8 Speed Auto for HD trucks

mowermech wrote:

valhalla360 wrote:

Me Again wrote:

So you are saying they are now throw away trucks? A Cummins engine can go a million miles. Wonder how many transmissions that will take?

The "million mile engine" myth...sure you can keep most any engine going that long but at 15k miles per year it will take 67yrs to hit 1 million miles.

Yes, most trucks are throw away before year 30 let alone 67. No manufacturer is designing and building based on million mile assumptions.

"million mile myth"?
it has already happened. I'm sure if you were to google it, you would find the reports.
My truck is almost halfway there, at 408,000 miles. The transmission was rebuilt once, and may need it again soon.
I got a good chuckle out of the "2 speed and three speed" comments. Am I the only one here that ever owned the GM Hydramatic 4 speed that Pontiac, Kaiser, and others used? Surely not. Even the military used it, or a variation of it, in 6X6 trucks. Of course, the M211 was quite possibly the sorriest 6X6 ever built...

Yup it's a myth....you're at 400k on a 20 year old truck. So get back to us in 30 years when it hits a million. Or tell you grandson to!
Why the chuckle? No I'd never heard of 4 speed hydramatics, but I just looked it up and realized they died almost 20 years before I was even an itch in my daddy's shorts!
And they were so awesome, I've seen exactly zero of them......ever. what again does it have to do with the conversation? They realized that less available gear ratios were better so they dumped it for half the gears and it took another 40 years for someone to realize that was a flawed theory?