Trans leaking into Primary
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Joined: Jul 2009
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From: Straight Jacket Memories and Sedative Highs
I had 5 speed on lift for months without out primary, no dri. Recently 6 speed on lift and kick stand for weeks. You will see a little coming out the clutch rod. So gravity being what it is, it begs the question, how is it transfering?
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From: Texas
I spent a few years in general aviation after a couple tours and WestPac deployments as an AE working on the old war-horse Sikorsky H-3 and later A model Tomcats, but I never worked on those little bug thingies, though. When we were the Navy's front line of defense, we both learned how important it was to depend on logical assumptions and follow them when turn-around time is short and the mission is critical and the pressure is high. It is how we operated and it worked very well because we were in tune with the machines.
I am pretty well in tune with my 2003 Ultra but I do not know your machine like you do. However, like back then, I can look at the on-line parts fiche to see how it is put together and I am having difficulty envisioning the logic on how transmission oil can migrate into the primary or vice-versa unless both the transmission output shaft and the inner primary cover seals are really trashed.
If the output shaft seal is bad, it would seem there would be a lot of oil on the belt and pulley and undercarriage...and garage floor. And, if that much oil is moving from the transmission into the primary, then I would expect the shifting and clutch operation would be affected. Any transmission fluid that is being vented overboard under pressure will leave a trail, and that much being vented overboard should make a noticeable mess between the primary and transmission...and garage floor. It's just not a logical assumption that this much oil can migrate like it would have to without leaving some noticeable oil on the floor. I do not understand how the transmission can operate quietly and shift normally with that much oil missing or how the additional oil in the primary isn't noticeable.
You're missing something. I am thinking the transmission was not properly serviced last time.
I am pretty well in tune with my 2003 Ultra but I do not know your machine like you do. However, like back then, I can look at the on-line parts fiche to see how it is put together and I am having difficulty envisioning the logic on how transmission oil can migrate into the primary or vice-versa unless both the transmission output shaft and the inner primary cover seals are really trashed.
If the output shaft seal is bad, it would seem there would be a lot of oil on the belt and pulley and undercarriage...and garage floor. And, if that much oil is moving from the transmission into the primary, then I would expect the shifting and clutch operation would be affected. Any transmission fluid that is being vented overboard under pressure will leave a trail, and that much being vented overboard should make a noticeable mess between the primary and transmission...and garage floor. It's just not a logical assumption that this much oil can migrate like it would have to without leaving some noticeable oil on the floor. I do not understand how the transmission can operate quietly and shift normally with that much oil missing or how the additional oil in the primary isn't noticeable.
You're missing something. I am thinking the transmission was not properly serviced last time.
Last edited by skinman13; Nov 6, 2019 at 11:14 AM.
Banned
Joined: Jul 2009
Posts: 7,406
Likes: 834
From: Straight Jacket Memories and Sedative Highs
True. Mine are old frames, and I know very little does I know I have had my 6 speed on lift and ground with primary off recently or weeks. My 5 speed months on lift. Unless vent is block and pressurized I doubt it.
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