2002 7.3 Trans temo running 250*+

Smokin 6.0 · Jun 15, 2015

Running my 2002 with a superchip the other day on the 85hp setting and my tranny started to over heat (250*+) I did away with the cooler that runs through the radiator and just put a cooler that is 14x8x3/4 in.. Thinking this is my issue and the cooler just isn't big enough. Any help is appreciated. Thanks

drunk on diesel · Jun 15, 2015

run them in series, but don't get rid of the fluid cooler. a fluid cooler is far more efficient than an air cooler

Smokin 6.0 · Jun 15, 2015

Ok I just did it because I toasted the last tranny and was afraid of metal shavings stuck in the radiator cooler.

drunk on diesel · Jun 15, 2015

I would definitely flush it.

if you're going external, you need a huge cooler. take a look at an OEM trans cooler for a diesel truck if they don't utilize water

Powerstroke Man 6.4 · Jun 15, 2015

Smokin 6.0 said:
Ok I just did it because I toasted the last tranny and was afraid of metal shavings stuck in the radiator cooler.

Look at a OEM 6.0 cooler.

My 7.3 toasted my transmission as it used to run 250+ cruising no load. I had a cheap NAPA cooler.

Got the new transmission and put a 6.0 cooler and problem solved.

http://sunrisefordparts.com/parts/2...group=TRANS OIL COOLER&component=Trans cooler

DEEZUZ · Jun 15, 2015

How in the hell does a trans get that hot? Hottest I've ever seen was 180 with 5k and a 203 ac on highway speed

Mark Kovalsky · Jun 15, 2015

Smokin 6.0 said:
Running my 2002 with a superchip the other day on the 85hp setting and my tranny started to over heat (250*+) I did away with the cooler that runs through the radiator and just put a cooler that is 14x8x3/4 in.. Thinking this is my issue and the cooler just isn't big enough. Any help is appreciated. Thanks

That is WAY undercooled for a stock setup. With an additional 85HP running through the trans I'm surprised it didn't get hotter than it did.

You need to junk that tiny cooler, it belongs on a Fiesta, not a truck. Get a cooler from a 6.0L truck, and I recommend the radiator cooler, too. If it were my truck I'd replace the radiator. I do not believe there is an effective way to flush it.