2015 Chevy 2500HD 6.0L gas Ike Gauntlet

There should be separate sets of testing. Let the truck make the decisions for one(for the people that want to be hands-off), then force the best shift sequence in another. On cruise, my 6.2 will hold a gear until it loses exactly 3mph before it downshifts. By that time, it usually takes 2 gears lower to make up the lost ground when it could easily get by with 1 gear lower. It will hold 2mph below the setpoint for a mile without downshifting, which I don't mind. I understand it is desirable to hold a gear if it's nearly maintaining speed but they could do a better job of tuning the "D" parameters in the controls to handle varible grades. Maybe they are carrying over tuning from the 6.7 and isn't optimized for the gas version.

I guess my 2nd point is that they should have constant speed tests on cruise in hilly terrain. If you want to set it and forget it, how well does it hold 60mph.

Good theory.

I have owned three Silverado's with the six speed transmission and all downshifted when necessary. When I approach a mountain grade, I use the M option to select a gear that can be maintained to the top. I have this theory that it is better for the transmission to begin the climb in the proper gear rather than make a full throttle downshift half way up.

kw/00 wrote:
Yep he could have used the little toggle switch on the side to change te gears for his needs but choose not to. And then went on complaining about it. U know a little common sense goes a long way.... The switch is there for a reason...I use mine always and never complain about pulling the grades...

I think their intention is also to test the shift mapping and overall programming and performance of the transmission when towing. They do the same thing coming down the hill -- they let the truck decide when to shift.

They really don't seem that bright or to understand trucks too much, I'll give you that! I watch most of their videos, though.

RCMAN46 wrote:

MARK VANDERBENT wrote:
These Fast Lane Truck tests are a bit cheesy if you ask me. I put no stock in their tests. Compare these tests to the pickuptruck.com test of the 1 tons. And they make a living of this ????

Did you notice they were asking for money at the beginning of the Video! Now that is cheesy.

X2!

MARK VANDERBENT wrote:
These Fast Lane Truck tests are a bit cheesy if you ask me. I put no stock in their tests. Compare these tests to the pickuptruck.com test of the 1 tons. And they make a living of this ????

Did you notice they were asking for money at the beginning of the Video! Now that is cheesy.

The reason they don't shift the truck manually is because there want to see how well the factory has the shift points mapped out.

FishOnOne wrote:

rhagfo wrote:
Wow, almost impressed $50,000 2015 3500, and my 01 can pull the same load!

Rated GCVWR just north of 20,000#, my 01 is 20,000#.

I would take the '15 Chevy over your '01 anyday. :W

Well not for $50 k and get pulled down to 35 pulling 12,000#, I pull 11,000 with 3.55's and have never seen south of 50 on a grade.

360 HP and 360 lb. ft. of torque, I am also south of 300 hp, but north of the 360 lb. ft. of torque.
Just remember the GCVW is 20,500#, the trailer weighs 11,920, and they have some weight in the bed of the truck to get it to 20,360#. I tow between 19,000 and 19,500, and can hold speed, sorry not going to spend $50,000 for a TV that won't do the job that my 14 year old TV does already!

Sorry, thought gas engines had improved more than that in the last 15 years.

These Fast Lane Truck tests are a bit cheesy if you ask me. I put no stock in their tests. Compare these tests to the pickuptruck.com test of the 1 tons. And they make a living of this ????

None of those guys are especially bright...

They complain about the rev drop after a shift to 3rd, and thinks it's for fuel economy. Well, gear ratios dictates your rpm splits regardless of fuel economy tuning.

The ratios aren't actually all that bad. Anyone remembered the old 4 speeds or Dodge's 545RFE "5/6 speed" would know what real bad gearing is about - those things dropped your revs in half after a shift!

My lil 1500 would clean that truck's clock, thanks to 8 speeds and 395 hp, but will run out of GVW for a 12,000 lbs trailer, unless I eh, take off the tailgate and spare tire :P