Engine temps.

[06KingRanch]

Originally Posted by JackandJanet

Wow! You WERE running hot. The transmission fluid temp was causing fairly rapid breakdown of the fluid. Good call putting in the new cooler. Did you have any kind of a transmission cooler before?

Also, you were only 8 degrees below the Failsafe Mode temperature on your CHT. This may relate to your recent post in the other thread.

How much weight are you towing? What engine do you have and what is your gear ratio?

- Jack

Trailer is about 7000 lbs
5.4 with 3.73 rear end
It has the stock tow package, so yes it has the stock cooler. I hooked the Troyer into the return line, so i still have the stock cooler as well.
And yes i was hot...only did one trip and ordered and installed the Troyer and changed the eng, trans, rear diff, and washed out the rad....all good now

[408F150]

I've heard that running both coolers in series causes an unsafe drop in ATF pressure in an electronically controllers trans, can anyone else either confirm or deny this?