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Trans thermostat

Tie

By Tie
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Tie Enthusiast

Tie

Posted
Posted

Hey All, 

  I have a question. I want to remove my trans line thermostat. Will it be bad for the trans like running too cold I live in NJ. Why GM have a 190 degree thermostat is it for better performance. Is too cool an problem. I know too hot is but how bout. 

silveradosid Senior Enthusiast

silveradosid

Posted
Posted

it is been stated many times, until 2014 every gm truck ran without the thermostat with no problems. i live in canada and removed mine, dont notice any difference in how the transmission works

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Tie Enthusiast

Tie

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Great thanks. How many miles is there truck. How did you take out yours did you just remove it and the spring. I know where is Spring and the thermostat is like a housing will the oil still slow even out or is a baffle before its flow in and out. 

Tie Enthusiast

Tie

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20 minutes ago, silveradosid said:

lots of videos out there to watch, i just flipped the inside parts. i have 130k miles on my truck

Wow great. I'll trting thanks. 

Tie Enthusiast

Tie

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Hi Siveradosid,

   I flipped the thermostat in my transmission line. Like you did in NJ its 40 degrees I drove my truck and the trans temperature is not passing 110 degrees. How about yours? what temperature ?is your running at. 

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
1 hour ago, Tie said:

It's 110 too cool for the transmission. 

Until 2014 coolers on GM automatics were not regulated. That is no thermostat. The 6L80 was run from 2005 to 2013 without a whimper without a thermostat. No, that is not to cool. 

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CamGTP Senior Enthusiast

CamGTP

Posted
Posted

The other day I took a 65 mile trip to a place and it was 12-14 degrees outside, transmission got to 104-109 degrees. Pretty much what my 2012 truck got to in the cold weather +/- 10 degrees.

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flyingfool Senior Enthusiast

flyingfool

Posted
Posted (edited)

if you did the bypass mod, you can bring the temps up about 10-20 degrees by installing a full flow spin on filter without the anti drainback spin on oil filter. this puts pressure on the cooling line and and holds back the trans fluid from flowing freely thru the cooler.  i found a standard spin on filter with the anti drain back valve causes restriction and will increase the trans temp to the same level as the thermostat before deleting it.

 

I now got rid of my old spin on set up and went with a motorguard cartridge style (toilet paper roll) design, more surface area and no restrictions with drain back valves, also dialed down the trans fans to 190 degrees operation , before they never turned on until 220 degrees.

20210110_112727.jpg

Edited by flyingfool
Tie Enthusiast

Tie

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2 hours ago, silveradosid said:

the temps here in ontario have been 20 to 30 degrees and my tranny runs at 104, in the summer when it was 80 degrees it ran 160

Great thanks! 

That info looks like the same way I think my will run in the summer too. And you didn't experience no hard shifting or lagin to change the gear from the transmission.

And how long ago you did the trans delete? 

Tie Enthusiast

Tie

Posted
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10 hours ago, flyingfool said:

if you did the bypass mod, you can bring the temps up about 10-20 degrees by installing a full flow spin on filter without the anti drainback spin on oil filter. this puts pressure on the cooling line and and holds back the trans fluid from flowing freely thru the cooler.  i found a standard spin on filter with the anti drain back valve causes restriction and will increase the trans temp to the same level as the thermostat before deleting it.

 

I now got rid of my old spin on set up and went with a motorguard cartridge style (toilet paper roll) design, more surface area and no restrictions with drain back valves, also dialed down the trans fans to 190 degrees operation , before they never turned on until 220 degrees.

20210110_112727.jpg

Hi flying 

Can you send a link I can see parts or video installation to understand more. Thanks

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
3 hours ago, silveradosid said:

the temps here in ontario have been 20 to 30 degrees and my tranny runs at 104, in the summer when it was 80 degrees it ran 160

I live further south but run a colder water thermostat so about the same as yours. Chart in my previous post of three years.

18 minutes ago, Tie said:

Great thanks! 

That info looks like the same way I think my will run in the summer too. And you didn't experience no hard shifting or lagin to change the gear from the transmission.

And how long ago you did the trans delete? 

Been running delete for 4 years. Didn't plot this last year. Have my data.  Zero shift issues. Now at 135,000 miles (217,000 kilometers). I also run a PAO/POE based transmission fluid starting at 50K and do a drain and fill every 25K. Thing shifts mint.

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