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Re: the ford P/U. I have a 2003 expedition which has the same drive trains as the 150.
The 4E70 is a great tranny, and the mechanic at the dealer called it "the towing tranny" however, if you have not done so, I strongly recommend to have the fluid and filter changed, and every 25K afterwards. I am pulling close to 8000 with a tongue of 500 using the equalizer hitch. I bought it with 39K miles, and have put 100, 000 on it since, with everyday driving and towing. good package. Run it in drive, but activate the "O/D disable" or "tow switch" . If you have the tach, at 55 should be around 22-2400 RPMs. The "tow' switch also changes shift points which is highly desirable.
You have done what I have or would have done. Maintain it and it treats you right. Had mine for 20 years now. t doesn't owe me anything.Mine has the 4R70W (4-speed) transmission.
I doubt (but don't know for sure) that the fluid/filter had been changed prior to my ownership, which started at 191,000 miles. Oddly enough, when I pulled the pan, the fluid was still a pink color and did not smell burnt. While I was at it, I also changed the fluid in the rear diff and didn't find any unusual wear.
I always deactivate the overdrive when towing. I also have a weight distribution hitch, and air bags on my truck and it tows fine. Max comfortable speed is 60MPH with mine, which is mainly due to the aero drag more so than the weight.
With Ford, if it has the factory H/D tow package, its loaded for bear.
The temp gauge went to mid-scale which is where it is non tow, air on or off, and stayed here. Wife was in the back seat watching a movie on the DVD player built in.
I think we are saying the same thig, but with different words. Looks like we boat are techno-nerds.Mine has the factory tow package. Besides the airbags and WDH, all I had to do was plug in a brake controller.
Not sure if you read this entire thread, but I installed a transmission temp gauge to keep an eye on it. Since it has a factory cooler, even with 100F ambient temps, the transmission temps have yet to reach 200F.
The water temp however started to concern me when on another trip (again with 100F ambient temp) it started to creep past mid-scale. Not know exactly what that meant, I backed it down to 55MPH and the temps came back down.
Due to that fact (not knowing the actual temp), I'm not a fan of the factory 'gauges'. Without numerical graduations they mean almost nothing to me. I immediately installed an aftermarket water temp gauge so in the future I would know the actual temp.
On the next trip the ambient was 98F. The actual indicated water temp peaked at 208F at 60MPH. I was in no hurry, so I backed it down to 55MPH and the temp reduced to about 200F on that trip. Modern engines are designed to operate at about 220F in the 'normal' range (emissions stuff I'm sure) but the old school engines not so much.