2006 Saturn Ion iis grinding gears in 3rd and 4th and can't use either gear now

He should have been very clear before doing the clutch job if he knew the synchronizers were gone. No point in doing the clutch if it has to come all apart again. The oil part is unknown. He may have drained some but who knows. Top it up and keep an eye on it. Alex

As for the sychros being shot it depends on how bad the clutch was to start. I have done clutches where the car was undriveable before job so there would not have been any way to test drive and test the operation of the transmission before hand. On the other hand if it was at all driveable I would have test driven it at least a short distance if possible to test overall operation. Without knowing the whole situation it is possible the tech had no easy way of knowing of the problem. As for your other concerns, I always check all fluids on major jobs before they go out, but they may have other procedures so hard to tell. Same thing on the CEL if it was on when the vehicle came in I would note it, if came on after job but before I released the vehicle to the owner I would at least do preliminary check to ensure not related to work done. If came on after releasing vehicle I would offer to diagnose and waive the fees if in any way related to work just done, for example, a loose connection related to removal of trans. If not then charge diagnostic fee and leave it up to customer if wanted to repair or not. Sometimes these lights are just coincidental to repair, or something else was borderline and now driving normally the computer can run other tests and see things it doesn't like now. Clint