

 

[badnews]

Holy crap. How's the drum look?

It comes in contact with the input internal gear, which is steel. Even though you can see wear signs, there aren't any edges to it. Just shiney.

 

[badnews]

is there a hard hitting shift kit in this trans?

I'm suspecting hard shift, too. Is a donor out of 1999 Astro, so most likely no shift kit. Haven't gone through valve body, yet. Haven't experienced this transmission in action, yet. Came out of dead Astro. Was said to have been rebuilt, but you know how that goes....

 

[tayto]

what is your line pressure?

 

[badnews]

what is your line pressure?

I've not installed this transmission yet. Going through it first.