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Transfer case is overfull - 2005 Ford F-150

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You can drain to the appropriate level and recheck after driving. The rear main on the transmission may be leaking into the t-case causing the condition. Advise checking the transmission level. Engine hot, vehicle level and running in park or neutral. This could be a good indication of leakage if low.

Posted on Jan 20, 2013

  • comjoe Jan 22, 2013

    Thanks for the info. I found that I had to replace the seal on the input shaft of the transfer case. Time consuming but not overwhelming.



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2001 chevy blazer transfer case removal

How to Remove a Chevy Blazer Rear Transfer Case The transfer case on a Chevrolet Blazer is underneath the vehicle, mounted to the rear of the transmission. On four-wheel drive vehicles, the transfer case takes power generated by the engine and channeled through the transmission and directs it to the front and rear drive axles. Over time, the gears and bearings inside the transfer case can wear and the transfer case must be rebuilt. The transfer case on this vehicle must be removed before it can be serviced.
Things You'll Need
  • Wrench set
  • Floor jack
  • Jack stands
  • Socket set
  • Masking tape
  • Marker
  • Needle-nose pliers
Hide Instructions
  1. Removing the Driveshafts
    • 1 Disconnect the ground cable from the negative battery terminal, by using a wrench to loosen the retaining bolt and pulling the clamp off the terminal.
  • 2 Raise the vehicle and support with jack stands placed underneath the frame.
  • 3 Drain the transfer case. Locate the drain plug near the bottom of the transfer case. Place a waste oil collection pan underneath the plug and use a socket to remove it. Once all the fluid has drained out, reinstall the plug.
  • 4 Remove the bolts that connect the rear driveshaft to the rear axle yoke using a socket. Lower the driveshaft, and slide it backward underneath the rear axle to disengage it from the transfer case. Remove it from the vehicle.
  • 5 Remove the bolts that connect the front driveshaft to the front axle yoke using a socket. Lower the driveshaft, and slide it forward underneath the front axle to disengage it from the transfer case. Remove the driveshaft from the vehicle.
  • Removing the Transfer Case
    • 6 Label and disconnect the electrical wires and vacuum lines connected to the transfer case. Use masking tape and a marker.
    • 7 Remove the transfer case shifter rod. Using needle-nose pliers, remove the clip that connects the shifter rod to the transfer case. Slide the rod away from the transfer case.
    • 8 Position a floor jack underneath the transfer case. Raise it enough to take the weight of the transfer case off the transmission.
    • 9 Remove the bolts that connect the transfer case to the transmission using a socket or wrench.
    • 10 Slide the transfer case rearward to disengage it from the transfer case. Lower the floor jack, and remove the transfer case from the vehicle

    Jul 27, 2014 | Cars & Trucks

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    Over filled transmisson oil

    Loosen (not all the way) one of the transmission cooler lines at the radiator, and run the engine until it's not overfull. If it's jus a little overfull don't worry about it is really messy to try to let some out.

    Mar 12, 2014 | Chevrolet Cars & Trucks

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    I have an 1998 chevy s10 automatic.this morning I noticed transmission fluid on the ground I checked and it comes out from a hose on top of the transmission but I don't see where it hook up?

    From what I have read elsewhere: There is an overflow hose on top of transmission behind engine which actually is from the transfer case. Fluid will drip down onto exhaust and eventually catch on fire. Check transfer case for being overfull by taking the top fill plug out. If transmission fluid runs out, I believe the transfer case input shaft seal is shot and needs replaced. Mine caught on fire. I was lucky to get fire out before truck burnt to the ground. If you continue to drive vehicle at have something to put out a fire!!!!

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    2002 yukon front end wont engage

    2002 GMC Yukon

    2002 GMC Yukon

    2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

    2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV


    Transfer Case No Front Drive



    DEFINITION: The transfer case is not delivering engine torque to the front propeller shaft.

    Review the Symptoms - Transfer Case and perform the necessary inspections.

    Viscous coupling faulty 1. Inspect the transfer case fluid for being black. If the fluid is

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    2. Test for a faulty viscous coupling. Refer to Transfer Case

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    3. Disassemble the transfer case. Refer to Transfer Case

    Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

    4. Inspect the viscous coupling for a bulged cover. Refer to

    Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit


    5. Replace the viscous coupling if it is faulty. Refer to Transfer

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    2. Inspect for faulty planetary carrier components. Refer to

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    3. Replace any faulty planetary carrier components. Refer to

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    There should be a dip stick near the rear of the engine compartment with a red handle on it for the transmission. You want to check the trans fluid with engine idling and the trasmission in park. If it's full of fluid and the vehicle won't move you are most likely looking at rebuilding the trans. To change the fluid you have to drop the pan off the tranmission and the filter is inside. The filter just pull out, the new filter will come with a new seal that presses into the the pump housing. DO NOT attempt to change that seal, leave the old one in place, unless it is damaged. Unless you you have the proper tools to replace that seal you will most likely damage the transmission housing trying to remove the old one. Also, if the transmission is low on fluid, where did it go? Is it leaking on the ground? You may want to check the transfer case oil if it's way overfull the seal between the transmission and transfer case is bad and the trany fluid is leaking into the transfer case. You may want to change the transfer case oil too, they both take Dexron III fluid. Good luck!

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    Transfer Case Assembly - REMOVAL & INSTALLATION

    Samurai Models
    Even the 2WD Samurai uses a transfer case. Rather than use a straight line driveshaft from the transmission to the differential, the Samurai leaves the transfer case in place and replaces its internal working with a simple offset gear mechanism, thus keeping 2 of the 3 driveshafts used in the 4WD vehicle.
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    6. On 4WD vehicles, install the transfer case shift lever.
    7. Remove the jackstands and carefully lower the vehicle.
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    On these models the transfer case is bolted to the transmission and takes the place of the 2WD transmission's extension housing. Therefore, transfer case is removed or installed as part of the transmission assembly.

    Hope this help (remember rated this and comment).

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