Step 1: Gather Supplies & Check the Manual

• Confirm the correct type and amount of fluid.
• Keep tools, rags, and safety gear ready.
  
  

Step 2: Prepare and Safely Raise the Vehicle

• Park on level ground; engage the parking brake.
• Warm the engine briefly, then turn it off.
• Lift the vehicle using a jack and secure it with jack stands. Never work under a vehicle supported only by a jack.
  
  

Step 3: Drain the Old Fluid

• Place a drain pan under the transmission.
• If there’s a drain plug, remove it.
• If not, loosen the transmission pan bolts carefully to control the fluid drain.
  
  

Step 4: Replace the Filter & Gasket (If Required)

• Remove the old filter and install a new one.
• Clean the pan and attach a new gasket before reinstallation.
  
  

Step 5: Reinstall and Add New Fluid

• Secure the drain plug or pan. Lower the vehicle.
• Use a funnel to pour in fresh fluid through the dipstick tube or fill port.
  
  

Step 6: Check the Fluid Level Properly

• Start the engine and cycle through all gears.
• With the engine running, check the dipstick and top up until the level reaches the recommended mark.
• Check for leaks underneath.

• Checking fluid incorrectly: When learning how to check and change transmission fluid, remember that most vehicles require the engine to be warm and running for accurate fluid level readings.
• Skipping the warm-up step: Cold fluid does not drain completely. If you’re changing transmission fluid or doing a drain-and-fill transmission fluid service, warm the vehicle first to remove old contaminants.
• Ignoring the transmission filter: Many transmission fluid change procedures require replacing the filter. Skipping it during replacing transmission fluid reduces performance and shortens service life.
• Treating difficulty lightly: Many people underestimate how hard it is to change transmission fluid. Always plan enough time—how long does it take to get a transmission fluid change depends on vehicle type and whether the pan and filter are involved.
• Rushing the process: Whether following how to drain automatic transmission fluid or how to change your transmission oil, rushing increases the risk of leaks, improper refill levels, and missed safety checks.
• Assuming all transmissions use the same fluid: Transmission fluid type varies by manufacturer and transmission design. Always confirm the correct fluid before replacing it.

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• Set fixed intervals for routine transmission fluid checks.
• Track fluid changes and reminders in your fleet maintenance system.
• Train drivers to report early warning signs.
• Keep the correct fluid type stocked to avoid delays.

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