Anyone know how to diasable the 99 mph shut down on 2016 silverado. No not wanting ti run 140 all the time one even good portion. Just want truck to do what it shows on speedometer.

On you tube show how ti do with fully loaded model and more stuff than I have access to. Work modle here with very few frills.

Speed cutoff is determined by the speed rating of the as delivered O.E. tires.
I don't know what kind of scanner, tuner, or ECU modification will do it, if any?

Have tried one shop and they have no idea or do not want to do b ut is general repair shop not a performance one. Would seem anything programmed in can be programed out.

Find someone with HP tuners or check out hand held tuners

quote:

Originally posted by Goob:
Speed cutoff is determined by the speed rating of the as delivered O.E. tires.
I don't know what kind of scanner, tuner, or ECU modification will do it, if any?

And drive shaft speed limitations. Only difference between some of the Mustangs is the driveshaft; same tires. One has a speed limiter of 122, the other 145.

ForScan can do it, but it only works on Ford. Sucks for the GM and Ram and Dodge guys...gotta use a tuner of some sort on those.

Check on few hand held tunners none adressed the matter. Did not figure would be that simple.LOL

Summit racing has HP tuners mpi3 dongles for sale right now for 399. Buy one, send me a message and i can have you pull the tune, email to me and i go over with you on somethings to do. 2016 will be 1 credit for engine, and 1 credit for transmission. Every Chevy truck transmission i build, gets hp tuned, and im starting to tune all gm cars as well with 6 and 9 speeds. If you would like my transmission tune, then i do charge 250 for that tune, and trust me, YOUR TRANSMISSION WILL LIVE!!!

will check on tuner and if purchase get back to you on tune for transmission.

quote:

posted December 27, 2024 07:51 AM Hide Post
Summit racing has HP tuners mpi3 dongles for sale right now for 399. Buy one, send me a message and i can have you pull the tune, email to me and i go over with you on somethings to do. 2016 will be 1 credit for engine, and 1 credit for transmission. Every Chevy truck transmission i build, gets hp tuned, and im starting to tune all gm cars as well with 6 and 9 speeds. If you would like my transmission tune, then i do charge 250 for that tune, and trust me, YOUR TRANSMISSION WILL LIVE!!!

Jeremiah Hall

i really hate the way my xt4 cadilac trans works,are you able to tune it and would it void warranty

quote:

Originally posted by rusty:

quote:

posted December 27, 2024 07:51 AM Hide Post
Summit racing has HP tuners mpi3 dongles for sale right now for 399. Buy one, send me a message and i can have you pull the tune, email to me and i go over with you on somethings to do. 2016 will be 1 credit for engine, and 1 credit for transmission. Every Chevy truck transmission i build, gets hp tuned, and im starting to tune all gm cars as well with 6 and 9 speeds. If you would like my transmission tune, then i do charge 250 for that tune, and trust me, YOUR TRANSMISSION WILL LIVE!!!

Jeremiah Hall

i really hate the way my xt4 cadilac trans works,are you able to tune it and would it void warranty

6 or 8 speed trans and year? THe answer is yes, but if its an 8 speed, you will need to pull the tcm out of the car, send to hp to have unlocked, then have sent back.

9 speed ,2021 I think

I heard about this tool, like HP Tuners, that can be utilized. These devices allow for modifications to the vehicle's ECU settings, including the speed governor. However, it's crucial to ensure that any changes made are within the safe operating parameters of your vehicle's components.

quote:

Originally posted by rusty:
9 speed ,2021 I think

ah yes the notorious 9t transmission. That can be tuned, but like the 8/10 the tcm has to be unlocked. Yes that transmission is great, once tuned. Ive been waiting on a tcm for my wifes car with that transmission, so i can tune it. But to keep it from shuddering, i have been putting castrol transynd fluid in those, and it takes care of most shudders and cools the trans down some.

quote:

Originally posted by M802138:

quote:

Originally posted by Goob:
Speed cutoff is determined by the speed rating of the as delivered O.E. tires.
I don't know what kind of scanner, tuner, or ECU modification will do it, if any?

And drive shaft speed limitations. Only difference between some of the Mustangs is the driveshaft; same tires. One has a speed limiter of 122, the other 145.

ForScan can do it, but it only works on Ford. Sucks for the GM and Ram and Dodge guys...gotta use a tuner of some sort on those.

GM's only limit is the rating of the tire.

quote:

posted December 30, 2024 12:00 PM Hide Post
quote:
Originally posted by rusty:
9 speed ,2021 I think


ah yes the notorious 9t transmission. That can be tuned, but like the 8/10 the tcm has to be unlocked. Yes that transmission is great, once tuned. Ive been waiting on a tcm for my wifes car with that transmission, so i can tune it. But to keep it from shuddering, i have been putting castrol transynd fluid in those, and it takes care of most shudders and cools the trans down some.

Jeremiah Hal

no shudder here the issue is that once it downshifts it go back to 9th.it will go back with paddle and stay but next downshift stuck in 8th agagain.wil warranty be voided with tune

[/QUOTE]
no shudder here the issue is that once it downshifts it go back to 9th.it will go back with paddle and stay but next downshift stuck in 8th agagain.wil warranty be voided with tune[/QUOTE]

IF they think it caused the issue, than yes. All the local GM dealerships around me knows of my trans tuning, and sends me there used car/trucks to repair transmissions on, and allows me to tune them. And the tuned vehicles also sell faster.

How many miles are on your 9 speed? Has the transmission been serviced? If you plan on doing it yourself, the ONLY KEY FACTOR is to set the trans fluild level between 95-105 degrees. When we service them, we dont hook them up to a machine, we drain and refill 2-3 times with a generic dextron vi fluid, then put transynd in it. I promise you it will fix more than you realize. If you have a scan tool, than you will want to clear shift adapts as well during that time. Being honest, a bad shift adapt could be causing this.

quote:

no shudder here the issue is that once it downshifts it go back to 9th.it will go back with paddle and stay but next downshift stuck in 8th agagain.wil warranty be voided with tune

IF they think it caused the issue, than yes. All the local GM dealerships around me knows of my trans tuning, and sends me there used car/trucks to repair transmissions on, and allows me to tune them. And the tuned vehicles also sell faster.

How many miles are on your 9 speed? Has the transmission been serviced? If you plan on doing it yourself, the ONLY KEY FACTOR is to set the trans fluild level between 95-105 degrees. When we service them, we dont hook them up to a machine, we drain and refill 2-3 times with a generic dextron vi fluid, then put transynd in it. I promise you it will fix more than you realize. If you have a scan tool, than you will want to clear shift adapts as well during that time. Being honest, a bad shift adapt could be causing this.

Jeremiah Hall[/quote]
40000 ,no sercice yet.i made the service manager take riding in another brand new car like mine ,it the same shift pattern.i dont think the car did this when new.i will reset tcm and rethink this.