At wits end with trans leak
Outstanding HDF Member
Joined: Jun 2007
Posts: 3,306
Likes: 5
From: Bellville, Tx
The only thing not mentioned is if the vent is clogged the pressure in the trans will force oil past the seals. The same can happen if the trans is over filled significantly. Good luck, seals can be frustrating.
Thread Starter
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Cruiser
Joined: Mar 2010
Posts: 237
Likes: 12
The last one I changed was in the same vicinity as the quad seal and spacer I changed. I believe this one to be the main shaft seal.
Outstanding HDF Member
Joined: Oct 2010
Posts: 2,706
Likes: 14
From: Near Frankenmuth, MI
I've had a fresh inner primary seal get snagged on the race and damaged while assembling. A real pisser to do all that work over and over.
Last time it was the seal between the input / output shaft on the tranny and fluid poured out of it on the side stand and pooled a good puddle.
Now it's a drip every time I park the bike and it's still wet on the lower inner primary. Definitely the primary fluid. UGH!
Last time it was the seal between the input / output shaft on the tranny and fluid poured out of it on the side stand and pooled a good puddle.
Now it's a drip every time I park the bike and it's still wet on the lower inner primary. Definitely the primary fluid. UGH!
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
Likes: 1,524
From: Coromandel Peninsula New Zealand
Look carefully at the surfaces where all the seals sit...are they worn or grooved? If they are it is likely that the groove tears the seal apart and the race or spacer or shaft (depending on which seal leaks) needs replacing along with the seal.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,626
Likes: 6,443
From: Honah Lee
You can see why this is a difficult place to get correct with 3 different sealing areas. Two OD type and the quad face seal. If you do ytube and do the video of the old evo mod for before the quad seal will give you an idea how all this goes together.
Stellar HDF Member
Joined: May 2009
Posts: 2,856
Likes: 127
From: Middle of Kansas
So far mine only drips about one drop after a hard 150 mile ride. After listening to you guys I think I can live with it. LOL. After saying that, it will probably make a puddle tomorrow.
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Joe Kucinski
Road Master
Joined: Aug 2010
Posts: 1,205
Likes: 18
From: SE Michigan
Head schratcher?
If the mainshaft was warped it would do more than just leak!!! You would have vibration, tight spots in your primary and possibly some shot bearings.
Look carefully at the surfaces where all the seals sit...are they worn or grooved? If they are it is likely that the groove tears the seal apart and the race or spacer or shaft (depending on which seal leaks) needs replacing along with the seal.
Look carefully at the surfaces where all the seals sit...are they worn or grooved? If they are it is likely that the groove tears the seal apart and the race or spacer or shaft (depending on which seal leaks) needs replacing along with the seal.
Actually, I'm wondering if it's not another seal leaking like the shifter shaft seal. I'm going to be taking it to a 3rd Indie who has guaranteed me he will stop the leak.
Elite HDF Member
Joined: Mar 2006
Posts: 3,673
Likes: 606
From:
i had a leak that i couldn't figure out. it was the splines on the main gear where the pulley goes were worn. if the pulley isn't tight on the splines it will wobble and that will make the spacer behind the pulley move which will make the trans leak. the only cure if the splines are worn is the replacement of the main gear.