Jump to content

Tuners/gm tech input

M1ck3y

By M1ck3y
in Engines & Drivetrain

 Share

Recommended Posts

flyingfool Senior Enthusiast

flyingfool

Posted
Posted

i need to tinker with my HPT today ,,, where do I go in the software to adjust the kick down? anyone make a video on this?

WS6FirebirdTA00 Enthusiast

WS6FirebirdTA00

Posted
Posted

Those are all in shift scheduling. Downshift MPH vs. TPS. For now, I would leave WOT tables alone and in the normal tables leave 100% alone.

 

Also make sure you tweak the upshift if you make big moves on the downshift. You don’t want to make the transmission hunt between gears.

  • Like 1
WS6FirebirdTA00 Enthusiast

WS6FirebirdTA00

Posted
Posted

Let me hop on the PC and post some screen shots. 
 

What I mean is if you change the downshift table up 5 MPH, you will also want to change the upshift table.

 

If at 25% throttle you command a downshift below 20 MPH in a given gear (and say it was 15 - that will make it downshift “easier”) if your upshift was 21 MPH that would make a fast downshift and shift right back up. I would bump the upshift up about the same amount, at least a few MPH.

 

I have mine set up to stay in a low gear for MPH. Mid range has a reasonable downshift without having to stab the throttle to the floor. I also adjusted downshift times, but beware that if you jump on it in the middle of a downshift it will always lag there so just keep that in mind. I also setup tow/haul to be more of a sport mode. I don’t tow. The reality is there isn’t a lot different between the two. I do leave more negative off throttle/low throttle driver demand in tow mode in case I do tow.
 

I keep my converter locked too, I don’t see what people dislike about it. I actually prefer that over having it flash up on me. I also did adjust my TCC apply pressure, so maybe that is why I don’t notice issues too.

 

If I don’t post back up by the end of the day, PM me to remind me. This PC does an update about every time I turn it on and I lose the network and it takes forever to restart. Windows 7 was great, 10 sucks lol

  • Like 1
flyingfool Senior Enthusiast

flyingfool

Posted
Posted

good info thank you!

 the tcc on these Torque converters might have issues being locked up all the time.  premature wear  on the clutch ,  i would like to install a zl1 converter, hopefully those are built tougher

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Tyler Gibbs
      Travel Trailer 2024 2500 HD 6.6 Gas Engine ?

      By Tyler Gibbs · Posted

      The curb weight on a 1 ton crew cab long bed is around 7k lbs.  Now, I don't know where you went to school but 9k is not more than 2x 7k lbs. More than 2x 7k lbs would be 14k+.   With that said, obviously yes you're going to feel a 9k lb trailer when slowing down.  I already said, when accelerating.  When changing lanes?  No.  But if you look at the context of what was quoted, the original person said, "after a mile or two..." which means that would be after the accelerating portion and you're driving a generally steady pace.  Please do learn to read and comprehend.
    • sFrank
      2026 Silverado Range AFM DFM ECU loaction

      By sFrank · Posted

      So I purchased the Range unit for my 2026 and I am seeing different locations suggested for the ECM . Can anyone confirm wither under hood, left side or right side or behind the wheelwell?
    • No F-bdy Bs
      Dave's Auto (custom engine builder) tear down of L8T

      By No F-bdy Bs · Posted

      Like I've said before. Di and Carbon buildup is not that big of a concern. Engine had minimal buildup, and that engine was obviously not super well maintained. Do regular oil changes, and you're gtg as long as the rest of the truck lasts. Also, the High Pressure FP that people ****** about, but can't tell you why.  Now, I wish they'd trash the variable oil pump. No real world issues with them, but I'll gladly eat whatever miniscule MPG it's saving me in favor of more oil at all RPMs.    Curious to see his assessment of the 7.3 compared to the 6.6. I expect he'll praise the port inj, but from a structural standpoint, the 6.6 is as robust as any engine out there.    Not to take away from the 7.3. I feel it's equally as good as the 6.6.     As to heat on the rear cyls, I'd have to see numerous examples before I'd say it's an issue. Especially not knowing the history of that engine. For all is known, they could have blown a rad hose, and ran it hot, and the 2 rear cyls may be the first to get hot in a low coolant situation, but not be an issue aside from that. 
    • Donstar
      Navigating senior years.

      By Donstar · Posted

      "Life is getting back to normal."    I'm driving again and all new joints are operating as expected for this stage of recovery.   My most recent joint replacement still requires a lot of attention but experience has taught me that time will quiet the remaining pain.  I joked with my surgeon that another joint replacement would take my mind off my most recent surgery and he responded by saying the next will be a hip!  There are no plans for another surgery but, unlike me, I don't think he was joking!  I certainly wouldn't refuse further replacement  if required but hope to spend time out of the "post-op"  period.  I can't stress enough that if you have been recommended for total hip, knee or shoulder replacement that you welcome the offer.  Post-op "recovery" may sound daunting and painful, however, this is far better than the insidious erosion of mobility you are currently experiencing.  Imagine what it would feel like to wake up most mornings feeling better and more mobile than you did the previous day!  Prior to my first surgery in June 2025, even getting out of bed was becoming a formidable task.  Since the day after my first surgery, I get out of bed everyday easily and unassisted.  Making the switch to feeling a little better each day rather than a little worse, is hugely motivating!
    • Coastie05
      ‘25 Silverado purchase- back to dealership for bumper/radio issue

      By Coastie05 · Posted

      Hope it all works out for you. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...