4.56 Gears Installed

[JennaBear]

Gears are a great upgrade on these heavier vehicles. Wish they offered more options from the factory. Debating on changing mine on the Nali after we did new gears on the Blazer (4.56).

 

[fco_gonzo]

I would recommend it. I can't give you real numbers other than I can feel the difference when I press the gas. I am having to relearn my gas peddle because I find myself going faster than I should cause it much quicker and it's feels much lighter. I know it doesn't make sense but I've been driving my Tahoe since nov '06, and I can tell difference from then and now.

 

[Zed 71]

I know it doesn't make sense but I've been driving my Tahoe since nov '06, and I can tell difference from then and now.

Oh I believe it. Back then I test drove the 4.10 (which I bought) versus the higher geared ones and there was enough of a difference.

I know off topic, but how do you like the rear Rancho 9000XLs? I am close to needing new shocks and I am looking at the Rancho 9000XL, Rancho RS7000MT, and Bilstein 5100s.

 

[fco_gonzo]

They are ok, I'd prefer something more heavy duty such as king shocks.

 

[JennaBear]

Trying to talk Justin into king for his silverado.

Sent from an ice cream sammich.

 

[fco_gonzo]

Last time I checked I was going to pay about $2500 for fronts and rears (king shocks), a little too much for me. But if I hit the power ball I might go for it, lol.

 

[Blazed]

What is so good about king shocks?

 

[enypde]

The 4.56 is a great choice. I also regeared mine to a 4.56 and from the stock 3.08, the difference is huge. My fuel economy actually went up when going from stock to 4.56, I now get nearly 20mpg on long highway drives, and an easy mid 16 around town.

How much that run ya. I might be looking to do the same.

 

[CrankCase]

How much that run ya. I might be looking to do the same.

I was right at $1200 parts and labor for the gears. Got my gears through G2 axle and had them installed at my local Chevrolet dealer. The driveline guy there is top notch so I trust him. I would recommend having someone do them that has does them on a regualr basis, such as a 4x4 shop.

Which brand of gears you buy do make a difference. Some make more noise than others. I found that Yukons make the least noise, and Superior make plenty of noise. I have Yukons in mine and there is still a slight 'whine" at speeds, but nothing that is overwhelming. If I have the radio off, and its a perfectly smooth surface, I might be able to pick it up. I had Superior gears in my Super Duty, and could hear them almost all the time, I swapped them out with Yukons less than 6 months later.

The noise is just part of the gear metals being different from the factory stuff. And with an SUV's enclosed cab, the noise will sometimes echo.

 

[Blazed]

Why don't you just get OEM gears?
If you're getting something they offer like 3.73s or 4.10s