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Dick,
I have a 2002 Ford 450 PSD. It is the 7.3 diesel engine and I have 4.88 gears with the standard automatic transmission. I do not have the tow haul feature.
I drive with the OD on with the cruise on except when climbing mountain grades. I turn the cruise off before the thing starts looking for a lower gear. The OD will drop out when the grade gets severe enough to start slowing the rig down. At that point it will also drop to a lower gear.
When I towed with my Ford 250 PSD the tranny would start hunting for lower gear just going up an overpass! I'd have to take the cruise off to keep it from doing that. I've never had the 450 do that. The 250 and 450 had the same engine and tranny. The only difference is the 4.88 rear end gears. I sure wish I had the "tow haul" feature. Later, Dennis
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