Right Rear Axle Seal Leaking - Toyota Tundra Forums : Tundra Solutions Forum
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post #1 of 2 (permalink) Old 06-24-2016, 12:37 PM Thread Starter
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Right Rear Axle Seal Leaking

I have replaced the right rear axle seal twice on my 2006 Tundra and it starts to leak 1 to 2 weeks after. What could be the problem? Thanks
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post #2 of 2 (permalink) Old 07-03-2016, 06:09 AM
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Re: Right Rear Axle Seal Leaking

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Originally Posted by shavelle View Post
I have replaced the right rear axle seal twice on my 2006 Tundra and it starts to leak 1 to 2 weeks after. What could be the problem? Thanks

Could be a number of things:

  • The rear axle seal has a very specific installation depth - too deep inside the axle housing and it will not make contact with the chamfer on the axle allowing gear oil to get past it, too shallow and it rubs against the chamfer and wears out prematurely.

  • The seal itself may have been damaged during installation or damaged right out of the packaging.

  • The axle chamfer may have a nick on it which causes it to cut the axle seal.

  • The axle housing in which the seal is seated may have a nick or gouge which would allow gear oil past the seal.

  • You rear differential breather may be clogged. Gear oil and differential parts heat up during driving causing the air to expand and push past the seals which allows oil past the seals.


I guess we need to confirm that the axle seal is actually what is leaking. Does the fluid have a very distinct odor to it? If not it may be the slave cylinder for the drum brakes leaking.
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