Why did all mega carriers stop using manual transmissions?

i parked my Volvo at 1,397,000 miles... the only auto specific repair was the XY shifter

 

That’s not possible. Everyone here says autos are shop queens.

 

I know of a Super 10 with 3.6 million, and only it's second clutch, and a 13 in a 83 359 that the driver bought new. Put a clutch and synchronizer in it at 3 million.

 

A clutch should last for the life of a truck unless you do off road like logging or heavy hauling.
Knowing how to float shift is the key.

 

Apples to oranges there... At 100k, nobody has any business running a 12.9 liter engine. The entire difference in pulling and economy at 100k is the lack of 2 liters' displacement.

 

Yep..the more power the engine has. The better the economy I get.

 

("You can program it to do what you want , the driver can’t control it and thus can’t mess it up or fry clutches or snap U joints .")

That level/type driver will cost you money in many other ways. All the built in safety warnings and the autos will not take the place of a well trained/experienced employee who is there to do the job, not "drive big trucks for big bucks".

There is a phrase "Christmas help..." They don't know anything, are not interested in learning anything, will not be there long enough to be taught anything,
and if kept on after the caused rush is over, will occupy slots and cost you money till terminated..

 

Some of the hardest running with/following to see what it is; you will ever do, is behind a good woman driver. I have got that showed to me several times...

 

I got stuck in the mud the other day with my company auto truck. That day I wished I had the manual so I could rock it out of the mud. Lol. Luckily I was helped by two of the customer workers with shovels to dig me out. And had the dumb super singles on the truck too. I hate those.

 

The wides have their advantages of not picking up rocks between the duals.

They suck if you get a flat though. Have to call road service.