# Which gasket is this that is leaking?

**URL:** <https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853>\
**Category:** Maintenance/Repairs\
**Created:** [September 12, 2020, 3:40pm UTC](https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853 "2020-09-12T15:40:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Ross85](https://avatars.discourse-cdn.com/v4/letter/r/85e7bf/32.png) [@Ross85](https://community.cartalk.com/u/Ross85)\
**Post date:** [September 12, 2020, 3:40pm UTC](https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853/1 "2020-09-12T15:40:47Z")

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When I was underneath my 2006 3.3L V6 Toyota Highlander doing work I noticed some oil leaking from a gasket (shown by green arrow in image below). Can someone tell me which gasket this is? Thanks

 ![leak](https://global.discourse-cdn.com/cartalk/original/3X/8/3/8395dd7d84666984f523712c90c4e8d9e46f0d32.jpeg)

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**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\
**Post date:** [September 12, 2020, 5:24pm UTC](https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853/2 "2020-09-12T17:24:28Z")

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Looks like transmission oil but I could be wrong.What is the color of the liquid?

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**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [September 13, 2020, 3:09am UTC](https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853/3 "2020-09-13T03:09:36Z")

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My best guess is the leak is at the center differential case mount. I’m assuming it’s an all wheel drive.

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [September 13, 2020, 3:38am UTC](https://community.cartalk.com/t/which-gasket-is-this-that-is-leaking/169853/4 "2020-09-13T03:38:10Z")

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That is the all wheel drive transfer unit, the cover is sealed with Form-In-Place-Gasket (RTV).

The transmission must be removed before the transfer unit can be separated from the transmission, a 15 hour job to real that cover.

I have seen many of those seep gear oil, I would top off the level and check the level at each oil change.