How to Replace Transfer Case Fluid

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Average rating from 52 customers who received a Transfer Case Fluid Replacement.

Four-wheel drive (4WD) and all-wheel drive (AWD) may operate differently but the theory is still the same. 4WD vehicles are generally a part-time system. They operate as rear-wheel drive until a switch or lever is activated, allowing the transfer case to “transfer” some of the power to the front wheels. AWD is typically a permanent four-wheel drive system, always engaged. Through the use of various sensors, AWD will vary the power split front and rear automatically. Both systems still use a transfer case to split the power to the front and rear. Transfer case fluid level and condition are vital to the longevity and proper operation of your 4WD and AWD systems.

Part 1 of 2: Draining the transfer case

Materials Needed

  • Drain pan
  • Filler/extraction syringe
  • Ratchet/sockets
  • Transfer case fluid - consult your owner’s manual for the correct fluid type and quantity
  • Wrenches - open/box end
  • Wheel chocks/blocks

  • Note: Since the majority of pickup trucks and SUVs have enough ground clearance, you generally will not need to lift the vehicle. If, however, your vehicle does not have enough clearance for you to lay underneath it, follow proper jacking instructions for your vehicle. Even if you must lift your vehicle, it must be level when refilling the fluid.

Step 1: Prepare the vehicle. Make certain the vehicle has cooled for at least 2 hours as to not handle hot fluids. Set the parking brake and chock/block at least one wheel front and back.

Step 2: Drain the fluid. The drain and fill plugs are generally located facing the rear of the transfer case and vehicle.

The lower plug is the drain and the plug located higher up is the fill. Remove the fill plug, then remove the drain plug. Allow the fluid to drain as long as possible as to extract the maximum amount.

Part 2 of 2: Refilling the transfer case

Step 1: Reinstall the drain plug. Once the fluid has drained completely, reinstall the drain plug, leaving the fill plug out.

  • Tip: Some fluid bottles come with a spout top so you can squeeze the fluid out through it. If there is not enough room under your vehicle to get it into the fill plug, the filler/extraction syringe listed in the materials needed will come in handy.

Step 2: Refill the transfer case. The transfer case does not have a dipstick to check fluid level. It is basically “fill till you spill.” Using either the fluid bottle top or syringe, fill the fluid into the filler plug hole until fluid runs out of it.

Step 3: Clean up. Reinstall the fluid fill plug. Wipe any excess fluid from the transfer case. Dispose of the use fluid properly. In most cases, your local auto parts store will take used oil/fluids and recycle them free of charge.

If your four wheel or all-wheel drive vehicle is due for a transfer case service, contact YourMechanic today to arrange for a mobile technician to come to your home or office.


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Recent Transfer Case Fluid Replacement reviews

Excellent Rating


YourMechanic Transfer Case Fluid Replacement Service

Average Rating

4.9/5

Number of Reviews

52

Rating Summary
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Joel

20 years of experience
766 reviews
Joel
20 years of experience
Jeep Wrangler - Transfer Case Fluid - Jacksonville, Florida
Joel promptly arrived at the appointed time. He was tasked with performing 5 maintenace services. He promptly completed the five tasks. In addition, he diagnosed another issue that I was going to achedule an inspection for, saving me the cost of the inspection. I had a good experience using Joel.
Cadillac Escalade EXT - Transfer Case Fluid - Jacksonville, Florida
Joel performed serpentine belt replacement, front differential service, engine cooling system flush, brake fluid flush and transmission fluid flush. He works efficiently, consistently and is very professional in communicating the completed tasks and whatever else needs to be done. I will certainly seek Joel for future maintenance on my vehicles. Make him YourMechanic..

Patrick

32 years of experience
1076 reviews
Patrick
32 years of experience
Hyundai Santa Fe - Transfer Case Fluid - Austin, Texas
Even after working on my car, he took the time to explain what he did, the parts, and any next steps. Very knowledgeable!

Robert

19 years of experience
654 reviews
Robert
19 years of experience
Ford Escape - Transfer Case Fluid - Louisville, Colorado
I've used Robert several times now, and he always exhibits a positive, 'can do' attitude and gets the job done. He's also very knowledgeable, friendly, and provides great advice.

Antonios

17 years of experience
51 reviews
Antonios
17 years of experience
Toyota RAV4 - Transfer Case Fluid - Sharon, Massachusetts
I highly recommend Tony. It's the second service he has performed on my car. This time he made sure I had the right spark plugs that best fit my Toyota. If I would have replaced the spark plugs myself would get the highest rated ones which are not the OEM for Toyota.

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