DOWN Shifting

Explain why this is so?????? I can't think why this would be true. Maybe I lived a sheltered life in my 22, or is it 23, years of driving, mostly in hilly/mountainous terrain, grossed out most of the time to boot!

O.K. back with an edit. I do double clutch. When going down a steep grade and shifting up. Don't touch the fuel, just double clutch and grab a higher gear. Can't think of any other time I would double clutch other than this.

 

You dont need to double clutch it all the time, I can use one fast hit on the clutch pedal and get in gear.

 

Your edit is the reason why. Another time I can think of is driving on a slick road.

 

Double-clutching is always better on the transmission when going up a hill, regardless of the truck you're driving. That being said, no two trucks are the same. You can have two Cascadia's that were manufactured with identical specs, from the same plant, and on the same day and yet they can have a different sweet-spot. My truck for example is optimized for progressive shifting. This is my trucks sweet-spot for upshifting:

1st to 2nd = 900 RPM
2nd to 3rd = 1200 RPM
3rd to 4th = 1400 RPM
4th to 5th = 900 RPM
5th to 6th = 1200 RPM
6th to 7th = 1400 RPM
7th to 8th = 1500 RPM

Notice how the RPM's go down after you select the higher range gears. Because of the way my truck is optimized, if you try to float while going up a hill, you're going to grind up a gallon of coffee and loose your momemtum. You'll need to max out the RPM's to the governed speed and then double-clutch.

Another Cascadia can be tuned to shift at 1500 RPM for every gear, but most DD15 power plants are tuned/optimized to shift at a lower RPM.

 

You are correct, I try to avoid that if at all possible.

 

As do I, but that is not always possible. If you run into some weather, and cant find a place to park, you have no choice but to drive through it.

 

"The only thing stopping people from achieving there dreams is the same person they see in the mirror." Excellent perpspective. Thanks buddy.

 

a fast hit of the clutch to pull out and let the jake drop the rpms gets you into gear quick... but you have to know the truck and tranny.

 

Ill say it again, throw out all the books and kick the driver trainer out the door, and Feel out your truck, Feel out your engine, and Trans. KNOW your truck, and it will treat your right. Just to throw this out there, Have you ever felt the vibration in your trans? You over the RPM`s on it. Back down the R`s and the shifting will come easier. Practicing will make perfection.

 

BTW I had to drive a B-truck (loaner from the shop) today with that new electric-clutch automatic,,,,

OMG what a piece of ####! My wife could shift smoother!

Procedure from start, floor it *wham* 2nd *wham* 3rd, lift *urrp ROOOOOAAR* 2nd.

You have to come to a full stop and count "1 mississippi 2 mississippi" to go into reverse or it will beep at you and call you names. Made a k-turn take over 3 minutes.