# Is there a vent on a manual transmission for a 2003 Toyota Corolla? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** corolla, toyota\ **Created:** [September 9, 2013, 8:34pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270 "2013-09-09T20:34:19Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Dar1](https://avatars.discourse-cdn.com/v4/letter/d/74df32/32.png) [@Dar1](https://community.cartalk.com/u/Dar1)\ **Post date:** [September 9, 2013, 8:34pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/1 "2013-09-09T20:34:19Z")
Is there a vent on a manual transmission for a 2003 Toyota Corolla? If so, what is the location? ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 9, 2013, 9:28pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/2 "2013-09-09T21:28:39Z")
If I had to guess it’s the small silver cylinder sticking out of the top: ![](http://www.khengine.com/media/15/a20791b134014eb36c897_m.JPG) ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [September 10, 2013, 12:15am UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/3 "2013-09-10T00:15:20Z")
I’m pretty sure this is the same C59 5-speed transmission as in my 2006 Matrix. The two times I’ve changed the oil I get a puff of air when I remove the fill plug, so it doesn’t seem to have a free flowing vent. I think that’s odd, but if it ain’t broke… ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [September 10, 2013, 1:34am UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/4 "2013-09-10T01:34:20Z")
All gear assemblies require some sort of vent on their case. Without it, the gears/oil in the case would heat up, build pressure and blow the seals out. The vent is located on the highest part of the case. Tester ---
**Author:** ![Dar1](https://avatars.discourse-cdn.com/v4/letter/d/74df32/32.png) [@Dar1](https://community.cartalk.com/u/Dar1)\ **Post date:** [September 10, 2013, 9:36pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/5 "2013-09-10T21:36:11Z")
Thanks for the info. I had the same problem when taking out the plug after the car had been sitting for 24 hrs. and there was pressure in it. My car seems to be running rough and I suspect it may be the transmission. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 10, 2013, 9:37pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/6 "2013-09-10T21:37:47Z")
A plugged vent on a manual transmission will not cause a car to run rough. ---
**Author:** ![HHRGuy](https://avatars.discourse-cdn.com/v4/letter/h/76d3ee/32.png) [@HHRGuy](https://community.cartalk.com/u/HHRGuy)\ **Post date:** [September 10, 2013, 9:47pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/7 "2013-09-10T21:47:40Z")
Agree with texases. No link between two. ---
**Author:** ![Dar1](https://avatars.discourse-cdn.com/v4/letter/d/74df32/32.png) [@Dar1](https://community.cartalk.com/u/Dar1)\ **Post date:** [September 11, 2013, 8:55am UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/8 "2013-09-11T08:55:13Z")
Bad choice of words. What happens is when I put it in 2nd gear, I start hearing noise, 3rd and 4th and 5th gear the noise get much louder. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [September 11, 2013, 7:59pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/9 "2013-09-11T19:59:41Z")
This trans from 2003-4 have had a lot of bearing failures. In 2005 they improved it. ---
**Author:** ![Dar1](https://avatars.discourse-cdn.com/v4/letter/d/74df32/32.png) [@Dar1](https://community.cartalk.com/u/Dar1)\ **Post date:** [September 11, 2013, 9:20pm UTC](https://community.cartalk.com/t/is-there-a-vent-on-a-manual-transmission-for-a-2003-toyota-corolla/81270/10 "2013-09-11T21:20:50Z")
So I guess the transmission is going out?