Planetary damage - thoughts on cause

[WV64Signet]

1964 Torqueflite 904

Pushbutton

2464979U. 1331125

Tear down after no upshift. Low and Reverse fine

Thoughts on how this damage could occur?

(Yellow and red highlights applied)

Thanks for the insights FABO

 

[Murray]

I would guess that thrust washers were not installed correctly causing components to beat themselves to death.

 

[Demonracer]

^^^^^ times 2.