[hayjayhorses]

In my 2000 F550 7.3, 4r100, 4.88, 4" turbo back gross, stock fuel no chip, gross weight about 40,000 pounds. My gauges have a high temp recall feature.

I have a temp probe in the thermostat housing. On a hot summer day pushing a big hill it will get to 218, with the stock exhaust I got it to 225. on the flat it will stay about 190 (my foot is still in it).

I had a temp probe in the oil cooler port, under a load the oil would run a consitant 20 deggres hotter then coolant. I Have recalled that temp at 240 once.

I have 2 tranny temp probes one in the pressure port (tranny case) and the other in the line comming out of the tranny with my new tranny (Billet multi disk, shift kit, Long tru cool max tranny cooler) in last 15k miles the highest case temp I have seen is 195 and the ECT was at 215 on a 4 mile hill fully loaded, generaly the case temp will run 140 with an empty trailer (17,200# gross) and about 150-160 loaded. The temp comming out of the tourque converter will get to to 200 in town with a hevy load but cools right down to the same temp as the case shortly after the converter is locked up.

I also have a fan on my tranny cooler that turns on @ 160 case temp or by a swith, I turn it on in town with a load, it works very well. I mounted the tranny cooler (long LPD4739) in front of the ac condenser, and an electric fan is mounted in front of the cooler I cut out some of the grill, I will post some pics later.

With the stock tranny and cooler I could easly get the case temp to 220and line temp to 240 and it would take a long time to get to under 200.