Regearing

[justin ferreira]

I wanted to regear my 2012 silverado but most shops want 2k plus. So I was wondering if I could swap the hole axle and front diff with one's that have the gears I want 

[swathdiver]

Sure can.  From what to what?

[CamGTP]

Yeah, go ahead.

 

But you still have to tune the computer fro the gear ratio change.

[justin ferreira]

Can any dyno shop tune it or could I use one of those hand held tunners

[justin ferreira]

On 12/3/2019 at 12:45 PM, swathdiver said:

Sure can.  From what to what?

From 3.42 to 3.73 or 4.10

[swathdiver]

12 minutes ago, justin ferreira said:

From 3.42 to 3.73 or 4.10

Well, the trick here is to find axles with those gears already in them.  So, if you wanted 3.73 gears, you would look at the old 4-speed SUVs, the 2007-2008 Tahoe, Suburban, Avalanche, Yukon and XL.  Still have to check their RPO sheet as they had more variations then the later models.

 

Now as a plus, you can upgrade your rear axle to the 9.5 semi-floater, RPO AXN, which was found behind RWD trucks with 6.0 and 6.2 motors.  However, most of them will have 3.42 gears.

 

I might do the same thing someday, if I go with a 34" tire or for a little more oompf while towing.  My plan is to change the gears myself but also want to put a 9.5 out back as we also like to drag race and play in the mud with it once in a while.

[justin ferreira]

That’s what I was thinking to find a axles with the gears already in them. I have the 4.8 with a 7.5 inch lift and 22x14s with 33s. I didn’t really want to mess with the gears so I thought swapping the whole axle would be easier.

[CamGTP]

With that engine and tire size you need/want 4.10's at a minimum. I wouldn't even consider 3.73's.

 

Yes, a shop could do the calibration change for you. Or a local person with a tuner, this option may be cheaper.