Speedsmith
15+ Year Contributor
- 31
- 9
- Jul 1, 2010
-
Gregory,
Michigan
I have a question about the effectiveness of the transmission fluid cooler thermostats. The Perma Cool, Derale... etc type that go between the transmission fluid cooler output and input ports to either the stock or an aftermarket cooler. Seems they allow 10% flow thru the cooler until the opening temperature is reached ( 160F), then 100%. I realize the question cannot be answered unless the variables of the application it's to be used in are defined, so;
1997 AWD Eagle Talon, 417 AWHP
Stock Auto Trans with exception of shift kit
Daily driver, until it snows (Michigan car), so that puts it in an ambient temp range of 30 – 100 Deg. F.
Petroleum based fluid (not synthetic)
Not raced, occasional "spirited" driving
I think I could answer the question if I knew a constant to add to the ambient temperature that was considered normal.
Example: Ambient = 80F, + constant = Normal operating Temperature?.
Reason for the question is I've read normal trans fluid temps range from 90 -150 F. , these cooler thermostats open at 160 F. essentially blocking the flow of the fluid to the cooler until it's opening temperature, if it was normal to run less than 160F the thermostat would unnecessarily raise the temp of the fluid by eliminating the cooler. If the normal operating temperature were greater than 160F I'd think it may be beneficial in my application to help warm the trans fluid faster on cooler days. Looking at these thermostats I could modify the opening temp from 160 by shimming the spring to raise it or taking turns off to lower it.
Appreciate any information.
1997 AWD Eagle Talon, 417 AWHP
Stock Auto Trans with exception of shift kit
Daily driver, until it snows (Michigan car), so that puts it in an ambient temp range of 30 – 100 Deg. F.
Petroleum based fluid (not synthetic)
Not raced, occasional "spirited" driving
I think I could answer the question if I knew a constant to add to the ambient temperature that was considered normal.
Example: Ambient = 80F, + constant = Normal operating Temperature?.
Reason for the question is I've read normal trans fluid temps range from 90 -150 F. , these cooler thermostats open at 160 F. essentially blocking the flow of the fluid to the cooler until it's opening temperature, if it was normal to run less than 160F the thermostat would unnecessarily raise the temp of the fluid by eliminating the cooler. If the normal operating temperature were greater than 160F I'd think it may be beneficial in my application to help warm the trans fluid faster on cooler days. Looking at these thermostats I could modify the opening temp from 160 by shimming the spring to raise it or taking turns off to lower it.
Appreciate any information.
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