Last year I went to the dealership to get the engine computer replaced on a recall.
I opted to have them do it while I wait. It shouldn’t take long to unplug a little box and plug in another.
Plus, I wanted to be there in case there were any issues.
I was there about 2 hours because the first replacement wouldn’t work.
While I was waiting several people came and picked up cars. Nobody (except me) was getting out of there for less than $300.
While I’m waiting the service writer informs me that my transmission oil is dirty.
I point out I changed it 2000 miles earlier.
“How did you change it?” “I drained and refilled it.” "It needs to be flushed."
I ask in a slightly elevated voice “how do you flush a manual transmission?”
“Um… they power flush it.” “No thanks” “Your power steering fluid is very dirty too” "Okay"
Now, I’ve always drained and refilled the PS reservoir once a year and the car had just 23k miles.