* Low Fluid Level: This is the most frequent cause. Low fluid means increased friction within the transmission, generating heat and ultimately burning the fluid. Leaks are the most common reason for low fluid, but incorrect fluid level during a service can also be a problem. Check for leaks around the pan, seals, and lines.
* Internal Transmission Problems: Worn clutches, bands, or other internal components increase friction and heat. This could be due to age, wear and tear, or previous abuse. These internal issues are often accompanied by other symptoms like slipping gears, hard shifting, or unusual noises.
* Torque Converter Issues: The torque converter acts as a fluid coupling. Problems within it (e.g., a faulty pump, internal wear) can lead to excessive heat generation and fluid burning.
* Overheating: Driving conditions that cause the transmission to overheat (e.g., prolonged towing, extensive stop-and-go traffic, driving uphill for extended periods) can degrade the fluid quicker. A malfunctioning transmission cooler can also contribute to overheating.
* Incorrect Fluid Type: Using the wrong type of transmission fluid can dramatically reduce its lifespan and lead to burning. Always use the fluid specified by Cadillac for that year and model. Mixing different types of fluid is especially detrimental.
* Clogged Filter: A clogged transmission filter restricts fluid flow, increasing pressure and heat. This is less common as a primary cause of burning, but it can contribute to the problem.
In the case of a 1984 Cadillac Eldorado specifically: These cars are quite old, so it's likely a combination of age-related wear and tear, along with potentially a neglected maintenance schedule. The age itself makes internal component wear a prime suspect.
Troubleshooting Steps:
1. Check the Fluid Level: This is the first and most important step. Use the dipstick (if equipped) to check the fluid level when the transmission is warm (after driving). Note the color and smell of the fluid.
2. Inspect for Leaks: Carefully examine the transmission pan, lines, and seals for any signs of leaks.
3. Check the Transmission Cooler: If your Eldorado has a separate transmission cooler (often located in front of the radiator), check its condition for damage or blockages.
4. Consider Professional Diagnosis: Given the age of the car, it's often best to have a qualified mechanic diagnose the issue. They can perform a more thorough inspection, including testing the fluid, checking for internal problems, and identifying the root cause.
Burning transmission fluid is a serious issue that requires prompt attention. Ignoring it can lead to complete transmission failure.
