myredracer wrote:
We can't turn OD on or off, unlike our old 2000 F150.
Our transmission doesn't seem to hunt. I use tow/haul nearly all the time when towing and it seems to select the appropriate gear at the appropriate time just fine. When I was going up the 10% grade at 50-55 mph, it was running nicely at 4,000 - 4,500 rpm and stayed in the same gear.
It also downshifts nicely when in T/H when slowing down going downhill.
I hear people saying they lock out their transmissions all the time and it seemed like a basic and simple thing to do. I thought maybe you just flicked the right switch or pushed the right button like when switching in an out of T/H mode. I don't seem to have any better idea of understanding "locking out" from the above posts and maybe it's something I don't need to know or worry about.
Newer trucks have a six speed transmission that has the 5th and 6th gear as overdrive. The transmission has a manual mode that allows for the driver to select what gear and rpm shift points. Just like an old manual transmission except no clutch. You upshift and downshift as needed to keep the rpm's at the optimum range. And you can select to "lock out" the overdrive to prevent the transmission "hunting" on you.
