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Tranny over heating while towing

Grumpy Tooch

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Grumpy Tooch Enthusiast

Grumpy Tooch

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post-79082-0-80497600-1370399904_thumb.jpg

 

finally got it..

 

the two brackets on the top I found in the garage and they fit perfectly! bottom two I fabed from stick of aluminum.

post-79082-0-80497600-1370399904_thumb.jpg

post-79082-0-80497600-1370399904_thumb.jpg

post-79082-0-80497600-1370399904_thumb.jpg

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CKNSLS Enthusiast

CKNSLS

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I just had to pull over because it went to 225 too much traffic.

 

I hear a lot about amsoil too. I put all purple in engine, both difs. But it was getting to expensive so i just put mobil synthetic

 

 

The new Dexron fluid starts to degrade at 270 degrees. At 225 your still OK. OR, if your DIC gives you a message that your tranny fluid is too hot..

LongrangeLauber Senior Enthusiast

LongrangeLauber

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I put a Derale pan on mine and it holds a couple more quarts, so far my trans has not gone over 175 in my unloaded stop in go Wash DC traffic. When I am just rolling along it stays around 150.

Oh gosh don't mention DC traffic. I go up there frequently for work, and I hate trying to make it in and out of that hellhole. Luckily, I get up there most times at 530 am so it isn't too bad, but on the way back to work can be a b!tch

Grumpy Tooch Enthusiast

Grumpy Tooch

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Very nice and clean. Good work

thank you actually enjoy working on my truck

Grumpy Tooch Enthusiast

Grumpy Tooch

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The new Dexron fluid starts to degrade at 270 degrees. At 225 your still OK. OR, if your DIC gives you a message that your tranny fluid is too hot..

is it synthetic? and is it available at autozone?

LongrangeLauber Senior Enthusiast

LongrangeLauber

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thank you actually enjoy working on my truck

 

So do I, until you reach the point where your working on it too much... Haha

CKNSLS Enthusiast

CKNSLS

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is it synthetic? and is it available at autozone?

GM has never stated it is a full sythetic. Many belieive it's blend. I don't know what it is. I do not know if it is available at Autozone. All I know is there is a lot of misinformation about "how hot is too hot". GM states it can take higher temps than what others think is too hot on this thread-that's all I am saying.

LongrangeLauber Senior Enthusiast

LongrangeLauber

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I just don't like my trans. temps. getting much higher than 200, especially when I don't see it start to drop

Grumpy Tooch Enthusiast

Grumpy Tooch

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GM has never stated it is a full sythetic. Many belieive it's blend. I don't know what it is. I do not know if it is available at Autozone. All I know is there is a lot of misinformation about "how hot is too hot". GM states it can take higher temps than what others think is too hot on this thread-that's all I am saying.

yeah I hear you well in the book it says it should be between 180 and 200 and I'm going with that but mine stays around 190 if I'm cruising with the trailer which is fine but if I'm in traffic it does go up to almost to 220 which worries me

where can I get that fluid you're talking about then

 

 

I just don't like my trans. temps. getting much higher than 200, especially when I don't see it start to drop

I agree

ATMINF Enthusiast

ATMINF

Posted
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Yup the DC traffic is horrible, and it is compounded by the fact that there are a large amount of drivers that are plane rude. It has taken me up to 2hrs to go 11 miles! Normally the drive is between 45-60mins. I can't wait to move! I will say people do have a tendency to think twice before they get a taste of the Chevys "chrome horn"!

Grumpy Tooch Enthusiast

Grumpy Tooch

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Yup the DC traffic is horrible, and it is compounded by the fact that there are a large amount of drivers that are plane rude. It has taken me up to 2hrs to go 11 miles! Normally the drive is between 45-60mins. I can't wait to move! I will say people do have a tendency to think twice before they get a taste of the Chevys "chrome horn"!

 

...lol..I say that about NY!

music Senior Enthusiast

music

Posted
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This is a long thread, but I tried to read it all. I'm really not sure what the original question was, but I'm towing a 7k lb (loaded) camper with a completely stock trans cooler setup, with no issues. I've towed in some crazy conditions, and topped 10k ft at one point in WY.

 

The size of the cooler is not the only parameter GM considers when designing the system. Thermodynamics must consider the whole system, since heat dissipated by one component negatively affects the next one in line. You may cool the trans fluid, but then pass warmer air through the radiator and over the motor. In all of my towing, my only concern came in the 110f heat of TX, and it wasn't the trans fluid that I was watching. I'm sure that gm considered these wildly varying conditions when sizing the stock coolers, since my own experience has seen excursions on both systems.

LongrangeLauber Senior Enthusiast

LongrangeLauber

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Well if GM actually routed the lines like they were supposed to be, it would actually keep all the temps. down. I'm pretty sure on my truck it goes to aux. cooler first, when it should be radiator. If it goes to radiator first, you will actually have cooler air coming from the auxiliary cooler over the radiator and motor.

 

And it is a very long topic. I think on my computer its like 13 or 15 pages haha

Grumpy Tooch Enthusiast

Grumpy Tooch

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It is a long topic if you guys got a little off topic talking about the AN fittings and some line, but all in all it's all been useful information

 

that being said one of the reasons for the coolers not sufficient is because I also have a mild left with larger tires on top of that I'm pulling a trailer 5000 to 6000 pounds for GM might of got it right but not considering what I've done the modifications to the truck

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