[DAVID GAGNARD]

I have seen rear end coolers on NASCAR type cars,they have a small pump sometimes run off a belt on the rear of the driveshaft that pumps the fluid thru a cooler usually mounted under the car near the rear end center section and back to the rear center section near where the standard fill plug is located... A NASCAR related site may have some pictures and info....

Budman;
I run friction modifier in my 9",but it's main purpose is to "smooth out" or prevent "chatter" from the clutches in the trac loc unit...This may also help reduce heat some,but that's not it's main purpose. A lot of heat is generated from the ring and pinion as well as the spider and axle gears.A spool eleminates the need for spider/axle gears,so you eliminate half the moving gears in the rear end and hopefully half the heat buildup...

David