You'll need:
* A properly sized wrench: To remove the transmission pan plug (likely a 17mm or 19mm, but check your owner's manual or a repair manual to be certain). You'll also need a drain pan.
* Clean rags or shop towels: To clean the transmission pan and surrounding area.
* Gloves: Transmission fluid can be messy and irritating to skin.
* A transmission fluid temperature gun (optional but recommended): For accurate reading. The fluid level changes slightly with temperature.
* A repair manual: This is highly recommended for detailed instructions specific to your year and model.
Procedure:
1. Warm up the transmission: Run the engine and let it idle until the transmission fluid reaches its normal operating temperature. This is crucial for an accurate reading. Ideally, the fluid temperature should be around 150°F – 170°F. You can use a thermometer or a temperature gun on the transmission pan to determine this.
2. Find the transmission pan: It's located on the bottom of the transmission.
3. Park the vehicle on a level surface, engage the parking brake and chock the wheels. Safety first!
4. Remove the transmission pan plug: Carefully remove the plug using the wrench. The fluid will start to drain, so have your drain pan ready. Let a small amount of fluid drain. This amount is crucial for accurate reading. This is why a repair manual is important to check how much you should let drain.
5. Check the fluid level: The fluid should be close to the bottom of the hole of the drain plug. If the fluid level is significantly lower, it needs to be topped off.
6. Replace the transmission pan plug: Carefully tighten the plug, ensuring it's snug but not overtightened.
7. Top off the fluid (if necessary): If the fluid level was low, you'll need to add transmission fluid through the dipstick tube (if it exists). Some models may require topping it off with a funnel directly to the transmission pan. Make sure it is compatible with your transmission (Dexron or Mercon). Never overfill. Again, consult your repair manual for the correct fluid type and amount.
8. Check for leaks: After adding fluid, inspect the transmission pan and surrounding areas for any leaks.
Important Considerations:
* Repair manual: Using a repair manual specific to your 1973 Chevrolet with a Turbo 350 transmission is highly recommended. This will provide accurate diagrams, specifications, and torque specifications for the drain plug.
* Fluid type: Use the correct type of automatic transmission fluid specified in your owner's manual. Using the incorrect fluid can severely damage your transmission.
* Professional help: If you're uncomfortable performing this task, it's best to take your vehicle to a qualified mechanic. Incorrectly checking or servicing your transmission fluid can cause significant damage.
This procedure is a general guide. Always refer to a repair manual for your specific vehicle for the most accurate and safe instructions. Failing to do so could lead to transmission damage.
