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10-06-2019, 08:42 PM
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#1
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Member
Join Date: Mar 2010
Posts: 64
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Transmission in slow traffic
It was nearly 90 degrees when we got caught in a 2 hour traffic jam. On a bridge where we could not
Pull off. We were just moving a few feet every 10 minutes. Our transmission started to heat up it got as high as 205 degrees when we finally got out of the jam
How can I cool down the transmission in a case like this.
Bill
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10-06-2019, 09:17 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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Shift into neutral or park when stopped.
__________________
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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10-06-2019, 09:46 PM
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#3
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Senior Member
Join Date: Jul 2006
Location: Boise Valley (SW Idaho)
Posts: 2,018
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You don't say what year, make or model of coach you have, but our '06 Dynasty transmission NORMALLY runs right at 205 degrees. It always has. Our engine runs around 200, normally.
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Jim & Angie, Boise, ID
2021 Entegra Esteem 27U
2017 GMC Acadia Denali
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10-07-2019, 03:52 AM
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#4
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Trans temp is not a concern until it get to 250 degrees - then you need to cool it.
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10-07-2019, 06:02 AM
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#5
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Registered User
Monaco Owners Club
Join Date: Mar 2018
Location: Blairsville, GA & WPB, FL
Posts: 3,993
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Put it in neutral...the torque converter slipping longer than normal will heat the oil. Hopefully you know to put the brakes on. Recently caught in a fatal accident backup so shut the engine off and turned on the TV.
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10-07-2019, 11:16 AM
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#6
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,751
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Like others have already said, put trans in neutral every chance you get.
The worse is when traffic is just crawling along at walking speed, without ever coming to a complete stop. Mine has crept up to 225* in that situation.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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10-07-2019, 03:35 PM
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#7
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Senior Member
Texas Boomers Club Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,302
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good doc - https://www.rvtechlibrary.com/transm..._operators.pdf
page 24
CAUTION: Do not idle in D (Drive) or any forward range for more than five minutes. Extended idling in D (Drive) can cause transmission overheating and damage. Always select N (Neutral) whenever time at idle exceeds five minutes.
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2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
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10-07-2019, 03:42 PM
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#8
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Senior Member
Monaco Owners Club
Join Date: Nov 2015
Posts: 2,299
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Since your trans cooler is within the radiator your trans temp will or should remain close to your engine coolant temp. In that heat and stop and go traffic I imagine your coolant temp crept up to the approx the same temp. As mentioned, 205+ is not a worry for the trans. 250 is the ceiling.
__________________
Steven & Laurie
2006 Moncaco Executive Ranier
Detrioit Series 60 (515HP), Allison 4000 series
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10-07-2019, 10:46 PM
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#9
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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Quote:
Originally Posted by Chargerman
Since your trans cooler is within the radiator your trans temp will or should remain close to your engine coolant temp. In that heat and stop and go traffic I imagine your coolant temp crept up to the approx the same temp. As mentioned, 205+ is not a worry for the trans. 250 is the ceiling.
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I thought all DP's have a radiator "sandwich", which consists of coolant radiator, charge air cooler, Hydraulic oil radiator, transmission oil radiator(not connected to coolant radiator).
With gas engines in autos, the tranny oil does flow through the bottom coolant radiator tank. This is to heat the tranny oil quicker for better operation, or so i learned many decades ago in automotive school.
__________________
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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Linear Mode
