307 transmission oil

Friends, I just changed the press pad. I have a question in my mind. It was as if I couldn't feel that relief in gear nights.

Transmission oil put 80 number service.

Also, they filled this oil machine with a little bit of 10 40 engine oil. We put 80 fat, brother, he said something. Do you think it is caused by oil? We already had 206 we had a little harder gears.