Originally Posted by Speedjester
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.