Interesting subject. Like Jack, I drive a gasser, so it's not always apples-to-apples with the diesel rigs.
But on the subject of T/C locking/unlocking, I was going though the transmission part of the factory service manual (2007 F150) one day. Ford's own transmission road test procedure suggests that the T/C should stay locked when letting off the gas above ~40MPH and unlocking only when the brakes are applied. But my truck has never done this, either when stock or w/ Gryphon. Letting off the gas unlocks the T/C, brakes or not.
From what I've read here and other places, it doesn't sound like anybody's 2004+ F150 stays locked when tipping out of the gas. So who knows what Ford was thinking...
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2007 F150 XL, 4.6, Regular Cab, Gryphon Installed 2/2009
"voiding warranties since 1979"
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Fri, August 14th, 2009, 01:15 AM
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