The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - C30 dually rear diff gearing options help please

Big Chip · 12-29-2021, 10:56 PM

I have 3.73's in mine and she's a screamer at today's highway speeds. I have a 4L80 for mine that I haven't installed yet but I'm hoping that helps somewhat. Other than that I'd say GV would be the way to go.

12-29-2021, 10:56 PM	#4
Big Chip Registered User Join Date: Oct 2017 Location: Roscommon, Michigan Posts: 100	Re: C30 dually rear diff gearing options help please I have 3.73's in mine and she's a screamer at today's highway speeds. I have a 4L80 for mine that I haven't installed yet but I'm hoping that helps somewhat. Other than that I'd say GV would be the way to go.