Trans cooler installation.
Hi all, I wanted to be proactive to see if I could keep my automatic tranny alive for the long haul. I have a 27 ft Chateau sport with the 4R100 trans. I am the second owner and decided to bite the...
Forum Discussion
TNRIVERSIDE wrote:
If your additional cooler is in series with your factory cooler it should not let the trans run too cool. The factory trans coolers have a thermostat to not allow the fluid to circulate through the cooler until the trans gets to the operating temp. It will then open and close to regulate the trans fluid at the correct temp.
The 4R100 does not have a thermostatic bypass (the 5R110 does). It only has a pressure bypass to protect against a plugged cooler. It can bypass in extreme cold from the higher viscosity, but regulating temperature is not its purpose.
