* Multiple Options: Chevrolet offered several different transmission options for the 1991 Suburban with a 350 engine and 4WD. These could include:
* TH400: A heavy-duty 3-speed automatic.
* TH700R4: A more fuel-efficient 4-speed automatic.
* 4L60E: An electronically controlled 4-speed automatic (often found in later models).
* Identification is Key: The best way to determine the specific transmission in your Suburban is by looking at the identification tag located on the transmission case itself. The tag will contain a series of numbers and letters that will help you identify the model.
Here's how to find the identification tag:
1. Locate the Transmission: The transmission is located in the center of the vehicle, between the engine and rear axle.
2. Look for the Tag: The identification tag is usually attached to the transmission case, towards the rear of the transmission. It might be on the passenger side, driver's side, or on top of the transmission.
3. Note the Information: Once you find the tag, carefully note down the information it provides, including the model number and any other identifying codes.
After you have this information, you can:
* Use Online Resources: Search online using the transmission identification code to find details about your specific transmission, including its size and compatibility with your vehicle.
* Contact a Transmission Specialist: Consult a transmission specialist or a mechanic who specializes in Chevrolet vehicles. They can help you determine the correct transmission size and provide expert advice.
Remember: It's crucial to identify the transmission correctly before purchasing parts or undertaking any repairs.
