4 Common Indications of Contaminated Transmission Fluid

Rowlett Transmission • 30 November 2025

Your vehicle’s transmission relies on clean, high-quality fluid to operate smoothly and prevent internal damage. Over time, transmission fluid can become contaminated with metal shavings, dirt, and burnt particles. When this happens, the transmission can lose its ability to shift properly and may suffer premature wear. Recognizing the early signs of contaminated fluid can help you avoid costly repairs. At Rowlett Transmission, we can expertly address issues related to transmission fluid. Here are four common warning signs that your transmission fluid is contaminated.


Dark, Dirty, or Cloudy Transmission Fluid
Healthy transmission fluid is usually bright red or pink. When the fluid becomes contaminated, it often turns dark brown, black, or cloudy. These color changes indicate the presence of dirt or other debris. 


A Strong Burning Smell
A burnt odor coming from your vehicle is a major red flag. Contaminated or degraded transmission fluid loses its ability to lubricate properly, causing excessive friction and heat inside the transmission. This heat can produce a noticeable burning smell that should never be ignored. Continuing to drive with burnt or degraded fluid can lead to severe damage, making it essential to have the system inspected and flushed as soon as possible.


Rough or Delayed Shifting
If your vehicle hesitates before shifting gears or the gear changes feel jerky, contaminated transmission fluid may be the cause. Contamination can prevent the fluid from flowing smoothly through the transmission. This leads to sluggish, inconsistent shifting. 


Unusual Noises From the Transmission
When debris circulates through the system, it can reduce lubrication. This could result in metal-on-metal contact that produces troubling sounds. If you hear any new or unusual noises while accelerating, shifting, or idling, it’s important to have your transmission checked as soon as possible.


Transmission Service in Rowlett, TX

For expert transmission service in Rowlett, TX and the surrounding area, contact Rowlett Transmission at (972) 284-0781. At our local transmission shop, we’ll make sure that your vehicle is capable of shifting smoothly and safely. Feel free to give us a call to make an appointment!