I broke up a gearbox today

Since I've always heard too many assumptions about the gear damage lately...I decided to do nails with heads.
Since I often overtake gears and solve other difficult problems
I'll explain to you on the basis of the following pictures what is the main cause of the transmission defect, at least 80%.I hope not to overload the server and convince the unbelieving.

Gear failure resulting from never-changed OIL, 245 TKM mileage and defective of the freewheel brake due to burnt brake lamellas because no oil change was made.

Follow-up damage: Bemslamelle housing freewheel broken, 1 and 3 gear slats damage, friction discs annealed and housing damage clutch package...

see yourself

And please don't put any texts in between...

Would anything for the FAQ??...