I am in So Cal where most of the time it's mid 70's and for a few months in the summer it's warmer. I think the lower t-stat helps. The easiest way to make a transmission last longer is to keep the fluid cooler. As far as winter, where I live it does not get colder than 35-40 degrees F. I have had no problems.

 

If you're worried about the transmission, why not got a tranny cooler...

 

get a tru cool 40k for ur tranny cooler it helps alot.

 

Cooler motor = Cooler IAT's (more power), less prone to knock retard, and cooler tranny since the tranny lines flow through the radiator... Maybe not something you will feel on the butt dyno but every little bit helps.

I had the lingenfelter 160* stat in my 07' Denali, It only starts to open @ 160* (I boiled in a pot with a thermometer) She would run 179-180* on the Hwy and 185-187* in stop and go traffic. Stock stat would get up to 210* in stop and go traffic and run 197ish on the hwy...

Some food for thought... http://www.carnut.com/ramblin/cool3.html

 

Well ****, I may have to look into getting this now lol. Problem is trying to get my computer retuned by justin but he is so damn busy right now.


does anybody know of a trans cooler that will bolt up in the stock trans coolers location and use the same lines? Or will I have to re do everything?

 

The thermostat alone is not going to help anything. Lower coolant temperatures does not = lower iat. The lower thermostat setting will keep the cylinders cooler discurraging pre detonation and allowing you to run more timing advance. In an untuned truck, it may actually hurt mileage because you may not be getting complete combustion due to the cooler cylinder temperatures.
Put the 160* t stat in, and you'll be safer running a more agressive tune.

 

Hmm…I thought engine temp effects under hood temp which effect IAT’s as well???

 

i'ma just get a tranny cooler 40K and call it a day

 

It really depends. I wouldn't think that 190 deg engine temps vs 200 deg engine temps would really cause the engine bay temp to fluctuate that much, and that is negligible when you're driving anyways.

 

Yes and no. With an open element filter you're pulling air from the engine bay. With a well designed CAI system, or the stock air box, you're pulling air from the inner fender or somewhere other than the hot air in the engine bay.

Besides that, the coolant temperature should not really affect the cumbustion/exhaust temperatures. The heat from the actual block and the heat coming off the manifolds/headers is not going to really be affected by using a thermostat that opens 15-30* cooler