F650 as 5th wheel tow vehicle.
I'm currently towing my KZ Montego Bay Sportster with a 14K dry weight and close to 20K fully loaded with a 1999 F550 7.3 with 4.88 rear end. I'll start by saying I love this truck. In most all situat...
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ORbiker is correct, I put a 6.0 trans cooler in, I also had an aftermarket cooler with electric fan prior. The aftermarket cooler was not enough. With both coolers installed I have never seen temperatures above 185 degrees, previously I had seen up to 220 degrees. I also did some mods to the trans while I did my engine mods, I installed a billet torque converter, and a transgo towing shift kit. Don't know if that helped with the temperature but it sure improved the shifting and off the line torque, much easier to get it going from a start.
