PSA: my uncle's "never trust a mechanic who smiles" rule just cost me $340
My uncle has been giving me car advice since I got my first beater in 2016, and his number one rule was always "if a mechanic smiles and shakes your hand, he's about to rob you." So when my Civic started making a grinding noise going into second gear, I skipped the shop near my place in Sacramento that had great reviews and a friendly owner. I took it to a grumpy guy in a dirty garage instead because I figured he was honest. He charged me $340 for a "transmission flush" and the noise was still there driving home. Two months later the friendly shop looked at it for free and said it was just a worn clutch cable, which cost $55 to swap. My uncle still swears he's correct and that the friendly guy was just "saving the big scam for later." What's the worst piece of passed down "wisdom" you got from family that you actually followed?