DT12 vs 13 speed

I shift when I hit the Rev limiter....

 

I've got the dt12. Last 80k miles that I've been tracking it, I'm at 8mpg overall. And that includes using the bunk heater and idling the truck.

Maybe I just got the lucky truck in the bunch but I've really not had any issues with e coast jerking the truck or with getting the jakes to stay on while the truck is in auto. They do the 2200 rpm skip shift to 10th if I put them on high but other two settings they stay in gear unless I also hit the brakes.

As far as what I'd take? I'd rather have the 13. Mainly because of snow. While I know this auto pretty well at this point, it's not very comfortable never being quite sure it won't try to kill you when driving in snow and ice.

And yeaaaa the "never use jakes in conditions".... whoever came up with that line must have been driving that desk their whole life. I'm pretty sure they're trying to get rid of people every winter that way...

 

Your experience with this truck is exactly the opposite of mine.

 

I always wondered why it's programmed to rev the engine up past the rev limiter for the jake brake. Not doing any favors for the next owner.

You run a youtube channel right? In one video you had a hell of a time sliding tandems one hole with your automatic? I was frustrated along with you lol

 

I don't know where you got info that low pro 22.5 has 498 rpm. I thought they have 515 rpm. 11r22.5 or low pro 24.5 have 496 rpm.