To determine the correct fluids, you need to:
1. Identify the Engine: Look for an engine ID tag (often on the engine block itself) This will tell you the engine's displacement (e.g., 241ci, 270ci, 301ci, or possibly a Hemi). This is crucial for knowing the correct oil viscosity. Older engines often preferred a straight-weight oil (like SAE 20 or 30), whereas modern oils are multi-viscosity (like 10W-30 or 20W-50). Consult a 1956 Dodge Coronet repair manual or a classic car parts supplier for the correct oil viscosity for your specific engine.
2. Identify the Transmission: Is it a manual transmission (likely 3-speed) or an automatic (likely PowerFlite)? This is vital because the fluid types are completely different. Automatic transmissions require a specific type of ATF (Automatic Transmission Fluid). Manual transmissions use gear oil. Again, a repair manual or parts supplier will specify the correct type.
Where to find the information:
* 1956 Dodge Coronet Repair Manual: This is the best resource. It will detail the exact specifications for your specific vehicle. You can often find these online or through classic car parts suppliers.
* Classic Car Parts Suppliers: Places that specialize in parts for classic cars (like Classic Industries, NPD, etc.) can help you determine the correct fluids based on your engine and transmission details.
* Online Forums: Forums dedicated to classic Dodge or Mopar vehicles may have owners with similar cars who can provide guidance. Be sure to provide the engine and transmission details when asking for help.
Important Note: Using the incorrect oil or transmission fluid can severely damage your engine or transmission. Take the time to identify your specific engine and transmission before adding any fluids.
