Jump to content

Limited speed?

6TEEN5.3

By 6TEEN5.3
in Engines & Drivetrain

Recommended Posts

6TEEN5.3 Enthusiast

6TEEN5.3

Posted
  • Author
Posted

15 6.2 factory 20's, I get 98mph. I heard the reason for the lower speed rating was due to critical driveshaft speed. Do you guys with the higher limiter have the 3.08 final drive?

I have 3.42 and hit 108. I haven't had a chance to run it again but I'm pretty sure she'll cut off at 112

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

15 6.2 factory 20's, I get 98mph. I heard the reason for the lower speed rating was due to critical driveshaft speed. Do you guys with the higher limiter have the 3.08 final drive?

3.42 and 112. Not too interested in driving that fast now that I have ridge grapplers

 

 

Sent from my iPhone using Tapatalk

6TEEN5.3 Enthusiast

6TEEN5.3

Posted
  • Author
Posted

3.42 and 112. Not too interested in driving that fast now that I have ridge grapplers

 

 

Sent from my iPhone using Tapatalk

I have the same Nittos and I am surprised at how smooth and quiet they are

StinkyCheese Senior Enthusiast

StinkyCheese

Posted
Posted

Looks like GM has raised the limiter a bit. It was 98 for everything up to 2014? What are the speed rating of the tires on the 2016s when they come from the factory that are able to do 112? GM often sets the speed limiter based upon the speed rating of the tires it comes from the factory with.

Must have been a 1500 thing. I know 3 of our 2500s with 4.10s did over 100. I might have hit 100 with the duramax, not sure. It doesn't care if I'm cruising 90 in 100+ degree heat though. Not that I drive over 100 all the time.

 

Sent from my Find7 using Tapatalk

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

Must have been a 1500 thing. I know 3 of our 2500s with 4.10s did over 100. I might have hit 100 with the duramax, not sure. It doesn't care if I'm cruising 90 in 100+ degree heat though. Not that I drive over 100 all the time.

 

Sent from my Find7 using Tapatalk

My 12 2500hd has 3.73s and shuts me down at 98mph...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

I have the same Nittos and I am surprised at how smooth and quiet they are

Coming from factory duelers and having never had a mud tire I thought they were pretty loud. I've gotten used to them now, but I still think KO2s are quieter

 

 

Sent from my iPhone using Tapatalk

MaverickZ71 Senior Enthusiast

MaverickZ71

Posted
Posted

Looks like GM has raised the limiter a bit. It was 98 for everything up to 2014? What are the speed rating of the tires on the 2016s when they come from the factory that are able to do 112? GM often sets the speed limiter based upon the speed rating of the tires it comes from the factory with.

 

It does sound like the General raised the speed limiter. Most of the GMT900s came from the factory with "S" rated tires (112 mph) but were governed at around 97 mph for some reason.

 

Not sure it makes sense for the new generation trucks universally known for the "Chevy shake" to be governed at a higher speed. Go figure.

StinkyCheese Senior Enthusiast

StinkyCheese

Posted
Posted

My 12 2500hd has 3.73s and shuts me down at 98mph...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

Interesting. '99, '01, and '06 weren't limited that way. Well I'm sure the '01 and '06 weren't but I'd be surprised if grandpa didn't hit a 100 a few times in our travels merging or passing in the '99. We didn't have the '02 1500HD long enough for me to remember anything about it other than GM dealers kept telling us the truck didn't exist and it didn't have the 4.10s so it pulled like poop. First, last, and only 6.0 w/o 4.10s in the butt.

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

Maybe it's an issue with speedometer readings? Does the limiter directly follow the speedo? Would tire size effect it? I know many German cars which are limited to 155 regularly will pull past to 160-170

 

 

Sent from my iPhone using Tapatalk

RUSSH Enthusiast

RUSSH

Posted
Posted

Mine cut off last night. It's the first time I've brought it to top speed and I thought something was wrong. It was right at 99.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • needafix
      2019+ Brake failure, it's complicated

      By needafix · Posted

      I'm not sure if this should be a new topic, let me know if it's out of place. This my first post. Thanks 85077522 - AC Delco GM Genuine Parts Brake Master Cylinders. Anyone else had to replace this brake master cylinder yet. I didn't do any brake work, it looks like new parts and I've had the truck for about 4k miles, 119k total miles.  When it started to throw codes I did the calibrations with a bidirectional scanner and got the codes to clear but they came back so I did the routine; base bleed, automated bleed and final base bleed. All that with Bosch ES16-32N fluid (please look it up). That seemed to fix it but 100ish miles later it failed again so I ran the same process but with a pressure bleeder this time and got the same results, fixed for 100ish miles. The original fluid looked bad and I thought I got most of it out, it could've been the wrong fluid. The codes; P25A2, C05B0-00, C2A1B. I can get them to clear but not for long. The C05B0 indicates a leak in the front circuit (which is bone dry) so I'm thinking of doing the bleed process on that front again today and I don't know if that's taboo to just do the front but at this point it seems like it's worth the try anyway. The new master cylinder/module unit is supposed to get here today. But now I'm pretty much convinced this install is over my head. I've called several shops and some mobile guys that I know but this thing is like radio active material, scary wise. I did get 2 local shops say they should be able to do it, one says he has the SPS2 programing capability. And with the battery disconnected is there supposed to be pedal resistance, mine is to the floor, then if I pump it I can get some resistance. I had a panic stop prior to this issue which may have contributed from what I read. And on the first attempt to bleed and hydraulic test the scanner listed things to look for and one was any gaps between the pad and rotors which I did notice on the RF corner and I removed the outer pad (where the gap was) cleaned it and the hardware and didn't see a gap after that but will re-check it. Any suggestions, questions and comments welcome. 
    • Donstar
      Navigating senior years.

      By Donstar · Posted

      Next Friday will be my 6 week point from my right knee replacement.  The surgeon says it will be fine if I choose to drive after this checkup.  I know I could drive now but best to do as my surgeon (and my wife) tell me.  Richard compared being 62 to 72.  I remember when I was in my early 60's I was experiencing slow but regular decline in my mobility.  Thanks to good medical support,  i continued to fight the speed and spread of this decline. During my 60's I worked on non-surgical methods and just when I turned 70, my orthopedic surgeon recommended joint replacements.  In a little over a year, I had one shoulder and both knees replaced.  This hasn't been a terribly fun experience, but worth the discomfort as my future mobility health trajectory has reversed.  It is a treat to now be watching my mobility. balance and confidence steadily improve!
    • Another JR
      Trailer TPS Sensor Question Rim Size

      By Another JR · Posted

      Grommets with the right cement should be perfectly fine. 
    • Grumpy Bear
      Some Assembly is Required

      By Grumpy Bear · Posted

      This is going to take allot of Assembly    
    • PunchT37
      Transmission Temperature Hitting 220s

      By PunchT37 · Posted

      Why do they have the gas 10l80 opening at 145?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...