Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Long Does a Transfer Case Output Shaft Seal Last?

How Long Does a Transfer Case Output Shaft Seal Last?

transfer case output shaft seal

The transfer case output shaft seal is located on the transfer case of vehicles with four-wheel drive. This transfer case allows you to switch between two-wheel drive, neutral, to, low four-wheel, and drive four-wheel drive. The case consists of a chain drive and gear reductions. The transfer case uses the chain drive and gear reductions to transfer power from the transmission to either the rear differential or front differential, depending on what the wheel drive the driver chooses operate in.

The purpose of the transfer case output seal is to keep fluid from leaking out of the input shaft from the transmission. In addition, it helps to keep fluid from leaking out of the front and rear output shaft to the differentials. This keeps everything lubricated so it runs properly.

If one of these seals should leak, fluid will escape onto the transfer and it is no longer able to cool and lubricate the components. Ultimately, the internal parts will overheat, seize up, and fail. When this happens, the four-wheel drive will not work at all. It is recommended that your transfer case fluid should be changed every 30,000 miles, so your seals should be inspected during this time for any signs of wear.

The transfer case does not have a fluid level indicator, so if you do notice any fluid that is reddish in color beneath your vehicle it may be that you have a leaking seal. Since the transfer case output shaft seal can go bad and wear, it is important to know the symptoms so you can recognize them before they completely fail.

Signs that indicate your transfer case output shaft seal needs to be replaced include:

  • Difficulty shifting into gear

  • There is noise coming from all of the gears

  • The vehicle jumps out of low four-wheel drive mode

  • You notice a reddish fluid underneath your vehicle

  • Grinding noise from the middle of your vehicle while driving

  • The transfer case will not shift between two-wheel and four-wheel drive

If any of the above problems arise, have a certified mechanic replace the failing transfer case output shaft seal on your vehicle to eliminate any further problems with your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...

Related questions

Q: Front seal leak in minivan's transmission - 1997 Ford Aerostar

Hello. It sounds like your transmission either did not get completely full of fluid after the service or it is leaking fluid again. To check the transmission fluid, start the car and leave it in park. Next pull out...

Q: Leak in hatch

The weather stripping or rear hatch seal is the rubber seal that goes around the entire rear hatch opening. Two things that need to be checked for are one that there is no damage or wear to the seal itself...

Q: Front crank seal leaking

The crank seal is a straightforward repair. The seal is pressed into the timing chain cover, and its sealing lip rides on the harmonic balancer. If there is a groove, or the surface is pitted, the balancer will need to...