codelld
Massillon, OH
Full Member
Joined: 10/10/2002
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Rad1,
I have owned a '02 and a '07 Endeavor. In both of the coaches
the transmission temperature gauge showed very little response.
I did some research and found that Monaco had installed a
transmission temperature sender with a range of 0 to 400
degrees. They used a VDO brand sender and I was able to locate a
VDO sender with a range of 0 to 250 degrees. My Alladin system
shows normal operating temperature to be less than 185 degrees.
Most references to max transmission temperature show over 250
degrees to be detrimental to fluid and transmission life.
I found the VDO Part# 323-095 sender at the following URL.
http://store.42draftdesigns.com/250F-Water-Temp-Sender-18-NPT_p_
90.html.
I installed the sender with the transmission cold and lost only
a few ounces of fluid during the sender exchange. The new sender
is slightly longer than the old one but has not made a
difference in my operating temperatures. The advantage of having
the gauge work properly is a quick glance provides quick
feedback of the temperature while the Alladin screen can be a
distraction to find the right information.
If you gauge just has C, hashmarks and H this sensor will give you the display you want. If you gauge is marked in degrees the result will be confusing.
Dennis Codella
'07 HR Endeavor 40PDQ
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Diplomat Don
Moorpark, Ca
Senior Member
Joined: 04/09/2005
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Good Sam RV Club Member
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I had read codelid's response before and did the same thing on my coach. I added the VDO part and found that it made my gauge read about 250 degrees. In order to make it work properly, I would need to add a resistor (mine was installed in the hose connection on the Allison). I decided that I didn't want to mess with it and really didn't like the length of the new probe. When mounted in the hose connection on my coach, I estimated that it blocked about 35%-50% of the fluid flow. I'm not an engineer and couldn't tell you if it mattered, but I didn't like it.
Don & Mary 
2005 Monaco Diplomat 36SKT
400 Cummins 
2010 Nissan Frontier CrewCab 4WD
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Crespro
SoCal
Senior Member
Joined: 07/23/2004
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My 2005 ISL with Allison 3000 will normally run at 140 degrees to 150 degrees on the regular gauge.
The VmSpc gauge shows about 170 degrees, so I assume it is located in a different position on the transmission.
Both are fine. If I am in the mountains in the summer, the VmSpc may approach 190 degrees.
Transynd on an Allison 3000 is predicted to run cooler.
The only time I had a heating problem was in a traffic jam. I discovered that the transmission temp rose over 220 degrees if I remained in drive (internal friction). If I shifted into neutral when stopped, it was fine.
Crespro 2005 Diplomat 40 PAQ/2008 Saturn Vue XR AWD
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