4L60E Trans Temps while Towing

[NathanS]

I have an 07 Tahoe 5.3L AFM/DOD deleted with stage 2 TS cam. Circle D 2600 300mm converter. I installed an aftermarket cooler and when towing my camper I'm still getting temps close to 210. If I were to bypass the factory cooler in the radiator would it help keep the temps down.

 

[swathdiver]

I have an 07 Tahoe 5.3L AFM/DOD deleted with stage 2 TS cam. Circle D 2600 300mm converter. I installed an aftermarket cooler and when towing my camper I'm still getting temps close to 210. If I were to bypass the factory cooler in the radiator would it help keep the temps down.

Maybe, tell us how the external is plumbed with the one in the radiator.

 

[NathanS]

factory hose still goes into the top of the radiator, the bottom hose has been cut and its ran into the aftermarket cooler and out back to the trans

 

[NathanS]

aftermarket cooler

 

[NathanS]

I was just thinking if you have 210 degree water flowing through the radiator then how much could it really cool the trans fluid.

 

[intheburbs]

These trucks are designed to have operating transmission temperatures around 190°-200°.

Seeing 210° while towing is no issue at all.

 

[NathanS]

If it consistently sits b/w 200-210 while towing a 5500lb trailer can’t be good. And if it gets to 210 or higher I’d like it to be able to cool quicker.

 

[swathdiver]

factory hose still goes into the top of the radiator, the bottom hose has been cut and its ran into the aftermarket cooler and out back to the trans

That's what I thought. Fluid goes from the transmission into the bottom of the radiator and out the top then into the external cooler and back to the transmission.

Your setup is going from the transmission to the external cooler and then through the radiator and back to the transmission defeating the purpose of the external cooler.

Normal operating temperature is 180-200 degrees. The warnings and CELs don't happen until temperatures exceed 260 degrees.

 

[intheburbs]

If it consistently sits b/w 200-210 while towing a 5500lb trailer can’t be good. And if it gets to 210 or higher I’d like it to be able to cool quicker.

Again, you're only slightly elevated over normal design parameters Don't worry about it. Dex6 is pretty impressive stuff.

Here is when you should start getting concerned (for the record, I wasn't)

 

[NathanS]

That's what I thought. Fluid goes from the transmission into the bottom of the radiator and out the top then into the external cooler and back to the transmission.

Your setup is going from the transmission to the external cooler and then through the radiator and back to the transmission defeating the purpose of the external cooler.

Normal operating temperature is 180-200 degrees. The warnings and CELs don't happen until temperatures exceed 260 degrees.

I had originally thought about that but wasn't for sure so i just went with it. I'll switch it around and see of that helps. Thanks

My other issue is its crazy loud. 1 3/4 longtube headers and cat-less y pipe into 18" magna flow muffler. I need to figure out how to quieten it down. I thought about adding in a short resonator before the muffler.