R32 Leaking Gearbox Oil

[-Jimmy-]

Hey guys,

I just got defected and it won't pass the inspection unless I have got rid of the gearbox leak.

There was a shit load of oil under the car and I've already replaced the rear seal behind the tailshaft and the shifter seal too. I have cable tied both ends of the shifter seal to seal it even better.

I cleaned up all of the oil and it still appears to be coming from the shifter area. I took it for a 15min drive after cleaning everything and let it cool down, then checked it after a few hours and there was about 4-5 big drops of oil ready to fall from the chassis.

What do you guys suggest I do? Should I just fork out and take it to a gearbox specialist or does anyone have any other suggestions? It's really frustrating me.

I have read it may tend to leak if it's a bit full but I haven't replaced it for months and it's been leaking a while, I doubt it would be still overfull if it was previously.

Thanks

[turboedsloth]

It could possibly be leaking from the shifter housing plate, there is a gasket there, which you can remove the 6 bolts i think and put some fresh sealant on there.

[-Jimmy-]

This actually makes a lot of sense! I'll try this.

[-Jimmy-]

Ok so it's definitely not coming from that part of the gearbox. I seem to think it's coming from the tailshaft yoke area now...

[turboedsloth]

If you grab the yoke and push it up and down, is the alot of movement?

[-Jimmy-]

This thread I came across seems to be a similar problem to what I have.

http://www.gmh-torana.com.au/forums/topic/36631-oil-leak-in-tail-shaft/

I had the tailshaft custom made (1 piece) by someone just like this guy.

It may be the Welch plug that needs replacing?

The thing is, I had it looked at by a gearbox place and they said it will be the welch plug, so I took it back to the place where I got the 1pc tailshaft made up and they said it'd be the rear seal, however I replaced that and it still leaks.

It makes sense now because now I remember it started leaking around that time I had the tailshaft done...

I might drop the tailshaft out and just seal it up temporarily, I really need this fixed for the pits inspection.

[turboedsloth]

It must have moved a bit or something to make it leak, i personally havent seen those plugs leak (not saying they can't tho). Temporary glue i would look at rtv blue or ultra blue. The ultra blue sticks like shit to fur and i use it often in gearboxes as a gasket. Don't use the clear stuff as it doesnt last. Probly clean the area with a good carby/brake cleaner as it dries clean

[turboedsloth]

ultra blue or ultra black that was meant to be

[-Jimmy-]

Cheers mate, yeah I thought it was a bit odd, I haven't seen it happen on any factory nissan parts but being a custom tailshaft might have something to do with it and I can't think of any other place where it would be leaking.

I'll give that a try after the easter period when I can get out to the shops again.

[Nic_A31]

Hey mate, I'm currently sorting the same problem.

Consider:

* Aftermarket tailsahft might have a slightly thinner yoke than the factory one.

I went to a place that sells just oil seals, o-rings etc, gave them the seal, and got one with a smaller inside diameter

(factory is 50 x 35 x 12, I got a 50 x 34 x 11 (12 not available))

I actually had to try a few different sizes, I eventually got one in that size, that had a metal sleeve on the outside, requiring it to be tapped/pressed into the gearbox (this gave it a tigher seal on the inside diameter).

* O-Ring on the speedo drive.

I replaced this as well, the same time as the metal sleeved output seal. Mine was flat, so I got a new one, it was alot harder to slide the drive back into the gearbox.

I couldnt see exactly where the leak was coming from, because soo much oil was leaking out of the gearbox, pretty much everything was drenched (even the exhaust, tunnel, floorpan had oil spilt all over)

Seems to have fixed the problem, whatever it was. But now I got another leak coming from a hairline crack on the gearbox housing :\

[-Jimmy-]

K so I took the tailshaft out today and had a bit of a look. Took a pic just to show you the welch plug.

I filled the yoke with water to the top and put my hand over the top to put some pressure down on the water and surely enough it started leaking water out of the welch plug. So what I'm going to do is now seal it and hope it's a good enough temporary fix so I can pass the inspection.

Edited April 26, 2011 by -Jimmy-

[-Jimmy-]

Sealed it up on the outside and inside, no more leaking now. It's just a temporary fix for now but hope to get it fixed properly eventually.