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05-21-2022, 06:36 PM
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#1
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Senior Member
Newmar Owners Club
Join Date: Aug 2015
Location: Greensboro, Ga.
Posts: 443
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Transmission running Temperature
Picked up our new 2022 Newmar London Aire.
First long run was today.
The transmission temperature hovered around 200 degrees.
Pretty flat terrain and was running 65-70 mph
Is that a normal temperature?
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Dave H
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05-21-2022, 06:44 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 30,786
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You would have to know your transmission fluid cooler setup .
Most trans fluid coolers would be in the tank of the radiator , so trans temperatures would mirror engine temps .
What were engine temps at the time ?
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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05-21-2022, 06:47 PM
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#3
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,295
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Yes Dave, your temperature is normal .....
__________________
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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05-21-2022, 09:10 PM
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#4
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Oct 2017
Posts: 1,778
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Dave,
I believe my trans is the same as yours. 200 is slightly on the high end for me but would not concern me. On flat ground my trans temperature runs in the 180’s. But that might vary a little with external air temperature.
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 Hal and Pam
2022 Entegra Cornerstone W
2020 Ford Edge ST
Sold 2017 Entegra Cornerstone B
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05-22-2022, 08:04 PM
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#5
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Senior Member
Join Date: May 2018
Posts: 823
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Your temperature is pretty normal, much depends on outside temperature. We run anywhere from 190 to 220’s on our 2022 LA
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John, Sharon & (Luna)-Blk.Tri.Australian Sheppard
2022 Newmar LA 4551, 2019 DS4018 Sold
21' Tahoe Z71, Demco base, Avail bar, Air Force 1.
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05-24-2022, 05:29 PM
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#6
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Senior Member
Join Date: Jun 2021
Posts: 321
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Normal, fan kicks on at 205. I too was surprised at my temp, called Spartan and had it all checked out. Perfectly normal. I range between 180 and 210.
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JD and Kathy, Cooper the golden doodle, Scottsdale AZ
2019 New Aire 33452021 London Aire 4579 2023 Newell #1746
Toad: 21 Ford Bronco - Blue OX and Airforce One
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05-26-2022, 05:14 AM
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#7
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 29,882
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Just for comparison; My Allison was running about 200° (slightly higher on long grades) before I replaced the filters and fluid, now the temperature stays between 180° and 190° all the time.
An Allison transmission in an RV is considered light/medium-duty operation.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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05-26-2022, 06:19 AM
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#8
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,295
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Quote:
Originally Posted by Ray,IN
Just for comparison; My Allison was running about 200° (slightly higher on long grades) before I replaced the filters and fluid, now the temperature stays between 180° and 190° all the time.
An Allison transmission in an RV is considered light/medium-duty operation.
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Its the difference in the year's Ray, Today's motor's on everything run a whole lot hotter cause of emission's, thus the tranny temps will be hotter.
20 years ago, all motor's ran a lot cooler........
__________________
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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05-26-2022, 10:17 AM
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#9
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Senior Member
Join Date: Mar 2019
Posts: 1,750
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Quote:
Originally Posted by Ray,IN
Just for comparison; My Allison was running about 200° (slightly higher on long grades) before I replaced the filters and fluid, now the temperature stays between 180° and 190° all the time.
An Allison transmission in an RV is considered light/medium-duty operation.
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I also noticed that my M3000 runs a little cooler after switching to Transynd 668 and new filters.
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