Is running Trans temp between 105 and 115F OK?

[pjbrownva]

Here's my question,
after putting in an aux trans cooler, now that it is winter, my trans temp varies between 105 and 115F once the truck is warmed up and running (coolant temp about 180F).

Is this OK, or is it too cold? If it's not OK, will I damage anything?

I added the aux cooler in series with the factory cooler because I tow a boat and don't want to over heat my tranny.

I also have an Ultragauge Blue which lets me read out Tranny temp on my phone.

If the cold tranny temp is a problem, I can always put in a manual bypass valve so that I can bypass the extra cooler during the winter.

Advice and thoughts, please.

Thanks!

P.S. -- after adding the cooler, I added tranny fluid and did the whole heat up, let extra fluid drain, etc procedure to make sure that it was filled properly given the extra fluid that it can now hold because of my addition.

 

[07V8]

You're fine. Mine runs the same temps when its below 30 outside.

 

[pjbrownva]

You're fine. Mine runs the same temps when its below 30 outside.

Thanks for the info...

Anyone else have any insight? If that temp is too cool, I can put in a manual bypass valve, and leave the bypass on during the winter, except when I'm towing.

This will keep only the stock trans cooler, and bypass the auxilliary one that I added.
[MENTION=66389]BlackWorksInc[/MENTION] always seems to know *something* on these types of topics!

 

[CXS]

I did the same thing, added a second cooler since my tranny got pretty hot pulling my trailer. It doesn't result in the temp being too cold in the winter unless someone chimes in and proves otherwise.

 

[BlackWorksInc]

That sounds okay temperature wise. I'd have to check the FSM for sure. But off the top of my head it sounds right (fluid check temp is like 99~111*F if I remember correctly for this vehicle)