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Old 04-28-2009, 05:40 PM   #1
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TONY R.'s Avatar
Newmar Owners Club
Join Date: Mar 2009
Posts: 16
Thumbs up Transmission fluid leak

To those who have read the many welcomes from various members, my reply also included a question on a trans. fluid leak. This info might be helpful to other members. I traced the fluid leak to a metal tube coming into the trans. Didn't know whether in was from the cooling line, fill line, or what. Turns out it was the dip stick tube. There is a gromet(plastic or rubber) that fits on the trans. that the metal dip stick tube goes into. The gromet must have been nicked when the tube was originally inserted & that is what was causing the fluid leak. Also, it would only leak when the engine was off & the fluid would rise to that level. Hopes this info helps someone down the road.

TONY & Kay R.
2008 Newmar Ventana DP 39'6"
Toad: 2007 Hummer H3x
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Old 04-29-2009, 01:59 AM   #2
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Join Date: Jul 2005
Location: East Alabama
Posts: 25
You are lucky. That was an easy fix. When I saw this thread I had pictures in my mind of the whole tranny coming down for the front seal replacement.

2009 Palamino Puma 25RS
1996 Dodge 3500 Cummins
Once retired and back to work.
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Old 03-30-2016, 05:33 AM   #3
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Tiffin Owners Club
Join Date: Jun 2015
Posts: 129
Hi folks ,

I know this. Is an old thread but I cannot seem to start a new one so hopefully someone can help here... I am try to find a parts breakdown of an Allison mh3000 transmission tail shaft. Specifically the yoke seals .. I know their is a shaft seal and an o-ring on the retainer bolt but their doesn't seem to be any seal on the washer under that yoke retainer bolt that I can see. I am trying to re install a drive shaft and transmission yoke and want to make sure I get all the seals right .


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Cummins /Allison 10 KW gen,
Demsco SS dolly
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