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Transmission Temps

V8nuts

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V8nuts Enthusiast

V8nuts

Posted
Posted

Well yesterday was the first time towing my 5100lb trailer with my 07 Silverado that is only rated for 4600lbs. My tranny temps got to 208 at 65mph and 205@70 do I need a cooler ? My rear gear is a 3.27

grayghost7 Enthusiast

grayghost7

Posted
Posted
Well yesterday was the first time towing my 5100lb trailer with my 07 Silverado that is only rated for 4600lbs. My tranny temps got to 208 at 65mph and 205@70 do I need a cooler ? My rear gear is a 3.27

 

I would add one for sure. this is one thing I do know about these new trucks. Mine has a small cooler on the front, but I want to double it's size. A cool tranny is a happy tranny and it will reduce wear and tear.

txab Senior Enthusiast

txab

Posted
Posted
Well yesterday was the first time towing my 5100lb trailer with my 07 Silverado that is only rated for 4600lbs. My tranny temps got to 208 at 65mph and 205@70 do I need a cooler ? My rear gear is a 3.27

 

I would add one for sure. this is one thing I do know about these new trucks. Mine has a small cooler on the front, but I want to double it's size. A cool tranny is a happy tranny and it will reduce wear and tear.

 

 

A big +1.

 

A Hayden 679 model will be plenty.

WaterGuy Enthusiast

WaterGuy

Posted
Posted
What trans temps are you seeing now?

 

Is the fan on all the time?

 

I picked up an ignition "run" signal and that triggers a relay which sends power to the fan. The fan came with a t'stat. It is NOT plumbed with the radiator.

 

According to my ScanGauge the fan comes on at about 165* and off at about 145*.

 

Before:

As temps go, it would be equal to or up to 15* greater than the water temp. If water was 200* then trans could be high as 215*. I've hit 220* on the trans. But, generally it was 195-200. This in various conditions. 95* days and local stop-n-go traffic or open interstate or interstate stop-n-go.

 

After:

Generally hovers around 165*. Some conditions I've seen 185* and 190* but not stay there.

 

The 4L60E reads the temp right after the converter which is the hottest part of the fluid flow.

cujo8 Enthusiast

cujo8

Posted
Posted

What do you folks use to measure your transmission temperature? Have any recommendations for a particular gauge setup and where did you mount the gauge? Thanks.

V8nuts Enthusiast

V8nuts

Posted
  • Author
Posted
What do you folks use to measure your transmission temperature? Have any recommendations for a particular gauge setup and where did you mount the gauge? Thanks.

 

 

mine came with the truck stock I just hit the display buttons till it displays on the instrument panel and watch it as I tow.

Pilot12 Enthusiast

Pilot12

Posted
Posted

According to my ScanGauge the fan comes on at about 165* and off at about 145*.

 

Before:

As temps go, it would be equal to or up to 15* greater than the water temp. If water was 200* then trans could be high as 215*. I've hit 220* on the trans. But, generally it was 195-200. This in various conditions. 95* days and local stop-n-go traffic or open interstate or interstate stop-n-go.

 

After:

Generally hovers around 165*. Some conditions I've seen 185* and 190* but not stay there.

 

The 4L60E reads the temp right after the converter which is the hottest part of the fluid flow.

 

 

What about this; I have HD trailer package and factory tranny cooler. (5.3L 4sp W/T STD bed 4x4). Only plan on occasional towing of light trailer or boat. I'm getting tranny temps upwards of 190* without a trailer. Phoenix has been hot, but that's just tooling down the freeway at 65mph. Does that seem too hot?

WaterGuy Enthusiast

WaterGuy

Posted
Posted

If I didn't have my scangauge I would never know my temps would hit 220* so I would never have been worried.

 

Knocking at 210* is one thing but staying there .... I would worry.

 

190* is OK.

For your towing events ... just monitor.

If more frequent, then start looking at upgrades.

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