fittings for trans cooler
 

I am trying to install an extra trans cooler on my 2003 super crew. I can not seem to locate the correct fittings so that i can connect it to the cooler that is already on the truck. the dealer was no help and the local part shops tell me they do not carry the parts i need. does any one know the thread size that may make my search a bit easer. i would rather not cut into the rubber line. thanks for any help

If your trying to put another cooler in series with the original; don't!
At the least put it in parrellel.
Series increases flow restriction.
Better to replace with one large cooler and a fan if you think you need it.

Depending on application I often run coolers in series. Some vehicles before the cooler some after. For extreme conditions I use a massive cooler with no factory cooler. I generally use the radiator cooler to prewarm for colder climates.
On the fittings you need it is hard to say we do not know what cooler you have. Some applications require custom making fittings. I have had to do that. Usually 2 fittings that get put together to get the result. I have had to open the holes up in some of the fittings before to prevent restriction. Alot of the aftermarket coolers are designed to accept 3/8 lines directly. I like those cooler because I just bend 3/8 lines all the way to the transmission. Flow restrictions are a thing of the past. The biggest problem with that is that if you want to use the radiator and you are making alot of transmission heat you will need to go to the cooler first. You will also need new fittings for the radiator which can be purchased,but usually need drilled out to get the flow increase.
Alan

Try a camper/rv dealer. Better yet,check out Camping World's web page.

thanks for the info still not sure which way to go. Am I understanding you guys that if i install the cooler in series i may genarate more heat. as for the fittings the only one i found was those that i would have to cut the rubber line and push in the barbed fitting. this i did not want to do but i may have to. the only reason i need to install this is that i pull a 27 ft. camper and the trany. temp hits around 190+ on the hills. I'd like to bring that down if i could.

Check this out ...

http://www.tccoa.com/articles/tranny/cooler.html

http://www.troyerperformance.com/cgi...gno=PPI-ATCKIT

If your temp of 190 is a pan measurement, I can assure you the fluid temp is much higher coming out of the converter.
If you cut the hard line near the front of the motor down by the crank, it will be a good place to break into the system (either feed or return) and make a neat installation.
Use double strap type clamps and flare the ends just a small amount so the hoses can't blow off.
There is only so far you can cool down because it's a function of load and transmission fluid shear in the converter.
Fluid temp out of the converter can be hotter than the radiator but becomes limited to the radiator temp minus the cooler effects going back to the transmission where it picks up heat again.
The pan temp becomes an average of all that goes on.
The only way all this can be influenced is by changes internal to the transmission for shift time, converter stall (slip) and converter clutch operation and a deep pan for more volume, greater pump volume etc.
On a secondary basis, the rear gear ratio.
These are the problems with pushing an F150 to it's towing limits. The trans lives on the edge of distruction, that you have to accept.
How do I know; went thru it and now have a custom built towing trans and a fan cooled cooler set to turn on at a radiator input temp of 185.