So I have a 2010 Denali 6.2 awd 3:42 gears and Im thinking of doing a gear change to 4:56 but Im not sure if it can be done without spending big dollars to do it. I know that 4:10s can be done but was hoping for the 4:56 as I have a 35 foot travel trailer that I tow Any information would be great

Thanks Guys

 

4.56 costs the exact same as 4.10.

No carrier breaks worth noting.

4.88 runs into some tuning issues (CEL ABS) but 4.56 is 100% tunable.

 

Do Denalis have a 10 bolt? if so, you can get a package deal from Ron's for probably $500 or less, then get quote from local installer, I'm guessing in the range of $750-1200 for labor. 4.10 and 4.56 shouldn't cost any different from each other, just depends on gear brand choice and local labor rates.

 

I have 4.88 in my 2010 silverado from 3.42 and there are not abs or any other codes. If you have a 10 bolt in the back and 8.25 in the front make sure you get the correct pinion head bearing for the rear diff and the carrier locks for the front diff. Those things changed on the newer trucks.

 

07+ Denalis come with 14 bolt diff

 

Only vmax's get 14 bolt semi floater. Denali's get dinky 10 bolt.

 

Are u sure man? Because my denali came with a 14 bolt pretty sure all nnbs denalis come with the same

 

And think the awd denalis come with a 10 bolt

 

my 08 denali 2wd has a 14bolt semi float, and every nnbs denali ive seen has had the same.

 

Thanks for all the responses guys I guess I will have to go out and loo to see if it is 10 or 14 bolt and then try and find all the parts and pieces needed to get 4:56 gears in it