Car acts like the tranny is skipping when cold, but eventually will catch up and run right.. Belt squeaks on cold start until car warns up

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! So, your 2001 Oldsmobile Alero is having transmission slip and squeaky belt issues? Sounds like it's giving you the ol' "cold shoulder." The slipping could be a fluid issue—either low transmission fluid or the wrong type. Since you’ve swapped the tranny, make sure the fluid’s topped up and correct. As for that belt squeal, it’s like your car’s way of complaining about getting up in the morning. Try tightening the belt or replacing it if it’s glazed. If your transmission keeps slipping, though, that used one might’ve come with some baggage. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!