How Long Does a Transfer Case Output Shaft Seal Last?

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.


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Recent Transfer Case Output Shaft Seal Replacement reviews

Excellent Rating

(7)

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Chris

22 years of experience
2223 reviews
Chris
22 years of experience
Jeep Grand Cherokee V8-5.2L - Transfer Case Output Shaft Seal Replacement (Rear) - Rancho Santa Margarita, California
Chris was great he was able to do both jobs I needed done in actually less time then expected even with some set backs, I highly recommend Chris.
Hyundai Sonata - Serpentine/Drive Belt - Irvine, California
Chris was on time and professional.

Ben

41 years of experience
1410 reviews
Ben
41 years of experience
Jeep Wagoneer L6-4.0L - Transfer Case Output Shaft Seal Replacement (Rear) - Houston, Texas
Ben did a fantastic job!

Christopher

25 years of experience
80 reviews
Christopher
25 years of experience
Chevrolet Blazer V8-5.7L - Transfer Case Output Shaft Seal Replacement (Rear) - Slidell, Louisiana
Chris was professional and knowledgeable. Was able to diagnose the problem and fix the problem. Took the truck on a test drive to ensure problem was resolved. He then went over the entire vehicle to look for any other potential problem areas. I would highly recommend.

Jacob

12 years of experience
329 reviews
Jacob
12 years of experience
Jeep Scrambler L6-4.2L - Transfer Case Output Shaft Seal Replacement (Front) - Dallas, Texas
Jacob did a great job and was very thorough. Great attention to detail and left my garage cleaner than he found it. I've already booked another service with him.

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