Got it in. My impressions are: Increased engine braking is obvious, and the truck seems to go through the gears more quickly when accelerating. I haven't driven it enough yet to check gas mileage, but am not expecting a significant change, if any. My A440F has always been smooth, and no change there.
Since experiencing three occasions of the oil temp light coming on this summer during a 3300 mile trip, my objective was to reduce oil temps a bit. In all three cases, I was traveling up very steep hills and had the light come on near the top. The light quickly went off after pulling over, with no apparent ill effects. The tranny oil looked fine coming out in the draindown. I decided to go with synthetic fluid this time with the new filter. So, I'm happy with it so far. The temp test will come next time I travel the Klondike highway to Whitehorse, which may not be for a year or more. Oh, one more interesting observation to mention. I used to have a pronounced clunk when abruptly letting off of the gas pedal, then again when I goosed it. I no longer can detect this at all, so more good news.