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Old 05-29-2018, 05:34 PM   #17441
ktllc15
 
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How hot is your tranny getting? On a longer 6-7% grade mine will run 150-175° and my coolers bypassed.
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Old 05-29-2018, 06:08 PM   #17442
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Truckers, lets see your rigs!

Quote:
Originally Posted by Signature600 View Post
Your truck must be a freak...1194hp, doesn't get hot and no transmission cooler at 100K lbs??

Sounds like I just need to send this one to you to sprinkle some magic on it. Either that or you can just take the gauge out of it....I'm betting you don't run a gauge on transmission temperature.

Chris


Dad’s truck had the water cooler when it was a 10spd, swapped in the 13spd and put an air cooler on it. Cooler started leaking so I looped the hoses and it made zero difference in temp between all 3 setups. So when I swapped my engines I ordered the $10 block off plate and threw the “cooler” on the scrap pile.


Since the harness I used was for a Pete glider I never got around to moving the gauge wires. They’re virtual gauges on the nav screen. However there are 2-3 other setups identical to mine and they don’t have temp issues so until it starts puking oil out of the seals......

Friend had 9 coal trucks in eastern KY for years and said 90% had the lines looped. So if they can load 50 ton in a bucket and roll through the mountains, mine should live an easy life.
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Flipping your mirrors up when you don't tow? That serves no purpose other than to let me know that you are a douche, from a distance.

Last edited by jfaulkner; 05-29-2018 at 06:10 PM.
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Old 05-29-2018, 06:33 PM   #17443
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Quote:
Originally Posted by ktllc15 View Post
How hot is your tranny getting? On a longer 6-7% grade mine will run 150-175° and my coolers bypassed.
Watch sayin "hot tranny" around faulkner. He gets excited for reasons you might not intend
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Old 05-29-2018, 06:47 PM   #17444
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Quote:
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Either way, in my searching for solutions to my "problem" I found this...

Problems

It seems our boy allan5oh has not always been as smart as he seems now...

Chris
Eh what's the problem? The genius that hooked it up put both coolant tubes to the high pressure side. It was doing nothing!

Put an air cooler on my headache rack and haven't seen anywhere near 200 since. Thats with the new spec Eaton oil which is thinner than previous. But I also cruise in direct now which makes a huge difference.
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Old 05-29-2018, 07:10 PM   #17445
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Eh what's the problem? The genius that hooked it up put both coolant tubes to the high pressure side. It was doing nothing!

Put an air cooler on my headache rack and haven't seen anywhere near 200 since. Thats with the new spec Eaton oil which is thinner than previous. But I also cruise in direct now which makes a huge difference.


And your making the same power as a stock C16 and hauling 1/2 a load. Completely shocked yours isn’t getting hot.
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Flipping your mirrors up when you don't tow? That serves no purpose other than to let me know that you are a douche, from a distance.
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Old 05-29-2018, 07:49 PM   #17446
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And your making the same power as a stock C16 and hauling 1/2 a load. Completely shocked yours isn’t getting hot.
Well it was in Montana at elevation and 105+ degrees with a sidewind. Usually when you get into the elevation it cools right off but I doubt you easterners know that.
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Old 05-29-2018, 08:28 PM   #17447
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Well it was in Montana at elevation and 105+ degrees with a sidewind. Usually when you get into the elevation it cools right off but I doubt you easterners know that.


At 105* your trans is considered “normal” at 100-120* over ambient air temp which would be 205-225. Eaton considers 250-300 hot and even then they consider it acceptable for short term use.

Trans temp is like intake air and water temp. Everyone picks a random number out of thin air and considers it the “max”
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Old 05-29-2018, 08:42 PM   #17448
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It was around 260 IIRC and I could hear chattering. But those conditions were the worst I have ever seen.
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Old 05-29-2018, 09:19 PM   #17449
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They say conventional oil starts breaking down at what 230-250°? Something like that anyways, so I usually use that as my reference. If the oils still able to lubricate it's not too hot. Oh and I run west too and even at 80k pounds and it 90+ degrees outside I've never had mine go above 175 on a longer pull and I have no cooler. I never did understand how using hot water was supposed to cool it.
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Old 05-30-2018, 06:32 AM   #17450
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Liquid exchanger is to help get to target temp. If the trans is cold, get to operating temp, if it's hot, shed heat to the cooling system.

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Old 05-30-2018, 07:45 AM   #17451
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Quote:
Originally Posted by ktllc15 View Post
How hot is your tranny getting? On a longer 6-7% grade mine will run 150-175° and my coolers bypassed.
240-250* on the gauge in 90* temperatures

Quote:
Originally Posted by jfaulkner View Post
Dad’s truck had the water cooler when it was a 10spd, swapped in the 13spd and put an air cooler on it. Cooler started leaking so I looped the hoses and it made zero difference in temp between all 3 setups. So when I swapped my engines I ordered the $10 block off plate and threw the “cooler” on the scrap pile.


Since the harness I used was for a Pete glider I never got around to moving the gauge wires. They’re virtual gauges on the nav screen. However there are 2-3 other setups identical to mine and they don’t have temp issues so until it starts puking oil out of the seals......

Friend had 9 coal trucks in eastern KY for years and said 90% had the lines looped. So if they can load 50 ton in a bucket and roll through the mountains, mine should live an easy life.

I figured you'd tell me something like that...problem is my driver has a gauge and won't let me take it out now, so I'll have to get more cooler in it. I have asked him 5 times what happens if he backs down a gear and rolls on with no response.

Chris
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Old 05-30-2018, 08:02 AM   #17452
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240-250* on the gauge in 90* temperatures




I figured you'd tell me something like that...problem is my driver has a gauge and won't let me take it out now, so I'll have to get more cooler in it. I have asked him 5 times what happens if he backs down a gear and rolls on with no response.

Chris
Shifting is hard
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Old 05-30-2018, 08:18 AM   #17453
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Quote:
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Shifting is hard
Ya God forbid you miss a gear and have to drop two! I've seen guys slow down to 20ish miles an hour at the bottom of the grape vine in Cali just so they don't have to down shift going up....

I wonder how much of a difference in temp would input shaft speed make when under sustained heavy load? Could you're high temps possibly be related to the driver lugging it down too much before dropping a gear? I wouldn't think it'd matter since either way the gearbox is under load but that's starting to get into things that are above my pay grade.
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Old 05-30-2018, 08:54 AM   #17454
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Quote:
Originally Posted by Signature600 View Post
240-250* on the gauge in 90* temperatures









I figured you'd tell me something like that...problem is my driver has a gauge and won't let me take it out now, so I'll have to get more cooler in it. I have asked him 5 times what happens if he backs down a gear and rolls on with no response.



Chris


From the coal haulers, he said if the cooler isn’t mounted in the grill of the truck don’t waste your time. There isn’t enough air flow under the truck on a hard slow pull to make any difference. We used to mount them under the truck on these gliders and have since just used the bypass plates with the same results.
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Flipping your mirrors up when you don't tow? That serves no purpose other than to let me know that you are a douche, from a distance.
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Old 05-30-2018, 09:30 AM   #17455
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The heavy haul truck I still work on added a liquid to air with an electric fan between the posts of the rack and claim not to have been past 200 since.
They threw a fit when the truck was new because it got hot pulling the hill at e-town on I65.

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Old 05-30-2018, 09:38 AM   #17456
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Quote:
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Shifting is hard
Running in direct makes a huge difference. Too bad most drivers think 12th and 17th is direct.
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Old 05-30-2018, 09:41 AM   #17457
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I've heard of guys doing some special coating (not microblue FFS) on all the gears and such. One guy has never seen above 130f without a cooler. He runs thinner oil too.
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Old 05-30-2018, 09:45 AM   #17458
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Quote:
Originally Posted by jfaulkner View Post
From the coal haulers, he said if the cooler isn’t mounted in the grill of the truck don’t waste your time. There isn’t enough air flow under the truck on a hard slow pull to make any difference. We used to mount them under the truck on these gliders and have since just used the bypass plates with the same results.
I can believe that. I've seen a couple transmissions lost due to air coolers being underneath. To me that's barely better than a water to oil cooler on top of the tranny. The kind with the shifter. No the other kind. You're a sick ****.

Ive heard heavy haulers - the REAL heavy kind - put them on the headache rack with a big fan or like you said in the grill. Nothing else works.
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Old 05-30-2018, 09:55 AM   #17459
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Quote:
Originally Posted by jfaulkner View Post
From the coal haulers, he said if the cooler isn’t mounted in the grill of the truck don’t waste your time. There isn’t enough air flow under the truck on a hard slow pull to make any difference. We used to mount them under the truck on these gliders and have since just used the bypass plates with the same results.
Copy that. I think we're talking 45mph or so, but I'll see how much room I have in the grill. That new big fan pulling air through it would be the best thing.

Thanks for all the advice guys. I'm sure we're not causing any major damage to the transmission, just my brain.

Chris
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Old 05-30-2018, 11:45 AM   #17460
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I used to pull a quad axle dump bucket with 39 ton plus in it thru the Adirondacks with the regular old barrel cooler. I didnt have the power allen has but I never saw much more then 10-15 degrees difference from coolant.
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