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Can a hand held tuner change the gear ratio?

frenchsquared

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frenchsquared Enthusiast

frenchsquared

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I really wanted 3:73's in my truck but GM wont put them in the RCSBs. I think I want to just have a shop change them now. Im worried about the computer. it needs to know the gears are lower. Can a hand held tuner tell the system the gears were changed? 

Armo325 Enthusiast

Armo325

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Posted
53 minutes ago, frenchsquared said:

I really wanted 3:73's in my truck but GM wont put them in the RCSBs. I think I want to just have a shop change them now. Im worried about the computer. it needs to know the gears are lower. Can a hand held tuner tell the system the gears were changed? 

I know for sure the Hypertech tuner can.  I'd imagine most other hand held tuners can also adjust your computer for the gear ratio.

 

That said, after doing my share of research (a lot of it on this site), if you're going to spring for the hand-held tuner, it might be worth spending a little more to get a custom tune done.  I plan to regear my truck in the relatively near future and intend to get a Black Bear tune along with the new gears.

frenchsquared Enthusiast

frenchsquared

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2 hours ago, reardiff said:

What gears to you have now, 3.08?

3:42's

 

I will do a custom tune at some point, but not after just gears. MY truck will get headers, exhaust, cat delete and super charger. It will be tuned at that stage. I would not buy one with the 3:08s. 

 

The issue with the custom tune and not having a hand held is you have to keep scheduling dyno time and pay the 250 every time. I want to be able to change tires myself for a one time fee. I don't like paying a tuner $250 for every edit I make not to mention waiting two weeks to get a slot in line. 

Kubs Enthusiast

Kubs

Posted
Posted

Frenchsquared brings up a good point, which give me a question (sorry if it is not related).

 

Can you store tunes in a handheld tuner?  Say you get a custom tune from a dyno, but need to flash back to stock for some reason.  Can you get back to the custom tune in the handheld?

frenchsquared Enthusiast

frenchsquared

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4 minutes ago, Kubs said:

Frenchsquared brings up a good point, which give me a question (sorry if it is not related).

 

Can you store tunes in a handheld tuner?  Say you get a custom tune from a dyno, but need to flash back to stock for some reason.  Can you get back to the custom tune in the handheld?

You can on some of them. I know the multi switch ones can hold more then one tune. I don't know if you can edit that tune. You are right on point. I would want to store the factory tune on the tuner and swap them if my truck needed to go in for repairs. That is until the super charger is added. At that point I will find a way to lock GM out of my ECU.  Something like this: https://www.autocyb.com/

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