Primary vent causing a different transfer problem?
Cruiser
Joined: Aug 2017
Posts: 234
Likes: 320
From: Netherlands
My gues it has something to do with the preload of de clutchrod and perhaps the spinning of this part in the touring setup.
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,473
Likes: 3,950
From: Vermont
Well I have a 19 rgs. Noticed transfer at 5000 miles. Got the vent. Seemed to be doing good until recently. Dont know when, but it sure happened again. Checked today (05/24/20) at 14,700 miles. Transmission was damn near dry. Taking it to the dealer on Tuesday when they open.
Stage III
Joined: May 2020
Posts: 3
Likes: 0
From: Minnesota
this is the first thing I asked them this morning. I will update as soon as they call me back
Road Warrior
Joined: May 2011
Posts: 1,956
Likes: 437
From: florida
Let me wrap this around my brain... Apparently the transfer of oil from the transmission to the primary is cause by a negative pressure, a vacuum build up, in the primary sucking the transmission oil into the primary. The vent releases this vacuum stopping the transfer. Now this individual claims releasing this vacuum in the primary is causing a higher pressure in the crank case to move oil to the primary? If there is an issue with engine to primary transfer wouldn't a non-vented primary make a high crankcase pressure transfer more engine oil in a primary with a negative pressure builded up?
You either didnt read his post or didnt understand.
The LACK of primary pressure causes the crankcase backside seal to leak.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,463
Likes: 2,990
From: Charleston, SC
True, but it has nothing to do with this problem.
Last edited by lp; May 27, 2020 at 07:07 AM.
Stellar HDF Member
Joined: Apr 2007
Posts: 2,339
Likes: 486
From: Nor Cal
Well I have a 19 rgs. Noticed transfer at 5000 miles. Got the vent. Seemed to be doing good until recently. Dont know when, but it sure happened again. Checked today (05/24/20) at 14,700 miles. Transmission was damn near dry. Taking it to the dealer on Tuesday when they open.
HDF Community Team
Joined: Mar 2017
Posts: 7,821
Likes: 4,381
From: Texas
Guessing he meant the dipstick was damn near dry? If so, that means it's only about 4oz low (28oz in the trans instead of 32oz, not quite damn near dry for the whole trans)
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The cable side cover allows the oil to drain back to the transmission. It is pretty well open.
The hydraulic side cover traps oil, if get past the hole and into the actuator cavity it is very hard for it to drain back, so if there is vacuum in the primary it will get sucked across.
Opening the actuator cavity and relieving it so that oil drains back has proven to stop the transfer problem.
Road Warrior
Joined: May 2011
Posts: 1,956
Likes: 437
From: florida
Well I read it differently. I realize it’s his opinion but his point right or wrong was that the primary vent tube fix is the problem, causing not enough primary pressure which in turn creates an engine seal leak. The vent is the problem. His pushrod is the best solution. His words not mine