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Old 06-01-2015, 09:33 PM   #1
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Safe temps?

Well took the new to me rig(2004 Mountain Aire, spartan chassis ISL 400) home today.. 156miles... 92* ambient temp...highway cruising at 60-65 ...189* - 193* water temp and Allison Trans temp 192-203* ...

Are theses number good.. What would be considered hot for the isl 400 and Allison Trans ?.

Any info would be appreciated..Thank you
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Old 06-01-2015, 09:36 PM   #2
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Safe temps?

Those are about the same numbers my 02 MADP (same ISL400 on a Spartan)runs at. Temps will increase slightly on long grades or trans temp may increase in heavy traffic and lots of stop and go.
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Old 06-01-2015, 10:31 PM   #3
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Quote:
Originally Posted by Speedjester View Post
Well took the new to me rig(2004 Mountain Aire, spartan chassis ISL 400) home today.. 156miles... 92* ambient temp...highway cruising at 60-65 ...189* - 193* water temp and Allison Trans temp 192-203* ...

Are theses number good.. What would be considered hot for the isl 400 and Allison Trans ?.

Any info would be appreciated..Thank you
Let me toss this out...

With the dash AC ON...Water 185,
With the dash AC OFF...water 200

In both cases tranny runs about 2*-4* warmer and if it very warm temps the water temp get up to 202*.

Why is that? Well, I found that out last week at my annual service at Spartan. Spartan stacks the dash AC cooler with the engine radiator, tranny cooler & CAC. Other chassis will give the AC its own fan. So...when you run the dash AC you force the radiator fan to spin faster.

Try it with MAX AC and then try it with normal AC. With the MAX you should see a steady, cooler temp while with normal AC there is some cycling. Turn the AC on and off and you should see temps change accordingly.
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Old 06-01-2015, 10:41 PM   #4
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Your numbers are about NORMAL, no need to worry.
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Old 06-02-2015, 08:01 AM   #5
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...189* - 193* water temp and Allison Trans temp 192-203* ...

Are theses number good.. What would be considered hot for the isl 400 and Allison Trans ?.

Any info would be appreciated..Thank you
Yes those are good temps.. I have seen my little car (new radiator) hit 208 coolant (Assume trans close since same radiator cools both) and over 220 shortly after shutoff. You are well within safety range.
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Old 06-04-2015, 10:01 AM   #6
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My 2012 Ventana 4324 with 380hp runs in those ranges.
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