Trans Temp increase during stop n go

[Mescareno]

2012 GMC Sierra 1500 4.8L v8 with the 4L60 transmission that has an external cooler from the factory installed.

 

I have noticed that when in park or in line of fast food/traffic jams that my transmission temp goes between 205-225. When my truck gets moving again the temps go down. I was thinking about getting a bigger after market external trans cooler or adding an electric fan to the external cooler. I do not want to burn up my trans from temps going up and down. Thoughts???

[CamGTP]

Get a larger cooler or add the fan. Either one would help lower the temps some.

Those temps aren't in the danger zone either, it's well within the range of operation and the fluid can more than handle that temp for a while.

[Grumpy Bear]

1 hour ago, CamGTP said:

Get a larger cooler or add the fan. Either one would help lower the temps some.

Those temps aren't in the danger zone either, it's well within the range of operation and the fluid can more than handle that temp for a while.

                                    ^^^^^

[Mescareno]

2012 GMC Sierra 1500 SL 4.8L v8 4L60 with external trans cooler radiator from factory

 

Usually my truck stays somewhere between 145-170 for normal running temps. However, during the stop n go traffic, drive thru, etc. my transmission will reach temps of 205-215. I did a tranny flush and changed the filter. Did not see or smell burnt fluid or any major metal pieces in the fluid or filter. Any ideas what I could do to keep the temps during when in these situations? Should I get a bigger external radiator or a bigger radiator with a fan?

[Grumpy Bear]

Not abnormal. There is little air movement at low speeds. You can add a second cooler with it's own fan. Derale remote comes to mind. Perhaps something from this list? 

 

https://derale.com/product-footer/fluid-coolers/transmission/remote-mount2013-10-28-09-53-271226240719

[CamGTP]

 

 

Don't forget about your other thread with the same question.

[Grumpy Bear]

1 minute ago, CamGTP said:

Don't forget about your other thread with the same question.

 

How on earth did I miss that?  Maybe he didn't like the SAME answer in that thread, eh? 

[txab]

Threads merged

[redvett]

Torque converters generate heat and while standing still or moving slowly until the lockup clutch engages you will see that its normal, if your not towing dont worry about it.