the no. 25 is the manual valve lever, it connects to your shifter stick in the car. I dont think I have come across any car in which that part wore out.

to remove that part, the manual valve is released from the transmission valve body first.

If your transmission has a PLIL then that item has a higher chance of being the leak. you might need to add some flourscent dye to see the leak.

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)