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bigdeer1

By bigdeer1
in Troubleshooting & Recalls

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ChrisNJ Enthusiast

ChrisNJ

Posted
Posted

Amen Mike, it's all about mpg, drivability suffers. And we have a hundred+ more hp than older engines and the new one's drive worse. And the old 5.7's or 6.0's got 13-14mpg, go figure. All this 'marketing' HP is only good if your racing or towing. I've never tuned a truck before, but I will on my '15.

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bigdeer1 Enthusiast

bigdeer1

Posted
  • Author
Posted

For some reason I thought I had a 3.42 rear end... I guess not. Top right of pic it says 3.08.. Is that what this truck has or is that just an option. There stickers are kind of confusing to understand what's actually on the truck or as just an option to have

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ace ventura Enthusiast

ace ventura

Posted
Posted

I'm sure that has something to do with the truck constantly shifting constantly. Ugh

If your going to go with a bigger tire eventually you might be changing the gears anyway. Just remember if you have a 4x4 you need to change both front and rear. .

 

As I mentioned earlier the inexpensive way would be to do a custom tune. I had 3.42 gears on my last truck with 4 speed and big tires. Before and after the tune was night and day. I felt after the blackbear tune it was good enough and never changed the gears.

LTZ2014 Enthusiast

LTZ2014

Posted
Posted
Once it's "flashed back" how do u reactive the tune? Sorry I've never read into detail about Blackbear and how it works... & yes.. U know exactly when that sucker drops into 4 cyl mode... It's how market

Imbarssing.. Once I hear it I just slam on the gas and it eases the pain alittle..... :/

 

You flash the modified tune back onto the truck using an autocal (handheld unit).

 

I dont have the V4 issue anymore and it is amazing to drive :)

 

What about your gas mileage Ryan? I had a Blackbear on my last truck but it had 37's so I can't really compare any gas mileage gains from the tune. Just wondering if you get better mileage after the tune and even after disabling v4 mode?

 

 

Sent from my iPhone 5 using Tapatalk

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

What does a tune actually affect?

 

The main item is transmission shift points.

 

 

 

What

about your gas mileage Ryan? I had a Blackbear on my last truck but it

had 37's so I can't really compare any gains from the tune. Just

wondering if you get better mileage after the tune and even after

disabling v4 mode?

 

 

Sent from my iPhone 5 using Tapatalk

 

My truck being the L9H does not have AFM. What I was speaking of was my camaro L99 that has AFM.

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

What about your gas mileage Ryan? I had a Blackbear on my last truck but it had 37's so I can't really compare any gains from the tune. Just wondering if you get better mileage after the tune and even after disabling v4 mode?

 

 

Sent from my iPhone 5 using Tapatalk

 

My truck being the L9H does not have AFM. What I was speaking of was my camaro L99 that has AFM.

 

What about your gas mileage Ryan? I had a Blackbear on my last truck but it had 37's so I can't really compare any gains from the tune. Just wondering if you get better mileage after the tune and even after disabling v4 mode?

 

 

Sent from my iPhone 5 using Tapatalk

 

My truck being the L9H does not have AFM. What I was speaking of was my camaro L99 that has AFM.

pm26 Senior Enthusiast

pm26

Posted
Posted

Have you tried driving your truck in the tow and haul mode? It raises the transmission shift points considerably and you may find it a lot less objectionable this way. It has no effect on anything, just light penalty in fuel economy.

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted
Have you tried driving your truck in the tow and haul mode? It raises the transmission shift points considerably and you may find it a lot less objectionable this way. It has no effect on anything, just light penalty in fuel economy.

 

Read post #62

 

 

Ryan

anthony2558 Enthusiast

anthony2558

Posted
Posted

Just tried it. Surprisingly the truck ran nice! It held a gears longer giving the truck nice power when needed. Funny because I've been averaging 8-9 mpg around town lately but once I hit two haul and noticed the difference in the truck shifting I reset my trip and avg mpg just for fun. To my surprise it drastically improved. The truck holding lower gears to accelerate and finally getting to speed the truck seemed to relax more once at a my desired speed.

 

good to know.

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