Flow Below Added

Do you know the specs, I have a new Western Star on order so I’m curious how that one I specked compared to the way I went.

 

I don't know the specs. There's no axle ratio sticker on the door jam. I'll ask the owner next time I talk with him. I just know it's a 2019 with a Detroit, 12 sp auto, 22.5 lo pro tires, disc brakes, self inflation system on the rear duals, flow below aero skirts, carrier comfort pro apu and conservative ecm/transmission files for max mpg.

You can mash on the accelerator hard and it'll go thru the gears a little faster but it's sluggish. You're just as well to ease into the throttle and let it get up to speed however far that takes for the best economy.

It maintains momentum in hills fairly well for what it is. Downshift sometimes lug as low as 900 rpms from 12 to 11 or 10 or 9 or whatever it might skip to. Skip shifts big jumps on upshifts like say 5th to 9th and then to 12th load depending. The 3 stage jake is the absolute best I've had in a truck. It held me at 47 mph going eastbound down Monteagle grossing 79,300 without ever touching the brakes.

 

if you wanna be a cheap ### like me you can go mudflap hunting in the grass behind the parkling lots in the truckstops and find a good size mudflap that got ripped out, drill some new holes a inch or so down where it ripped out and get a fancy new one for free! look for higher than normal curbs, its mudflap central back there.. never know what you may find in that truckstop grass area... its good treasure hunting

 

Yeah the autos on stage 3 are absolute beasts. Check in the passenger side glove box for the rear ratio

 

Already did, weirdly there's no passenger side glove box in this truck.

 

There is no passenger glove box on the P4 cascadias. Axle ratio isn't on any easily readable sticker, to my recollection. Odds are it's a 2.05.

 

Yeah I'm guessing a high 2's on the rear ratio. Another feature of the transmission when you have the cruise set when it crests the top of a hill it will kick into neutral and coast down the otherside until it senses slowing down going up another incline or just on flat ground, then kicks itself back into gear. Now if you let off the accelerator while going up a ramp, or anytime really, again the transmission kicks into neutral and coasts. As soon as you tap the brakes or hit the accelerator it automatically kicks back into whatever gear is appropriate.

 

Ahh ok the newest ones I drove were 15-16s

 

Be gentle on the early gears, then bury the pedal in the floor once you hit 6th. That's what I found to be the 'sweet spot' for acceleration and fuel economy. Get into the fuel pedal too much too soon and it will think you want power and run the rpms up to 1700 before shifting. It's also interesting to watch the difference in shift points between using the fuel pedal and using the cruise. Cruise will engage over 10 mph, so if you've previously had it set at 65, come to a stop then hit resume once it allows, you'll find the shift points are entirely different than using the fuel pedal (easy or heavy).