* "400 Transmission" is vague: There are many different transmissions that could be called a "400". For example, "TH400", "Powerglide 400" etc. Each has different mounting points, bolt patterns, and input shaft sizes.
* "307 Chevy engine" is also broad: The 307 was produced over several decades. Different years had different bellhousing bolt patterns and even slight variations in the input shaft length on the engine.
To find out if a specific transmission will work with a specific engine, you need to know:
1. Exact transmission model: What is the full designation? TH400, Powerglide 400, etc.
2. Specific engine year and model: This will help you determine the correct bellhousing bolt pattern.
3. Input shaft compatibility: The transmission's input shaft needs to match the engine's output shaft.
Here's how to find this information:
* Transmission ID tag: The transmission usually has an ID tag with its model and other details.
* Engine block: The engine block will often have casting numbers that can be used to identify the year and model.
* Online resources: Websites like ChevyTalk, Summit Racing, or Jegs often have detailed information about engine and transmission compatibility.
* A local mechanic: A knowledgeable mechanic can inspect both the engine and transmission to determine compatibility.
Remember: Even if the bolt patterns and input shafts match, you might need an adapter plate or other modifications to ensure a proper connection.
