Why wont car accelerate in 2nd or 3rd gear and also has burning smell?

If a car won't accelerate in 2nd or 3rd gear and has a burning smell, it could indicate a problem with the transmission, such as low fluid levels, a faulty torque converter, or slipping gears. The burning smell may be due to overheating components or burnt Transmission Fluid. It's essential to check the transmission fluid level and condition and have the vehicle inspected by a professional mechanic to diagnose and address the issue safely. Ignoring these symptoms can lead to more severe damage and costly repairs.