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Old 06-14-2017, 08:18 AM   #1
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Allison transmission 3000 temperature range

I have a 2005 Fleetwood Revolution LE Cat C9 with a side radiator on a Spartan Mountain Master chassis and wondered what temperature range I should be seeing as I go down the road. I have a gauge on the dash which reads between 1/2 and 2/3 and a Scangauge D which reads up to 211 usually. I have seen it hit 215 once on a hot day coming down a long hill with the exhaust brake on.

We have put 45000 miles on this coach in the last 3 1/2 years so it must be okay but just asking what others see... Engine temps run consistently from 202-206
Revolution LE 38X C9 Cat
2020 Jeep Gladiator Toad
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Old 06-14-2017, 10:26 AM   #2
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Location: Powell River, B.C.
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A lot of the transmission to engine temp correlation, depends on the trans cooler type and location.
My Freightliner chassis , uses only a trans fluid to engine coolant , heat ex-changer in the lower rad hose , so the trans temp is consistently cooler than engine temp , because the cooled water from the rad , cools the trans fluid , before it goes back to the motor. So knowing your trans cooler type and location is important to figuring the temp range that would be normal for your rig.

Some where I have info on , trans temp , that would be considered detrimental to the trans fluid and internal components , as soon as I find it , I'll re-post.
JMHO: 215 degrees is not a problem. But I'll confirm.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 06-14-2017, 10:34 AM   #3
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On our recent 4000 mile trip out west. My transmission (Allison 3000 MH) temps were in the 188-210 range. Majority of time around 190 only going up on long climbs.
These temps closely matched the engine temps.
2002 Newmar Mountain Aire 4095
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