R33 Gtst 5 Spd Tranny Leaking Oil Through Vent Tube

[WidnerR33GTSt]

94 R33 GTSt 5spd Manual. Just changed the gear oil with 3.5 liters of Redline Lightweight Shockproof (smurf blood). Shifts fine. After driving for approx 200 kilometers, I started smelling gear oil. I looked under the car and the tranny was covered with the smurf blood. I tracked down the source to the TOP FRONT of the tranny. There is a small metal tube that begins down near the end/bottom of the tranny and runs along the top and ends in the front. This tube is "dumping" out the smurfs blood.

I cleaned the transmission fully. Took the car out for a test drive throughout some low speed roads. No leak. I then took the car on the freeway at 120kph for a solid 20 minutes. I started smelling the gear oil again. The "vent tube" is dumping out the smurfs blood again.

ANY IDEAS? HAS ANYONE EXPERIENCED THIS BEFORE?

The tranny shifts fine. I didn't overfill; as soon as it began dripping out of the filler plug I stopped. The car was on 4 jack stands - level. HELP as I run this car on tracks here in the US and have an event coming up on 4 October 2008.

I'm thinking of going with Mobil 1 75W-90 as I "believe" the Redline (which acts like a 75W-140) may be too much and causing too much pressure and relieving it through the vent tube? THOUGHTS?

www.cardomain.com/ride/835297

Edited September 19, 2008 by WidnerR33GTSt

[WidnerR33GTSt]

No body has ever had this happen? Surely someone has?

www.cardomain.com/ride/835297

[Gtrgodzilla67]

for some reason the transmission is building up pressure inside the box when it gets hot or you over filled it lol

or the hose is crimped/blocked causing pressure to biuld up then shoot out oil, check the beather/line to see if its blocked or restricted in anyway,

gl with it, have seen this before and its usally a breather problem, or to much oil

[WidnerR33GTSt]

Will it stop when the oil level is correct?

I've seen some recommend 2.5 liters and others 3.5 liters. I filled it until it was dripping out of the filler.

What does gl with it mean? Sorry...don't understand that.

[R31Nismoid]

Its normal.

Some boxes just breath a little.

Extend the breather hose a bit, thats how mine is done and doesnt leak

I recently found out one car i know of runs a mini catch can

It runs an after market gearset, and its apparently been seen to occur before, not all that common but happens

[WidnerR33GTSt]

THANKS...appreciate the answer. I was "thinking" the same...just want to make sure.

So is it due to the 75W-140 characteristics of the Redline Shockproof Lightweight gear oil? I used to have Mobil 1 75W-90 in it...and it never (in 4 years) breathed.

Should I have a lower level of Lightweight Shockproof oil in it than I would using "normal" oil?

Will it stop when the level gets down to a certain point?

[trel]

It will stop, you've 99% overfilled it and when giving it a little shit, the pressure builds up and leaks out of the breathers. Drain a bit or let it leak it out till it settles. Eitherway your not damaging anything.

[WidnerR33GTSt]

Thanks guys. I just ran the "dog" out of it on the freeway (140kmph) for a good 20 minutes...it leaked a little more. I'm going to put it up on 4 jack stands and check the level. I'll let you know how it turns out.

www.cardomain.com/ride/835297

[WidnerR33GTSt]

Checked the level. It is fine. It is just below the lip of the filler plug.

I guess when you use the Redline Lightweight Shockproof you use less than other oils? I'm going to run her hard tomorrow on the freeway and see if it "breathes" out anymore.