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12-03-2021, 05:53 PM
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#41
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Senior Member
Join Date: May 2016
Location: Yellowknife
Posts: 1,162
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Ever get an oil analysis done?
Sticky that's good reading:
https://www.forestriverforums.com/fo...hart-3427.html
__________________
2007 Rockwood 2701SS
2017 Ram 2500 Granite Crystal SAP Laramie 6.7L
2014 Triumph Bonneville. NH Togas, tuned
1953 GMC 9314
1982 GoldWing Interstate
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12-03-2021, 06:29 PM
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#42
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Senior Member
Join Date: Jun 2017
Posts: 297
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Quote:
Originally Posted by Lins
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I will after the holidays..
Yeah Im aware of those threads..
Yes I tow tow haul mode.. Keeps the TC locked when it can, and I tow in 6th.. direct 1:1. No overdrive needed for me. Cause even though it may stay in 7th gear if you went that route hit a small hill and it comes out of TC lock up. subtle but temps clime.
6th all day
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2020 Ram 1500 classic 5.7l hemi 3:21 rear 8 speed
2019 Palimino XLE 24 RD
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12-04-2021, 05:56 AM
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#43
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Senior Member
Join Date: Aug 2017
Location: Saint Paul, MN
Posts: 1,276
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Quote:
Originally Posted by 1100mike
I live in a place where we experience winter for several months. Before I bypassed the trans thermostat I drove it for a couple years. Often my transmission would go for a month or more in frigid temps and never get up to the 172 degree temp that opened the Tstat for the cooler. So, was I damaging my transmission in those short, cold weather, drives? I just turned 100k on my Ram. Changed the fluid twice. It's a popular modification on the Ram forum for the heavy duty trucks. Have yet to see a negative review or failure because of it..
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What transmission in the Ram HD are you talking about? Based on my trucks temps I don't understand why anyone with a HD truck and ZF 8 speed would do this 'popular mod'.
My Ram trans temp gets up to 167 in 95 ambient pulling the boat or empty and doesn't move for hours...so if the cooling plumbing to the trans is ran through the motor's radiator it clearly regulates flow to get the temp up to 167ish and then the coolant is rerouted to the dedicated trans cooler.
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24 Ram 3500 CC/SRW/LB/50 gal tank/CTD
2024 XLR 31A LE
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12-04-2021, 07:14 AM
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#44
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Senior Member
Join Date: Mar 2021
Posts: 434
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Quote:
Originally Posted by BigH
What transmission in the Ram HD are you talking about? Based on my trucks temps I don't understand why anyone with a HD truck and ZF 8 speed would do this 'popular mod'.
My Ram trans temp gets up to 167 in 95 ambient pulling the boat or empty and doesn't move for hours...so if the cooling plumbing to the trans is ran through the motor's radiator it clearly regulates flow to get the temp up to 167ish and then the coolant is rerouted to the dedicated trans cooler.
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I've got the older 6 speed. 4th generation 2016. I don't know anything about the 5th generation trucks. I've seen 190 degree temps before I did the bypass, pulling my 34 ft TT..
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12-04-2021, 01:28 PM
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#45
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Senior Member
Join Date: Nov 2017
Posts: 1,756
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Quote:
Originally Posted by 1100mike
I live in a place where we experience winter for several months. Before I bypassed the trans thermostat I drove it for a couple years. Often my transmission would go for a month or more in frigid temps and never get up to the 172 degree temp that opened the Tstat for the cooler. So, was I damaging my transmission in those short, cold weather, drives? I just turned 100k on my Ram. Changed the fluid twice. It's a popular modification on the Ram forum for the heavy duty trucks. Have yet to see a negative review or failure because of it..
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Read post 22. Thats a start.
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12-04-2021, 09:44 PM
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#46
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Senior Member
Join Date: Mar 2021
Posts: 434
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I searched for cases of transmission failures due to low fluid temperatures. Other then one mechanic's opinion posted here, I couldn't find much. I'll keep running "not approved" Redline transmission fluid, at lower then OEM approved temperatures, and work on the second 100,000 miles on my transmission..
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12-04-2021, 09:53 PM
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#47
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Senior Member
Join Date: Nov 2017
Posts: 1,756
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Do you think everyone belongs to forums? Let us know what you are accomplishing when you find out.
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12-04-2021, 10:19 PM
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#48
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Senior Member
Join Date: Mar 2021
Posts: 434
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Quote:
Originally Posted by aircommuter
Do you think everyone belongs to forums? Let us know what you are accomplishing when you find out.
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Condescend much? Have a nice day..
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12-04-2021, 11:28 PM
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#49
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Senior Member
Join Date: Nov 2017
Posts: 1,756
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Some people come here for help, some come here to help, some come here to disbelieve and live in denial.
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12-06-2021, 01:15 PM
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#50
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Senior Member
Join Date: Sep 2020
Posts: 305
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I’m assuming you have a 2020 Ram Classic with the 8HP70?
My 8HP75 stays around 168-172 F even when towing 8k lbs
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12-06-2021, 05:19 PM
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#51
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Senior Member
Join Date: Jun 2017
Posts: 297
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Quote:
Originally Posted by IvoryHemi
I’m assuming you have a 2020 Ram Classic with the 8HP70?
My 8HP75 stays around 168-172 F even when towing 8k lbs
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yup. Thats what I got.
My temps are 180-190 plus not towing in winter
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2020 Ram 1500 classic 5.7l hemi 3:21 rear 8 speed
2019 Palimino XLE 24 RD
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01-13-2022, 11:21 PM
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#52
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Member
Join Date: Jun 2014
Posts: 42
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You cant fix stupid, lets just leave it at that. Those of you that think you know better than the maufacturers and modify your trucks to lower the temps, are just that. Do what you must, but there is a reason they run high temps. Remember they have to warranty the transmission you do not. Now the egg is on you.
"Stupid is Stupid Does"
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01-13-2022, 11:45 PM
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#53
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Senior Member
Join Date: Jun 2017
Posts: 297
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Quote:
Originally Posted by Skidooman
You cant fix stupid, lets just leave it at that. Those of you that think you know better than the maufacturers and modify your trucks to lower the temps, are just that. Do what you must, but there is a reason they run high temps. Remember they have to warranty the transmission you do not. Now the egg is on you.
"Stupid is Stupid Does"
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Kind of a flame post eh? We know the reason they run high temps. So whats your point of your post?
As said this tranny fluid has a flat viscosity curve. Dont shift any different cold or hot.
I prefer my tranny temp in the 160 area. Is that ok with you?
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2020 Ram 1500 classic 5.7l hemi 3:21 rear 8 speed
2019 Palimino XLE 24 RD
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01-14-2022, 06:01 AM
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#54
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Senior Member
Join Date: Feb 2020
Posts: 178
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Quote:
Originally Posted by Skidooman
You cant fix stupid, lets just leave it at that. Those of you that think you know better than the maufacturers and modify your trucks to lower the temps, are just that. Do what you must, but there is a reason they run high temps. Remember they have to warranty the transmission you do not. Now the egg is on you.
"Stupid is Stupid Does"
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This is predominantly true, however on late model GM trucks they do sell a modified temperature thermostat easily installed which has a lower operating temperature. Not a modification but a GM redesign lets say.
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01-14-2022, 11:01 AM
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#55
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Senior Member
Join Date: Nov 2020
Location: SE Wisconsin
Posts: 495
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Quote:
Originally Posted by JCR
This is predominantly true, however on late model GM trucks they do sell a modified temperature thermostat easily installed which has a lower operating temperature. Not a modification but a GM redesign lets say.
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Yes they do. I posted details about it in post #36 in this thread. An OEM replacement that GM designed to deal with the known problem of transmission temperatures running too high. I recently changed out mine and it took all of 10 mins to do. It definitely runs at a lower temp now. Instead of the trans thermostat fully opening at 190⁰, it fully opens up at 158⁰.
__________________
2021 Wildwood FSX 190RT Toyhauler
2016 Chevrolet Silverado LT 1500 Crew Cab 5.3l 6L80 3.42 4x4
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01-14-2022, 11:22 AM
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#56
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Senior Member
Join Date: Jul 2017
Posts: 4,056
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The 1500 silverado is a different beast then the 2500/3500 which do not have thermostats and have from factory large transmission coolers . mine not towing rarely goes over 149 . towing around 160 to 175 . up and over passes it has reached 208 for extremely short periods. Installed a new transmission pan from PML with drain plug stock size so fluid can be changed easy .
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01-14-2022, 11:32 AM
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#57
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Senior Member
Join Date: Nov 2020
Location: SE Wisconsin
Posts: 495
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Quote:
Originally Posted by MR.M
The 1500 silverado is a different beast then the 2500/3500 which do not have thermostats and have from factory large transmission coolers . mine not towing rarely goes over 149 . towing around 160 to 175 . up and over passes it has reached 208 for extremely short periods. Installed a new transmission pan from PML with drain plug stock size so fluid can be changed easy .
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True about 1500's. But the interesting thing is older 1500's using same transmission didn't have the thermostat and had tremendously less issues. Some "engineer" concluded that thermostats were necessary and then they appeared. Now they have finally figured out that the "engineer"designed thermostats have been causing nothing but problems and costing them a lot of money in replacements so they redesigned them at a lower temperature.
__________________
2021 Wildwood FSX 190RT Toyhauler
2016 Chevrolet Silverado LT 1500 Crew Cab 5.3l 6L80 3.42 4x4
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01-14-2022, 12:12 PM
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#58
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Senior Member
Join Date: Nov 2017
Posts: 1,756
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Learn about oil flow and eddy currents with close tolerances.
https://youtu.be/9rEGIB2F8qA
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01-14-2022, 12:20 PM
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#59
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Senior Member
Join Date: Jul 2017
Posts: 4,056
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Quote:
Originally Posted by mikeyk101
True about 1500's. But the interesting thing is older 1500's using same transmission didn't have the thermostat and had tremendously less issues. Some "engineer" concluded that thermostats were necessary and then they appeared. Now they have finally figured out that the "engineer"designed thermostats have been causing nothing but problems and costing them a lot of money in replacements so they redesigned them at a lower temperature.
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Makes sense . Heat seems to always be a problem starter with transmissions. The cooler the better Engine operating temps are different .
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01-14-2022, 12:33 PM
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#60
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Senior Member
Join Date: Jul 2017
Posts: 4,056
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Quote:
Originally Posted by aircommuter
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Interesting video and amsoil sales pitch . but at $15 a quart I'll stick with my Castrol edge full synthetic for $5. a quart . Last truck 225,000 and still going strong with the new owner . 43,000 on new truck and works well expect the same longevity. Oils have come a long way same with transmission fluids and amsoil does not provide much for the extra cost
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