Change the fluid when you notice:

• Rough or delayed shifting
• Burning smell
• Dark, dirty, or gritty fluid
• Unusual noises while shifting
  
  

For fleets, ignoring these signs can lead to transmission failures, higher repair costs, and unexpected downtime.

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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.

• Using the wrong fluid: Always check the manual to avoid damage.
• Incorrect fluid checks: Levels must be checked warm, with the engine running.
• Skipping warm-up: Cold fluid won’t drain fully.
• Ignoring the filter: A dirty filter reduces performance.
• Skipping safety steps: Always use jack stands and protective gear.

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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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