Quote:
Originally Posted by SmokeyWren
With an automagic tranny, no.
But with your hand shaker tranny, you have to worry about lugging. NEVER allow the engine to lug.
Lugging means you have pedal to the metal but engine RPM is not increasing, and instead RPM is falling. Maybe falling ever so slightly, but falling just the same. Your analog tach is not precise enough to drive on the edge of lugging, so if you do it, then you need a digital tach - such as the digital tach that is included with the Ford factory optional auxiliary idle controller (AIC) fo '99-'04 PSDs.
The cure for lugging is to downshift.
The cure for too-high EGT is to back out of the go pedal a smidgen. So you should be able to climb the mountain at 1,200 to 1,250 EGT by modulating the go pedal. But while doing that, if you ever mash harder on the go pedal and speed/RPM does not increase, then you need to downshift, regardless of EGT.
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John Deere not only condones lugging, heck they even use it as a marketing tool called "torque rise". Basically the analogy is you are plowing along at a RPM higher than the torque peak with a constant throttle setting. When tougher ground is encountered the engine lugs down into it's torque range and powers itself on through.
Torque rise
