7 Signs Your Transmission Is Failing (and What to Do Next)

Automatic transmissions usually give warnings before they quit completely. Catching the signs early can save you a tow and helps you plan the repair.

Common warning signs

• Slipping: the engine revs up but the vehicle does not speed up as it should
• Delayed engagement: a pause or clunk when shifting into Drive or Reverse
• Harsh or late shifts, or the transmission stuck in one gear (often called limp mode)
• A burning smell, which can mean overheated fluid
• Red fluid leaking under the vehicle
• Grinding, whining or humming noises that change with speed
• The check engine light, often with transmission-related trouble codes

What to do

• Check the fluid level and condition if your vehicle has a dipstick: dark, burnt-smelling fluid is a bad sign
• Have the trouble codes read; a scan is often free at parts stores
• Get a diagnosis from a transmission shop before buying parts. Some problems are a sensor, solenoid or wiring issue, not the whole transmission

When a used transmission makes sense

If the shop confirms internal failure, replacing the unit with a low-mileage used OEM transmission is often far cheaper than a rebuild, especially on common vehicles. Send us your VIN and we will quote a matched unit with the mileage in writing, free shipping and a 3-year parts warranty.