WOT Junkie and avid corn burner
Join Date: Jul 2008
Location: Virginia Beach, VA
I will add that it probably helps to have an auxiliary cooler on the trans. Just make sure everything else is in good order. Make sure the condenser fins are straight, the fan is good, and the radiator isn't full of corrosion. As for radiator replacements, I replaced mine with a good quality stock replacement. I still utilize the built in trans cooler in conjunction with the Hayden 679 cooler. In the dead of summer, no cooling issues. As Rob has said, if you're overheating with everything else fresh, you have other issues. Some will argue about using the built in trans cooler, but I have never had any problems with it. I was on my original radiator at 130,000 miles and still didn't have any issues. Reason I replaced mine was one of the side tanks started to weep coolant.
We get hot summers here too, some days are over 100 degrees.
Michael M. ASE P2 Automobile Parts Specialist.
1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.
1985 Mustang GT. modified stock Holley 4180C, Weiand Street Warrior intake manifold, equal length headers, true dual exhaust, 5 speed, 3.55:1 8.8'' rear end, Ford Racing 10.5" clutch.
1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.