9.76” Rear End

[KozzyJr]

Good to know boys. Cus I want to change to 3.73 when tuning is available for the new 6.2s I feel a whipple coining sometime soon ?

[Jacksfan98]

Nice work fellas! Thanks for answering the question! 

[GMC Ryan]

I have a Sierra AT4 with the 3.0L Duramax and it is also stamped 9.76 on the rear diff.

[ullose272]

I have a Sierra AT4 with the 3.0L Duramax and it is also stamped 9.76 on the rear diff.

Interesting i will have to look at mine, i was wondering about the 3.0

Sent from my SM-G973U using Tapatalk

[pewterliftedz]

On 3/19/2019 at 2:29 PM, KozzyJr said:

Good to know boys. Cus I want to change to 3.73 when tuning is available for the new 6.2s I feel a whipple coining sometime soon

You don’t really need tuning to change the gears, it would be the same as adjusting the speedo for tire size.  I believe companies have already come out with his those.  Also GM does make 3.73 gears for the 9.76, they come in the Diesel Off Road Package 3.0 trucks

Edited July 17, 2020 by pewterliftedz

[UgLee]

I have a 2020 Silverado 1500 3.0 Baby-Max, I specifically got it with the "Diesel Off-Road" package.  This package gets the 9.76 12bolt and 3.73 gears as well as some other fun stuff.

[kendoe]

On 3/18/2019 at 8:47 PM, Jacksfan98 said:

Here is the picture 

I have this same rear diff. I'm having problems getting the right 3.73 heavy duty ring and pinion. If anyone answers please comment

 

[SierraStorm21]

On 9/15/2024 at 4:45 PM, kendoe said:

I have this same rear diff. I'm having problems getting the right 3.73 heavy duty ring and pinion. If anyone answers please comment

 

I've been doing some searching as well. Posts here and on other forums led me to these guys. I'm not quite ready yet, so I haven't reached out

https://eastcoastgearsupply.com/c-1206391-gears-install-kits-carriers-spider-gears-general-motors-gm-9-76-12-bolt-ring-pinions.html