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04-01-2013, 10:59 AM
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#21
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Senior Member
Join Date: Dec 2012
Location: Michigan
Posts: 1,440
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Quote:
Originally Posted by f1100turbo
Doesn't the Allison/gm go into limp mode and de-fuel when trans overheat occurs?
The 08 duramax for sure has the cooler mounted underneath the truck and just ahead of fuel tank..
I wonder how optimal that is ?
I've been looking for a small shrouded fan to mount on it but its a pretty small cooler@ 8-1/2 by 10-1/2.
Turbs
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that is a fuel cooler, not trans.. my engine code is not reliant on this cooler but the LLY is because your FICM is cooled with fuel, no fan is required on any trucks at this cooler
__________________
2012 Wildcat 344QB
06 LBZ ,CC 4x
lots of mods
Superglide
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04-01-2013, 11:15 AM
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#22
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by jevanb
that is a fuel cooler, not trans.. my engine code is not reliant on this cooler but the LLY is because your FICM is cooled with fuel, no fan is required on any trucks at this cooler
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My bad your right.
I thought I traced the lines.
6 two many buds I guess.
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04-01-2013, 09:20 PM
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#23
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Junior Member
Join Date: Mar 2013
Posts: 14
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Good info!
Quote:
Originally Posted by Hipshot
Thanks Lou. I asked my dealer service department what the max temp was when I bought the truck and they did not know. They "thought" 220 was max. I did not know until your post that the DIC gives an alarm at 250. That is good to know. On our trip to Big Bend last spring I had a long climb into a strong headwind. The trans temp got to 216 and worried the heck out of me. Knowledge is good, thanks again.
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I am glad to learn this as well. While pulling my 25ULA behind my (now replaced) RAM 1500 HEMI I had trans temps get above 210 on a couple of occasions and it concerned me. On one trip through west Texas, on a long grade it got to 217 and I too was sure I had done damage - now I know while it wasn't good, no significant damage was probably done.
Transmission concern was one of the reasons I upgraded to 3/4 ton CTD.
Good info all around.
__________________
2012 RAM CCSRW CTD
2010 W&P 25 ULA
2012 JEEP Unlimited
1971 LeMans Sprint Convertible
2010 ZG1400 Concours
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05-05-2013, 03:25 PM
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#24
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Member
Join Date: Apr 2013
Location: Northwest FL
Posts: 59
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I recently bought a 2008 Surveyor SV-291 that I'm towing with my 2006 Yukon XL.
This truck is (from an power train perspective) a Chevy 1500. 5.3l V8 flex fuel with a 4l65e Transmission.
I added a 40k GVW transmission cooler and a ScanGauge II to monitor the transmission temps. Prior to the cooler I sat around 176F, after the transcooler the truck barely gets over 125F while pulling. It gets up to about 190 (highest I've seen it go) when the truck is idling for 10+ mins. This is a result of the fluid being warmed up as it passes through the radiator by the engine coolant.
The faster you go the lower the temps it seems, even when pulling up grades the temp does not climb hardly at all. I'm very happy with the unit, it replaced the factory tow package cooler, and will hopefully provide a longer life for my 4l65e.
I also put some lucas oil severe gear 85w140 in the rear diff, and replaced my track bar bushings and the truck tows beautifully when the Reese hitch and 1200lb bars. I'm really impressed. I was very afraid that I was going to end up wanting to buy a heavier duty truck because I would be "white knuckle" driving with a 1/2 ton
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05-05-2013, 03:27 PM
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#25
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Moderator Emeritus
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 3,365
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Good work!
__________________
2021 F350 Lariat 7.3 4X4 w 4.30s, 2018 Wildcat 29RLX
2012 BMW G650GS, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
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01-04-2015, 12:58 AM
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#26
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Senior Member
Join Date: May 2013
Posts: 599
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Quote:
Originally Posted by blackseven
I recently bought a 2008 Surveyor SV-291 that I'm towing with my 2006 Yukon XL.
This truck is (from an power train perspective) a Chevy 1500. 5.3l V8 flex fuel with a 4l65e Transmission.
I added a 40k GVW transmission cooler and a ScanGauge II to monitor the transmission temps. Prior to the cooler I sat around 176F, after the transcooler the truck barely gets over 125F while pulling. It gets up to about 190 (highest I've seen it go) when the truck is idling for 10+ mins. This is a result of the fluid being warmed up as it passes through the radiator by the engine coolant.
The faster you go the lower the temps it seems, even when pulling up grades the temp does not climb hardly at all. I'm very happy with the unit, it replaced the factory tow package cooler, and will hopefully provide a longer life for my 4l65e.
I also put some lucas oil severe gear 85w140 in the rear diff, and replaced my track bar bushings and the truck tows beautifully when the Reese hitch and 1200lb bars. I'm really impressed. I was very afraid that I was going to end up wanting to buy a heavier duty truck because I would be "white knuckle" driving with a 1/2 ton
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Blackseven: does your truck have the same interior as a chevy pickup truck??????
Nevermind, just noticed its a 2006
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01-04-2015, 05:24 PM
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#27
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Senior Member
Join Date: Jul 2010
Location: Wauseon, Ohio
Posts: 249
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Has anyone else noticed that the manufacturers are running higher temps in the new transmissions? The six speed in my 2015 Silverado runs 195 to 200 degrees wether I am towing or not, no matter the outside air temperature (it just takes longer to reach 200 in the winter). The only logical explanation I have heard is that the warmer fluid flows easier increasing the efficiency of the converter and the gear train as well.
__________________
2011 Rockwood 2901SS Ultra Lite
2014 Chevy Silverado Z71---Hensley Arrow Hitch
my other toy---1969 Camaro 396 SS
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01-05-2015, 09:16 PM
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#28
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Senior Member
Join Date: Oct 2014
Posts: 231
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That's about what my 2010 ran when daily driving - I added an additional cooler and now it is around 170 although that fluctuates more depending on ambient air temp.
__________________
2008 FR Salem 26TBUD
2010 FR R-Pod 171 (2009-2015)
2010 Chevy Suburban
Honda EU3000is inverter-generator
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01-07-2015, 03:59 AM
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#29
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Senior Member
Join Date: Nov 2014
Posts: 140
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Turbs, that cooler is for diesel fuel. For the return. To cool down the fuel going into the fuel tank. It's not a transmission cooler. Jfyi.
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01-07-2015, 09:34 AM
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#30
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Infractee
Join Date: Aug 2010
Posts: 796
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Quote:
Originally Posted by hoffkm
Has anyone else noticed that the manufacturers are running higher temps in the new transmissions? The six speed in my 2015 Silverado runs 195 to 200 degrees wether I am towing or not, no matter the outside air temperature (it just takes longer to reach 200 in the winter). The only logical explanation I have heard is that the warmer fluid flows easier increasing the efficiency of the converter and the gear train as well.
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The newer transmissions are thermostat controlled, you could have a cooler the size of the bed in my truck and it will still be 195F loaded or not.
I guess, according to that chart, my trans will only be good for 85K miles??
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01-07-2015, 03:35 PM
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#31
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Senior Member
Join Date: Oct 2014
Posts: 231
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Quote:
Originally Posted by RhoZeta
The newer transmissions are thermostat controlled, you could have a cooler the size of the bed in my truck and it will still be 195F loaded or not.
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How do you explain the noticeable drop in my tranny temps after adding an additional cooler? It is the newer 6L80 used in the Caddy/Chevy/GMC truck lines.
__________________
2008 FR Salem 26TBUD
2010 FR R-Pod 171 (2009-2015)
2010 Chevy Suburban
Honda EU3000is inverter-generator
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01-07-2015, 03:41 PM
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#32
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Infractee
Join Date: Aug 2010
Posts: 796
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Quote:
Originally Posted by techntrek
How do you explain the noticeable drop in my tranny temps after adding an additional cooler? It is the newer 6L80 used in the Caddy/Chevy/GMC truck lines.
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Sorry bubba! I did not notice until just now that this was about Chevy, I am a Ford guy, I know nuttin about Chebby, please disregard.
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01-08-2015, 01:29 PM
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#33
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Senior Member
Join Date: Oct 2014
Posts: 231
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It would be odd if Ford now regulates the minimum tranny temps. All the research I did before I added my additional cooler says that you can't cool a tranny too much. The lower you go, the longer it lasts.
With the bitter cold now in place I kept an eye on my temps yesterday and today. At highway speeds it hovered around 100 F once it was fully warmed up, plus or minus a few degrees. It slowly warmed while stopped. I wish I could maintain that temperature going up a steep slog!
__________________
2008 FR Salem 26TBUD
2010 FR R-Pod 171 (2009-2015)
2010 Chevy Suburban
Honda EU3000is inverter-generator
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01-08-2015, 01:42 PM
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#34
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Senior Member
Join Date: Mar 2013
Location: Richmond, KY
Posts: 207
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Just to add another point of view, I have a 2014 1500 silverado v6 long bed. My tt is a same year canyon cat 17qbc. TT weighs in at about 4000-4500 loaded. I watch my trans temp and the highest it has ever gotten is 207%. That was in very slow almost stop and go traffic for about 45 minutes. It normally runs about 198 or so when towning level or to speed.
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01-08-2015, 03:47 PM
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#35
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Infractee
Join Date: Aug 2010
Posts: 796
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Quote:
Originally Posted by techntrek
It would be odd if Ford now regulates the minimum tranny temps. All the research I did before I added my additional cooler says that you can't cool a tranny too much. The lower you go, the longer it lasts.
With the bitter cold now in place I kept an eye on my temps yesterday and today. At highway speeds it hovered around 100 F once it was fully warmed up, plus or minus a few degrees. It slowly warmed while stopped. I wish I could maintain that temperature going up a steep slog!
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Well, they are not regulating a minimum temp, it is not like they add a heater to the cooling circuit, the tranny will do it, even if it takes a while in very cold temps. The thermostat in the Ford 6 speed torqeshift does not even send fluid to the cooler until it reaches 190F. It also will not go into 6th if the temp is too low, viscosity rules inside a hydraulically actuated machine that is a transmission. I would imagine GM also uses some sort of thermostat as well. I am sure dodge uses duct tape and popsicle sticks...
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01-08-2015, 10:24 PM
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#36
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Senior Member
Join Date: Oct 2014
Posts: 231
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Quote:
Originally Posted by RhoZeta
Well, they are not regulating a minimum temp, ...The thermostat in the Ford 6 speed torqeshift does not even send fluid to the cooler until it reaches 190F.
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That's what regulating the minimum temperature means. Without a thermostat the minimum temp will go lower as the ambient temp drops. With the thermostat the fluid is retained until it gets up to 190.
__________________
2008 FR Salem 26TBUD
2010 FR R-Pod 171 (2009-2015)
2010 Chevy Suburban
Honda EU3000is inverter-generator
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01-08-2015, 10:42 PM
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#37
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Infractee
Join Date: Aug 2010
Posts: 796
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I think we are at two different angles on the same problem...
Have a good one!
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04-03-2015, 01:16 AM
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#38
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Junior Member
Join Date: Apr 2015
Posts: 4
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If your truck is a Chevy the DIC information center will tell you if you have exceeded maximum transmission temp.
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04-03-2015, 07:40 AM
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#39
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by chetbear81
If your truck is a Chevy the DIC information center will tell you if you have exceeded maximum transmission temp.
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Might even go into limp mode.
TURBS
08 duramax tuned n modded, 32bhok Sabre
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04-03-2015, 07:43 AM
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#40
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by RhoZeta
I would imagine GM also uses some sort of thermostat as well. I am sure dodge uses duct tape and popsicle sticks...
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Now that's funny! [emoji12]
TURBS
08 duramax tuned n modded, 32bhok Sabre
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