Tranny cooler
#13
JK Newbie
Join Date: Aug 2010
Location: Maob, UT (Full time RVer)
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A plate cooler is easy to install and will lower your trannie temp about 75 degrees. A hard pull up a grade in 1st or 2nd gear will raise the temp to over 300 deg. Get a plate cooler about 8" x 10" and install in front of the a/c- stock cooler. There are tabs on the frame over the rad. opening and a metal brace under it. Mount the cooler, connecters down about 3/8 inch from a/c cond. so the fan will pull air through it. Cut the curve and damping hose out of the line returning to the trannie and run Transmission Grade Hose to the cooler. This must be used due to the high oil temps. The tranny has a thermostat that releases the oil to the cooler at 175 deg. I put a temp gauge on the line going from the tranny to the coolers and the out going temp seldom gets above 200 deg. There is no cooler in the radiator, it is the bottom 1/3 of the a/c cond. The 175 deg thermostat is to keep the tranny at its optimum operating temp. Now if the oil exiting the tranny get up to 200 deg, I turn the a/c on low to activate the fan. Install takes about 2 hr and cooler kit is around $90.00.
Last edited by grayfox4x4; 06-14-2011 at 05:03 PM. Reason: spelling