Silverado 4l60e temp

[robshu145]

2013 Silverado 4.8 4L60E here lately with the ambient temperature being about 87° my transmission has been running around 200 consistently that's after about an hour of driving I've been finding conflicting information on what is normal and what is not normal it does have the N radiator transmission cooler as soon as I start my truck the transmission starts heating up you go up a couple degrees about every 30 seconds until it hits 200 and then it seems to stabilize this is around town driving stop and go running about 35 miles an hour with a torque converter unlocked my torque converter doesn't seem to be slipping because I've been watching it on the live data and when the torque converter is locked the slip speed is zero I've recently done transmission filter and fluid and replace the radiator can anyone please tell me what I should start looking at it runs and shifts through every gears fine seems that way anyways any input would be appreciated

 

[eljefino]

My 08 ran cooler so you are on the right track trying to figure this out.
2wd/4.8/4L60E

 

[FastLane]

Mine is all over the place. Depends if AC is on or off. Highway driving vs city stop and go.
4L60E is decent transmission. You just have to service them often. 260,000 kms on mine and still shifts great.

 

[robshu145]

Mine is all over the place. Depends if AC is on or off. Highway driving vs city stop and go.
4L60E is decent transmission. You just have to service them often. 260,000 kms on mine and still shifts great.

Mine just hit 120k so who knows what going on one thing I crossed my mind is I just done the radiator and when I was refilling it I ran out of coolant and just added water and it never even crossed my mind having a in radiator transmission cooler if I have too much water in it it potentially make it run hot I may be wrong but it sounds kind of logical to me

 

[ctechbob]

Mine just hit 120k so who knows what going on one thing I crossed my mind is I just done the radiator and when I was refilling it I ran out of coolant and just added water and it never even crossed my mind having a in radiator transmission cooler if I have too much water in it it potentially make it run hot I may be wrong but it sounds kind of logical to me

More water/less coolant (within reason) usually cools better.

I ran 70/30 in my autocross car for that reason.

 

[wlk]

2013 Silverado 4.8 4L60E here lately with the ambient temperature being about 87° my transmission has been running around 200 consistently that's after about an hour of driving I've been finding conflicting information on what is normal and what is not normal it does have the N radiator transmission cooler as soon as I start my truck the transmission starts heating up you go up a couple degrees about every 30 seconds until it hits 200 and then it seems to stabilize this is around town driving stop and go running about 35 miles an hour with a torque converter unlocked my torque converter doesn't seem to be slipping because I've been watching it on the live data and when the torque converter is locked the slip speed is zero I've recently done transmission filter and fluid and replace the radiator can anyone please tell me what I should start looking at it runs and shifts through every gears fine seems that way anyways any input would be appreciated

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If it doesn't have an additional cooler I'd add one or larger one if it has a small factory one. I'd also run Lubegard Red in the fluid as well. After that maybe a 180° thermostat if you want but seems fine.

 

[robshu145]

I have put lube guard in it and only cooler it has is the one in the radiator

 

[wlk]

I have put lube guard in it and only cooler it has is the one in the radiator

I'd put an aftermarket cooler on it then and see what it does.

 

[FTTSHO]

My 2001 Blazer with the 4l60e runs about 195F when fully up-to operating temp. I’ve checked the temp through a scan tool live data. My trucks cooling system runs about 198F when fully warmed up, because I have a Hayden severe duty fan clutch, but if it had a normal duty fan clutch it should really run at 210, which actually will probably increase the trans fluid temp above 200F. So that’s one good thing about having a severe duty clutch, it really hits your mpg hard, but it keeps things cooler at least lol.

Just make sure you change the trans fluid at least every 30,000 miles. I plan on sucking out the fluid in the pan through the dipstick tube about every 6 months. That should exchange about 5 quarts, so half of the transmission fluid will get changed every 6 months. And I’ll drop the pan and change the filter every 3-4years.

also make sure your cooling system is clean and free of any sludge or buildup (which is a pretty common issue with Dexcool), especially inside the radiator, so as much heat transfer can happen in the radiator where the trans fluid flows through. Just make sure the inside of the radiator is silver (bare aluminum) in color, not coated with any brown stuff.

And use Dexron VI fluid. I use Valvoline Maxlife ATF or their Dex/Merc LV atf. Shifts like butter and does not ever go above 195F, at least for me with a severe duty fan clutch.

 

[robshu145]

My 2001 Blazer with the 4l60e runs about 195F when fully up-to operating temp. I’ve checked the temp through a scan tool live data. My trucks cooling system runs about 198F when fully warmed up, because I have a Hayden severe duty fan clutch, but if it had a normal duty fan clutch it should really run at 210, which actually will probably increase the trans fluid temp above 200F. So that’s one good thing about having a severe duty clutch, it really hits your mpg hard, but it keeps things cooler at least lol.

Just make sure you change the trans fluid at least every 30,000 miles. I plan on sucking out the fluid in the pan through the dipstick tube about every 6 months. That should exchange about 5 quarts, so half of the transmission fluid will get changed every 6 months. And I’ll drop the pan and change the filter every 3-4years.

also make sure your cooling system is clean and free of any sludge or buildup (which is a pretty common issue with Dexcool), especially inside the radiator, so as much heat transfer can happen in the radiator where the trans fluid flows through. Just make sure the inside of the radiator is silver (bare aluminum) in color, not coated with any brown stuff.

And use Dexron VI fluid. I use Valvoline Maxlife ATF or their Dex/Merc LV atf. Shifts like butter and does not ever go above 195F, at least for me with a severe duty fan clutch.

Ok ty I appreciate it has a brand new radiator in it and I did have a moto rad thermostat in it and I wound up switching it back out with my old one and it seemed to help a little bit so I guess we'll see it's running at about 195 when it was running at 210 Fahrenheit

 

[meep]

considering that it’s getting it’s cooling by hot coolant, as the temps heat up AND as you run the AC, the coolant temp will quickly approach 170-180-190 - which doesn’t give much of a differential to radiate the transmission heat from the little tube in the radiator into the surrounding coolant.

And it’s probably not a problem. It can take some time - 45 minutes or so, but if the AC is running I think most ATs will reach those temps inside an hour if not before. Turn the A/C off and it may stay from 125-160, until it gets into the 90s outside.

Dexron VI is good stuff. I wouldn’t sweat it unless towing heavy. And if towing heavy, remember to lock it out of OD, as that generates a lot of internal heat as well, surprisingly so.