1. Preparation is Key:
* Safety First: Wear safety glasses and gloves. Transmission fluid is messy and can irritate skin.
* Gather Supplies: You'll need a drain pan large enough to catch the fluid, a socket wrench (likely a 13mm or 15mm, but check your specific truck), rags or shop towels, and possibly some pliers for stubborn clamps. A funnel will help you refill later.
* Vehicle Preparation: Park on a level surface, engage the parking brake firmly, and let the engine cool completely. Warm fluid is thinner and will spill easier. Consider jacking up the front end for better access.
* Locate the Lines: Identify the transmission cooler lines. They are usually smaller diameter than the radiator's coolant lines. One line goes to the transmission and the other returns from the cooler.
2. Draining the Fluid:
* Position the Drain Pan: Place the drain pan under the lower radiator where the transmission cooler lines connect.
* Loosen the Clamps: Carefully loosen the clamps securing the transmission lines to the radiator. There are usually two lines, one in and one out. The clamps might be spring-type or screw-type.
* Disconnect the Lines: Gently work the lines loose from the radiator fittings. They may be tight. If they're really stuck, a little penetrating oil (like PB Blaster) applied a few hours beforehand can help. Work slowly to avoid breaking the lines. They are often brittle with age. Support the lines as you disconnect them to avoid dropping them into the drain pan.
3. Fluid Management:
* Expect a Mess: Some fluid will inevitably spill. The amount depends on how much is in the lines.
* Collect the Fluid: Carefully collect the spilled fluid with the rags. Dispose of the fluid properly according to local regulations (it's hazardous waste).
4. Reassembly (If reinstalling lines):
* Clean the Fittings: Clean the radiator fittings and transmission line ends before reconnecting.
* Reconnect the Lines: Carefully slide the transmission lines back onto the radiator fittings, ensuring a snug fit.
* Tighten the Clamps: Securely tighten the clamps to prevent leaks.
* Check for Leaks: After reconnecting, inspect for any leaks. Start the engine, let it idle for a few minutes, and check again.
Important Considerations:
* Line Condition: Carefully inspect the transmission lines for any damage. If they appear brittle, cracked, or kinked, replace them.
* Fluid Level: After reconnecting (or if replacing lines), you'll likely need to check and top off the transmission fluid level using the dipstick. Consult your owner's manual for the proper procedure.
* Professional Help: If you're not comfortable performing this task yourself, consider taking your vehicle to a qualified mechanic. Damaged transmission lines or incorrect fluid levels can cause serious damage to your transmission.
This guide provides general steps. The specifics might vary slightly depending on your truck's configuration. Consult a repair manual specific to your 1997 Dodge Ram 1500 for detailed diagrams and instructions. A picture of your specific setup would be helpful if you are having trouble.
