I recently made 5k due to a customers unwillingness to be honest, I shall explain.
So we get a call from some college kid who says his car is looting smoke out of the exhaust and wants to know what's wrong. I tell him I won't diagnose over the phone but he can have it towed over. As it arrives the tow truck driver starts the car to move it and it just completely plots smoke from the exhaust. I call the owner and try to get him to tell me the events leading up to the issue and be swears be did nothing to the car, it just has no power and smokes like a chimney. We went round and round and he finally convinced me. He then tells me he needs a car and h doesn't have much money. He explains he has another car that just needs miner work so I offer to trade him the "blown up" car for labor to help him out. We often keep a car around to fill with scrap as I'm sure most of you do.
Anyway, we fix his other car and something just kept bugging me about his story so I pull the car into the shop after work to just take a look. I pull the dipstick and find it is 3-4 quarts over filled so I drained the oil and got it to its proper level. Remember how he said it also lost power?, well guess what, the tranny was 3-4 quarts low...
So here's what I believe happened; genius 1 and 2 decided they were going to change their own oil to save a buck and drained the oil which was actually the trans fluid, after that they refilled the oil which was actually the oil and there you go... If they would've told me the truth it would have been a cheap fix for them. Instead, they lied and lied and I sold the car for 5k with having almost nothin invested.