Transmission under pressure?

[Puy07Norge]

After a rare Pacific Northwest sunny day ride, I decided to drain the Norge's ('07) transmission and differential fluids for replacement.  I anticipated fluid draining out of the transmission in a somewhat out of control fashion, due to the drain plug's positioning.  But I wasn't ready for the transmission to blast it's contents out in one big bang!  Wow.  The fluid sprayed out under an impressive amount of pressure.  Clean up on aisle 5!  Is that normal?  No big surprises draining the dif.  Thank you.

BC

[i HONK]

Check the vent line for an obstruction, bends, kinks, crud............etc .  Let us know what you uncover.
My Norge at 95,000 miles never had an issue....Randy

[pete roper]

Check the breather isn't blocked or pinched.

[Puy07Norge]

I finally dug the complete airbox out of the Norge.  The transmission vent hose leads up to the top/rear of the air box next to another vent hose.  I disconnected the vent hose from the transmission and airbox... ran compressed air through it... it flowed... slightly restricted, but decent.  Then I put compressed to the hose's attach nipple on the airbox... it wouldn't flow at all!  I had a good seal on it with 40 PSI... nothing!  Looking into the nipple, it looks like it's blocked off!  Is that possible?  Is there some sort of diaphragm, actuated by the other hose?  Feeling inside the airbox, it feels like there's some sort of oval shaped compartment, shared by both hoses.  Does the transmission really need to vent into the airbox?  The good news is... the leak that I had between the engine and the transmission will most likely stop once the transmission is vented properly.  Oh, and the rest of the engine looks oil tight.  How do you get those inner spark plugs out?!  Looks pretty tight in there.

[pete roper]

No, the gearbox hose simply vents to atmosphere. It should be stuck under the snorkel on the airbox, not attatched to that blank nipple on the airbox.

Pete

[Sasquatch Jim]

 It did it just to piss you off.  Anthropomorphic bikes are like that.

 All you folks brag about how Guzzis have personality, there's the proof.

[Puy07Norge]

Thanks!  I'll leave the hose vented freely.  Now I've started doing all the 12k items.

BC