..and pay attention :| I really need to replace the radiator on the '72 F250 390 ATM 2WD. I found a candidate at Summit Racing. Out to the truck to take some measurements. I know it has the transmission cooler built in, I can see the cooler lines from the top side but one is a hard line and the other a hose? Looking up from the bottom, there are two hoses both going to the front of the radiator. Oh there is an add in 2nd transmission cooler, one hard line was interrupted to daisy chain in the extra cooler, I had forgotten that was there, but the fellow I bought the truck from said he had taken cattle to eastern Oregon, so that makes sense.

While I writing down dimensions, I might as well hit the rusty old bolts with a spot of penetrating oil, as long as I'm dong that I should hit all the rusty old bolts including the exhaust header bolts, the master cylinder break line connections, last time I changed a master cylinder a line was frozen to the fitting and I had to spin the master cylinder, you never know I might get lucky if I hit the fitting enough time over a number of days; I hit hood hinges and the lug nuts too.

While I'm hitting the hood hinges on the left hand side, there is an add in switch and a couple of fuses. I wonder what those go to? Maybe it had to do with the old, now not in use trailer light wiring. Huh I'll have to throw the switch, then pull each fuse in turn and see if anything breaks.

I wonder what kid of end is on the interrupted radiator line that the hose is slid on to, it will be interesting to pull it apart.

The Transmission line view from the top side

Transmission lines from the bottom side. I did say I need to replace the radiator; though I never actually seen it leak there is just a eh hem spot or two that is concerning.

Look close and the add in transmission cooler is siting in front of the radiator.

The mystery fuse holders and switch.

 

Normally the cooler is hooked up to the return line which has very little pressure. So just cutting a line and putting a hose clamp works to connect the line usually works without leaks.

As for what the switch goes to your going to have to trace the wires and see where they end up at.

 

I hate to highlight my ignorance but would you happen to know if that little black box just to the left of the switch is a standard item?

 

That is not a Ford part.