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gtlaw
06-02-2008, 02:00 PM
with 400 miles on the odo I decided to switch the gear lube to redline mt-90. I took the car for a short drive, and when I unscrewed the fill plug it hissed. I couldn't tell if it was pulling vacuum or relieving built up pressure, but I thought it was odd. shouldn't there be a vent on the top side of the trans? I'm thinking mine is stuck closed if there is one.
gtlaw
06-02-2008, 02:17 PM
BTW the trans was still filled, and the drain plug wasn't removed yet. I know it would do that if it was draining at the time I removed the fill plug
Rotus8
06-02-2008, 03:54 PM
I have not found a vent. I looked for it too.
scatt nasty
06-02-2008, 05:56 PM
when i switched to mt90 mine made that noise too, at first i thought it was my friend under the car with me dicking around making noises with his mouth..but i think its just the air pressure or somethin. I havent had any problems since..
User Name
06-02-2008, 06:03 PM
You really shouldn't have the words friend, dicking, and mouth, in the same sentence like that.

jk.
gtlaw
06-04-2008, 12:23 PM
come on there is more than 5 people on this board maybe I should have put SRI or CAI in the title
blake_peanut
06-04-2008, 03:31 PM
come on there is more than 5 people on this board maybe I should have put SRI or CAI in the title

Haha down right hilarious! ^ Made me laugh!


Pretty sure there is no vent, your good!
GoFast
06-04-2008, 04:32 PM
come on there is more than 5 people on this board maybe I should have put SRI or CAI in the title

thats funny as hell!!

when i changed mine, i too looked for a vent and there was none. However, i did not get any hissing sound when i removed my tranny plug.
Shane5425
06-04-2008, 04:41 PM
the tranny was built at a differant altitude than what you are at.. so it seems like its a sealed unit.. bam.. pressure release..
ericrapp
06-04-2008, 05:24 PM
come on there is more than 5 people on this board maybe I should have put SRI or CAI in the title
There are eight people on this board. One of us needs to buy a shop manual. or 20 bucks a piece.
gtlaw
06-04-2008, 05:33 PM
thats funny as hell!!

when i changed mine, i too looked for a vent and there was none. However, i did not get any hissing sound when i removed my tranny plug.

did you drive it first or was it cold?
gtlaw
06-04-2008, 05:34 PM
the tranny was built at a differant altitude than what you are at.. so it seems like its a sealed unit.. bam.. pressure release..

makes sense I never thought of that
ericrapp
06-04-2008, 05:37 PM
the tranny was built at a differant altitude than what you are at.. so it seems like its a sealed unit.. bam.. pressure release..
Or would it create vacuum?
TurfBurn
06-04-2008, 05:38 PM
there is definitely a vent on top of the transmission. It is a little brass looking dome thing with a few holes on the side...
TurfBurn
06-04-2008, 05:39 PM
There is a certain level of pressure it requires though as they don't want a free exchange of air in there as it could cause corrosion. But when heat builds up it does let out some air so it doesn't blow out the seals at the axles.