Engine revs rise but vehicle speed does not increase accordingly
RPMs flare between gear shifts
Delayed engagement when shifting into drive or reverse
Slipping or jerking during acceleration
Trouble maintaining speed on hills
Burning smell from transmission fluid
Transmission fluid appears dark, dirty, or low
Check engine or transmission warning light is on
Hesitation before the transmission catches
Unusual whining, buzzing, or humming sounds
Gears change unexpectedly or too early
Poor acceleration despite pressing the gas pedal
Vehicle feels like it is struggling to stay in gear
Shuddering or shaking during shifts