We have ordered our first 5th wheel RV, now I am thinking I may want to upgrade the tranny cooler? Our TV is the 01' 7.3L with the 4R100. What are my options fellas?

 

There are a lot of options. In my opinion the best option is to scrap the air to oil cooler that came with the truck and replace it with one from a 2003-2007 6.0L truck. The routing is from the front of the trans to the radiator cooler, from there to the 6.0L cooler, and from there back to the rear of the trans.

 

To add to what Mark said, here is the part you want.

26 row transmission cooler

On my e99, I added this cooler along with the 2004 radiator 4C3Z8005EB
to get the OTW cooler as well.

Here are a couple of pictures of the new lines.



Drivers side


Passenger side

 

To add what the others have stated with a Caveat, The 6.0L Cooler is an excellent choice, along with REGULAR maintenance.

CAVEOT:

Any quality "Stacked Plate Cooler" is going to out perform your stock cooler. Not because your stock cooler is a poor design. But, because it's OLD; blockage, debris, poor maintenance, etc. all have negative effects.

I have a Doral Brand and can pull #8,500 lbs. and not see above 180* - 190* on a 100* day. When I stop it does get to 200*+ after pulling for a few hours. Don't just turn it off when this happens, an increased Idle for 10 minutes will drastically lower the temperature and allow the fluid to carry heat away from critical components and drops temperatures below 170*.

Fluid is much more than a lubricant and pressure generator. 200,000 miles and my transmission is in excellent condition towing regularly and performing maintenance (Just jinxed myself).

 

Chipworkz,

That is some great information and thanks for taking the time to put the links in your signature.

Thank you,

Big Black Dually

 

Thank you Chipworkz, awesome information.

 

to add to others i have a 2000 sd 7.3l and i went with the 6.0l cooler love it!
my trans temps dropped 40* average. was easy to do(take off the front bumper) and my cts monitor shows a 40* diff to the eot now instead of 5*

 

Like the drawing and pictures.

 

Put a 6.0 cooler on mine and it made a big difference, how much does your 5th wheel weigh?

 

Sticker on side of trailer states 9800# dry. I haven't had a chance to take her over a scale yet.

 

Another vote for the 6.0 cooler.

I have a 2002 f350 and I'm towing gear to my weight rating and sometimes a little over and it never gets too hot.