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Sorry Marshall, but the oil level in the trans will never get high enough to
come out the vent. A clogged vent will make the trans hard to fill, and it is
there for expansion as you said. The vent is located on the top edge of the
output shaft support on the PF and TF. On the 727, it is in the front pump up
towards the top. John Grady had a good reply on what happens in the converter
when it drains back. The only positive seal there is the front pump seal. Air
can enter from inside the trans in a number of ways. The drive sleeve has an
O-ring on one end, but a steel ring on the other. You also have a metal to metal
contact between the pump and regulator housing. The input shaft going into the
converter also has steel rings with a small gap. When everything is tight and
perfect, drain back will be minimal, but air will still displace the fluid
eventually. The external seals are usually good enough to keep the fluid where
it belongs, but any wear on the throttle shaft or shift cable housing can be a
leak point. More on this at the Spring meet transmission seminar. Don I believe all transmissions have a vent that serves the same function as
the vented caps on the power steering pump and the fuel tank. The vent is
located considerably above the design oil level in the case. If there were
not a vent the expansion of the oil as it warms would push it past even perfect
seals and surfaces. Conversely, a clogged vent will cause exactly that to
happen.
If the seals
and/or sealing surfaces for the Torque Converter are worn they will allow the
fluid to return to the case and it will drain from the vent and somewhere on the
upper case will be wet with fluid which eventually finds it way to your
floor.
The cure is
obviously good seals, non grooved sealing surfaces, and over boring and re
bushing the pivot points which requires tear down and machining. That may
include the converter. On Thu, Dec 22, 2016 at 2:03 PM, 'Rich Barber' c300@xxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Marshall
Larson __._,_.___ Posted by: <dverity@xxxxxxxxxxx> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to https://groups.yahoo.com/neo/groups/all/manage/edit For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang __,_._,___ |
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