Leaking Transmission Oil

Hey,

Ever since my transmission oil was changed it has been leaking onto my exhaust and burning At first we thought that it might have been over filled, but it's been going on a little too long for that. Ideas?

It's the stock 5-speed manual box and it's running Redline Lightweight Shockproof oil...

 

I believe that this oil can foam a bit and come out the breather.

EDIT: Might be a stuffed breather, see Tekkies post below. Apparently some cars leak and some don't.

http://www.aus300zx.com/forum/showthread.php?t=285419

And this:

http://www.aus300zx.com/forum/showthread.php?p=1051095&highlight=gearbox+breather#post1051095

 

stick it up onto a hoist to bet a good look where its commin from

 

I don't have a hoist I have a jack, will that do? lol

If it is the breather how do I fix it? I saw reference to a "breather hose"...

 

Don't jack from the radiator support.

Don't get under a car with out a secondary support, ie stands and a jack.

Don't use bricks they have a nasty habit of crumbling.

Sorry but the "I have a jack, will that do?" sounded ominous.

 

lol, it was meant to sound ominous... I know you need to use axle stands or something similar. I tend to use pavers. They're much more solid than bricks, and tend not to crumble because they're not hollowed out

 

find where it's leaking out from.

redline shockproof has a way of finding its way through shagged 20 year old seals and i experienced this first hand. when the box heated up it would leak out the front and the back, smoke pouring out from under the car from the exhaust evaporating the fluid which sounds like what you're experiencing.

unfortunately if this is the case it's tranny out for new seals.

 

Sounds about right

How much for new seals? Where would I get them from?

 

Nissan Rockingham on Dixon Road.

Part numbers:

 

Rear main seal, $20 part (Nissan dealer) - gearbox out jobby.

 

Well you can increase the height of the breather. Push a tube onto the hook end and drag the end up high into the engine bay, Put a little filter on it.

That should do it.

 

Vaccuum hose? EFI hose?

I am replacing my clutch today and also using lightweight shockproof, and have had enough of flames and smoke from under my car thanks very much :zlove:

 

I shall now be able to attend Aidan's Tech Day tommorrow So hopefully we can track down what's causing it then ^_^ Thanks everyone for your input and advice

P.S. Thanks for the diagram Vadar but... which actual part is it that is the 'rear main seal'?

 

Fuel hose should be good enough. There is No pressure in it.

 

Thanks Graham, I had a 500mm length of vaccuum hose and it did the job nicely. Tied the other end up near the fuel hard lines (near the filter) with a cable tie.

 

Just called the Nissan Dealer to order this part in preparation for Aidan's Tech Day (silly me turned up last Saturday...) Anyway, they said that there is no "Rear main seal" for the gearbox, only on the engine. Which part should I be asking for?

 

is the front of your box leaking or the rear of your box??

 

if its the front youll need 32113 and 32112 if its the rear youll need 32136

 

just get all the seals for the gear box and we will do them all in 1 hit think its a total fo $80 for the seals

 

Shamas, I have the following parts here at my place:
32112 (Front cover Gasket)
32114 (Front cover oil seal)
32136 (Rear main oil seal)
12279 (Crankshaft Oil Seal)

Was going to swap out my gearbox, and decided I didn't need to.

Original prices were:
32112: $21.65
32114: $Dunno, can't remember
32136: $27.03
12279: $60

PM me if you want to buy any or all these (they are all still in their original packaging).