5 Symptoms of an Automatic Transmission That's Slipping

When the automatic transmission in your car is slipping, it can leave you stuck unexpectedly and even lead to a complete rebuild of the transmission. However, with some basic knowledge about the warning signs and symptoms of a slipping transmission, you can increase your chances of avoiding the expense of a new transmission.

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A vehicle’s transmission helps to control the pressure that the engine produces at different times. With automatic gear vehicles, the transmission functions to ensure the smooth transition between gears without the driver manually shifting the vehicle.

Even though transmission slippage is one of the more common problems with many vehicles, sometimes it becomes tricky trying to identify the cause before resolving the issue.

Table of Contents

Slipping Automatic Transmission Symptoms

Here are five of the most common signs of automatic transmission slip. As with many other issues, identifying the problem early on can save you hundreds or even thousands of dollars in repair or replacement costs.

#1 – Leaking Transmission Fluid

transmission fluid leaktransmission fluid leak

Most occurrences of transmission slipping take place when the car has low levels of fluids due to a transmission fluid leak. You can locate the leak in a few different places due to a punctured pan, damaged pan gaskets, burst lines, broken seals or even fissures in the torque converter.

If you insist on driving your vehicle and ignoring the leak, it could result in complete internal failure of the entire transmission system. Therefore, you need to take precautionary measures and seal the leak immediately.

In cases of a minor leak, as long as you monitor your transmission fluid level and top it off when needed, you may be able to postpone the repair for a bit.

#2 – Unusual Smells

burning smellburning smell

A burning smell from the engine or ever under your car means that either the transmission has overheated or its fluids have started leaking into the exhaust.

Transmission fluid has a huge responsibility when it comes to keeping the transmission system working effectively. Like engine oil, it constantly lubricates the system to prevent overheating.

Any leak may cause the fluid to drip onto extremely hot engine or exhaust components. The produced smell from the burning fluid is often an indication of your transmission slipping.

#3 – Check Engine Light

check engine lightcheck engine light

A check engine light warns a car owner of many things, including problems with the transmission. However, a combination of any other symptom here along with the constant warning from an illuminated “check engine light” should prompt you to have your transmission system diagnosed by a professional mechanic.

The mechanic will use a special diagnostic tool to decipher the actual cause(s) of the warning light to confirm whether the problem is transmission related or something entirely else.

#4 – Rough Shifts

incorrect transmission shiftingincorrect transmission shifting

As you drive your car, you might feel like it repeatedly refuses to change gears smoothly or normally, meaning that rough upshifts or downshifts are a common occurrence.

In certain occasions, you may hear or feel a sudden “thud” or “clunk” while shifting gears. If you eventually notice the car having difficulties to pick up speed, that is a clear indication of automatic transmission slipping.

#5 – Delayed Shifts

automatic transmission shiftingautomatic transmission shifting

Symptoms of delayed shift engagements means that your car takes a few more seconds before it actually engages into drive to accelerative forward. When shifting the vehicle from Park (P) to Drive (D), you will notice a long break in which the vehicle revs the engine while you press the gas pedal. It will not accelerate forward as usual.

The above symptoms often require the services of a qualified mechanic. Any need for transmission repair, such as replacing parts, should be done by a professional. You should also ask about the warranty of the parts, especially when the automatic transmission needs to be rebuilt.

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