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Tranny over heating while towing

Grumpy Tooch

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LongrangeLauber Senior Enthusiast

LongrangeLauber

Posted
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so I've been driving around all day today without the tow and haul mode on and the transmission has stayed below 175... Who knew!

I'm still going to get the upgrade cooler but it's great to know that this works too

You drove without it on? Normally while towing, this will increase the trans. temp due to the lower shift points and having to go in and out of OD

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Grumpy Tooch Enthusiast

Grumpy Tooch

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well either earlier in this thread or in another thread I heard that taking it out of that mode will keep the temperature down.... And it did!

 

I know it was designed for that to be on while towing but I just kept it in 3rd when needed and then put it into drive when I need it over drive seem to work well my temperature stay down all day

LongrangeLauber Senior Enthusiast

LongrangeLauber

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As long as it works and keeps that temp. down that's all that matters. Now put an aftermarket cooler on there and you'll be golden. It's weird how one thing works for someone, but not for another on these trucks

Chris Senior Enthusiast

Chris

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BIG ASS COOLER!!!!! That's what you need

Grumpy Tooch Enthusiast

Grumpy Tooch

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As long as it works and keeps that temp. down that's all that matters. Now put an aftermarket cooler on there and you'll be golden. It's weird how one thing works for someone, but not for another on these trucks

Weird, I kno.. And today I drove around without the trailer today (I drive it hard) and Temp was up to 200! I don't know what to think.

 

Also, I already have a cooler but apparently it's not enough.

Grumpy Tooch Enthusiast

Grumpy Tooch

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Just got the 70266 today! I'm excited to do install on Saturday just need to get few fittings and I'm good

LongrangeLauber Senior Enthusiast

LongrangeLauber

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Just got the 70266 today! I'm excited to do install on Saturday just need to get few fittings and I'm good

Post your temperatures once you have a good feel for what it is. I want that same cooler because there is no rubber hose needed, hookup like stock.

 

Don't forget you will have to fab up a bracket or two. Might wanna do that ahead of time so you can paint it if you want

Grumpy Tooch Enthusiast

Grumpy Tooch

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I spent all day looking for these fittings and I can't find them can't install itI wasted a whole day I'm pissed

LongrangeLauber Senior Enthusiast

LongrangeLauber

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I spent all day looking for these fittings and I can't find them can't install itI wasted a whole day I'm pissed

I would just order them online to save time and frustration and then install it next wkd

Grumpy Tooch Enthusiast

Grumpy Tooch

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cant go another week with my temps over 200deg. its 90deg outside now.

and I don't know what I need. every fitting I was told does not fit. its not 3/8 npt from the cooler line its like in between?

Grumpy Tooch Enthusiast

Grumpy Tooch

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Yes, it will fit like a stock auxiliary cooler. If you get the reducers that chawkins6789 mentioned, and then hook up the quick disconnect fittings from the stock cooler onto those, and then it hooks up exactly like stock (just need to customize a few brackets to mount it). I wish I would have gone this route instead. Here's a link to someone who installed one on another forum:

 

http://www.performancetrucks.net/forums/gm-drivetrain-suspension-22/new-tranny-cooler-install-b-m-70266-a-467897/

 

Hopefully I don't get in trouble for posting a link to another forum...

what fitting did he use for this? I cannot get one that fits from new cooler to the stock lines. Do I have to remove the fitting on the stock line and replace it?

LongrangeLauber Senior Enthusiast

LongrangeLauber

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what fitting did he use for this? I cannot get one that fits from new cooler to the stock lines. Do I have to remove the fitting on the stock line and replace it?

You should probably take them off and wrap it in teflon tape to keep it sealed up in the future. There is a clip on the fitting that snaps out in order to pop the fitting off.

 

And on that thread I posted, he used 1/2" NPT to 3/8" NPT reducer (male to female). Not sure what you can't find one. Go to your local hardware store and go into the air compressor section. They should have a couple of those adapters

Grumpy Tooch Enthusiast

Grumpy Tooch

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You should probably take them off and wrap it in teflon tape to keep it sealed up in the future. There is a clip on the fitting that snaps out in order to pop the fitting off.

 

And on that thread I posted, he used 1/2" NPT to 3/8" NPT reducer (male to female). Not sure what you can't find one. Go to your local hardware store and go into the air compressor section. They should have a couple of those adapters

I still don't get it...I have that reducer but how do I connect it to the line? after I take off the fitting on the end of the line, how do I connect it to the reducer that I installed into the new cooler?

LongrangeLauber Senior Enthusiast

LongrangeLauber

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The connector on the line is a male. Your connector should be male into the cooler and female on the opposite end.

 

Is this going on a truck bigger than a 1500? I'm on mobile theme, so I can't see your signature

Grumpy Tooch Enthusiast

Grumpy Tooch

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It's a 2500HD. Don't know if that matters, but the 3/8 female does not accept the male fitting. It's smaller. It's like between 3/8 & 1/4 npt

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