4 Top Causes for Leaking Transmission Fluid

July 2, 2025

4 Top Causes for Leaking Transmission Fluid

Red Car - Transmission Repair

Transmission fluid lubricates and cools the transmission components. Without transmission fluid, the transmission will not function and low transmission fluid can lead to transmission failure if it goes unresolved. Dirty transmission fluid and low transmission fluid can affect the operation of transmission system. Low transmission fluid means that the fluid is leaking. But what causes transmission fluid to leak?


Top Causes for Leaking Transmission Fluid


1.      Transmission Seal

Transmissions are designed with several seals through the system. When one of these seals are worn, damaged, or loose it could result in leaking transmission fluid. It is a simple part to replace in the transmission. Although just like any transmission part, it is crucial for the proper function of the entire transmission.


2.      Transmission Pan

A transmission pan holds the transmission fluid within the transmission, but sometimes the pan gasket or pan drain plug can become worn or damaged. A transmission pan is a simple repair, though it definitely needs to be addressed promptly to prevent major damage to the transmission. Loose or damaged parts to the transmission pan can commonly cause the transmission fluid to leak.


3.      Transmission Fluid Line

Transmission fluid lines are usually made of aluminum or high-grade steel. Though like many things, it can become worn or degraded. Any puncture, crack, damage, or loose connection point can result in leaking transmission fluid.


4.      Torque Converter Problem

Automatic transmissions rely on the torque converter. The torque converter controls the flow of transmission fluid throughout the whole transmission. Torque converters are responsible for automatically shifting gears while driving. Often, leaking transmission fluid can be caused by the torque converter if there is failure or damage.


Are you leaking transmission fluid? Any reddish-color fluid underneath your parked vehicle is a sure sign of leaking transmission fluid. Though it may seem like the problem can wait, don’t delay because it could cause a major transmission problem if it goes unresolved. Need to get your vehicle checked out? Get your vehicle check out by the professionals at Eagle Transmission shop in Mesquite by calling us at 214-306-9786.

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