Rear end gears

Nasty · April 27, 2018

In my 16. I have the 342 gear. I want to go to a 373 or 410. If I do swap them will I have to get my tuner to adjust anything becsuse of it or no. I can swap them and be on my way

silveradosid · April 27, 2018

yes you will have to get it tuned or buy a tuner

WesternMike · April 28, 2018

In my 16. I have the 342 gear. I want to go to a 373 or 410. If I do swap them will I have to get my tuner to adjust anything becsuse of it or no. I can swap them and be on my way

What size tires do you have; why the change of gears?

Nasty · April 28, 2018

11 minutes ago, WesternMike said:

What size tires do you have; why the change of gears?

275 60 17 but I'm changing to a 295 65 15 in the rear

I need lower gears when I do my circle d converter. Not need. But more of a want. These 342 are meh

WesternMike · April 28, 2018

Yeah that’s what I have in mine now, once I throw 35s on I’m also swapping to 4.56 and doing Yukon’s diff rebuilds.

Going with Yukon for the gears?

Big Whiskey · April 28, 2018

Yes, you'll need to re-program/tune after a gear ratio change. And, if you're going through the process, changing from 3.42 to 3.73 won't be enough change to justify the cost. I'd go with at least a 4.10, if you're committed to a gear swap. Might as well get your moneys worth, haha.

Nasty · April 28, 2018

12 hours ago, WesternMike said:

Yeah that’s what I have in mine now, once I throw 35s on I’m also swapping to 4.56 and doing Yukon’s diff rebuilds.

Going with Yukon for the gears?

Not quite sure yet. As I'm not sure of to many that are out yet. I know Yukon makes them but not sure if anyone else does yet

Armo325 · April 28, 2018

2 hours ago, Nasty said:

Not quite sure yet. As I'm not sure of to many that are out yet. I know Yukon makes them but not sure if anyone else does yet

There are quite a few brands out there for the 2014-2018 truck. As I have done my research, I've learned that basically all of the brands are using the same gears (made in South Korea) with very minor differences after they are manufactured. Along with Yukon, I have looked at G2, Nitro and AAM. It's hard to find definitive differences from one gear to the next. There are tons of folks talking about how great their own setup is but a lot of them haven't put a ton of miles on those gears, either.

I plan to swap out my own gears relatively soon. I continue to read what I can about the different gears but, for now, plan to install AAM 4.10 gears in the front and back to replace my stock 3.42s.

Nasty · April 28, 2018

I did see Aam now that you mentioned it. I'm going to look into those

WesternMike · April 28, 2018

Heard Yukon and g2 are the way to go, but as previously mentioned; all very similar.

Armo325 · April 28, 2018

7 minutes ago, WesternMike said:

Heard Yukon and g2 are the way to go, but as previously mentioned; all very similar.

I have heard the same. I am leaning toward AAM only because they are "OEM" gears and said to be the quietest of the bunch, which like. The down side to them are the available ratios - AAM doesn't make anything that I'm aware of beyond 4.10 for GM trucks.

For the folks that want to go to 4.56 or 4.88, for example, AAM is out. For those ratios, G2 and Yukon seem to be the overwhelming favorites.

WesternMike · April 28, 2018

I have heard the same. I am leaning toward AAM only because they are "OEM" gears and said to be the quietest of the bunch, which like. The down side to them are the available ratios - AAM doesn't make anything that I'm aware of beyond 4.10 for GM trucks.

For the folks that want to go to 4.56 or 4.88, for example, AAM is out. For those ratios, G2 and Yukon seem to be the overwhelming favorites.

You bet! I’m with Yukon as I want the 4.56 on my truck build I’m doing. From what I’ve read around the web and spoke to some friends about; Yukon is a safe bet no matter what your after!

Nasty · April 28, 2018

Looking at final rpm I may just go a 373. And aam looks good. I'm most likely going with them

Truckerado · April 30, 2018

went from 3.08's to Yukon 4.10's and a custom tune...bye bye v4 mode... money well spent.

Big Whiskey · May 1, 2018

8 hours ago, Truckerado said:

went from 3.08's to Yukon 4.10's and a custom tune...bye bye v4 mode... money well spent.

Man, I bet that's like driving a whole new truck! I wanted 4.10's and no V4 mode, so I just bought a 2500HD, haha. I'm sure yours rides smoother and gets better MPG though.