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Old 02-04-2011, 10:37 AM   #1
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Silverleaf Transmission Temp "message"

Driving east on I-10 near Deming, NM, with reasonably normal conditions, suddenly the Silverleaf announces with a message "Transmission temperature 199". While I've not monitored the transmission temp regularly, it seems to me that's generally about where I've seen it with the Silverleaf in the "scan" mode. My first assumption was that "199" must be too hot, but I see others with temps in that range or more. I checked the Silverleaf for "faults", but it doesn't show up as a "fault". Yet I assume there must be some reason the "199" was suddenly highlighted (I was not pushing buttons -- it just showed up. Wondering if anyone else might have experienced that issue and determined what the message means...

I've checked the forum and don't see a similar issue reported here.

Tom
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Old 02-04-2011, 01:34 PM   #2
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RVersOnline,

According to the Allison 3000 MH & 4000 MH Owners Manual,

"The transmission is considered to be overheated when any of the following
temperatures are exceeded:

Sump fluid 121C (250F)
Fluid to cooler 149C (300F)
Retarder out fluid 165C (330F)

If the sump fluid temperature reaches 128C (262F) the ECU will inhibit operation
in the higher ranges."

Clearly 199 F is below those ranges.

See this link for the Owners Manual:
http://www.allisontransmission.com/d...t/OM3349EN.pdf
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Old 02-04-2011, 01:58 PM   #3
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If the outside temps are at 60 or less. My VMSpc won't hardly get up to the 140 too do a fluid check from the pad.
At 60-75 it will show around 156 Once into the 80-90 it will hit 175-190

With the highs at Deming only getting to 34 today. Your 199 would be impossible for mine to get that high, unless maybe it was pulling a 10 mile long 6-10% climb.

I would be checking the fluid level and why the radiator temps wasn't showing high. Radiator by VMS should have been in the high 200-210 range. That is what cools the transmission fluid.
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Old 02-04-2011, 03:07 PM   #4
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Triker56,

RVersOnline has an Alpine Coach with a Cummins ISL diesel engine and an Allison 3000 MH series transmission. For an Alpine Coach, the Allison 3000 MH series transmission has an upper temperature range well above 200 degrees F.

In one of the Alpine Coach rallies in Hilton Head, SC, the Allison Transmission tech rep told the Alpine Coach owners in a Gearhead session that the 3000 MH transmission temperature could easily get up to 240 degrees F in hot weather when sitting stopped for awhile in heavy traffic with the transmission in Drive. He told all of us to simply shift the transmission into Neutral periodically under those conditions to cool the transmission. I have encountered those conditions, and the Allison recommendation works with no problems and no alarms for an Alpine Coach.
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Old 02-04-2011, 03:17 PM   #5
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I recommend calling Silverleaf at (888) 741-0259 to get advice on the Silverleaf message. They have been very helpful when I've called them. See this link for their web site:

VMS 440 CL | SilverLeaf Electronics, Inc.
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Old 02-04-2011, 03:30 PM   #6
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Pretty normal for the ISL/MD 3060 combo, and about where mine runs +or_ 10 degrees.
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Old 02-04-2011, 04:03 PM   #7
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Dale777,

I also have a 3060 Allison transmission and was giving temps I have seen in the last 7 plus years on my VMSpc.

And I still think if it is 34 outside, he should not be seeing 199 fluid temps.
Although that temp will not damage his transmission or his ISL diesel engine.

I know nothing about a ISL engine. So if it has a 210 thermostat in it. That may explain the 199

OP said he was driving and didn't say he was sitting and not moving in HOT Weather.
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Old 02-04-2011, 10:01 PM   #8
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Most ISL's have a 180 thermostat. It depends on what kind of trans cooler you have to see trans temps. Air cooled in 34 will probably be pretty cool. Water cooled will run pretty close or just above engine temps. Uphill around Deming with a clean radiator close to 200 engine temps would be expected with trans temps again depending on the type of cooler.
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