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Re: Overdrive Off vs. Tow/Haul
This is how I used to drive my old 1996 E150 van with 300 straight six.
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I can't comment on the effect on ATF temperature
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As one of the first Econoline torqshift temperature monitors, allow me to say: I havn't noticed a temperature difference between towing and unloaded at highway speeds. I believe I recall reading something that says that the torque converter stays locked in all gears higher than fourth (of six). So going back between OD off and OD on doesn't unlock the torque converter, and an unlocked torque converter is where 80% of the heat is generated. When you take it out of overdrive, there is an additional planetary set spinning, so there will be an incremental additional amount of heat generated. But nothing like going stoplight to stoplight, which heats it up quickly unloaded and even faster with a trailer.
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Now I need a trans temp guage. I know that Autometer makes one. Where on the transmission does it get installed?
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Click my pictures, below, to see what you'll be up against. There is also a thread on this topic here and here.
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Pictures . . . Parts Links
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