The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 454 Dually with 4.56 rear diff, what auto trans to use

SunSoaked · 12-21-2021, 02:31 PM

Gear swap is a tradeoff.

You have a BBC in a Squarebody truck. Erase the notion of "gas mileage" from your vocabulary.

4l80 or NV4500 swap. Best of both worlds. Pick your poison. I been there done that.

I LOVE my 4:56 gears behind my 4500. Buy once-cry once.

12-21-2021, 02:31 PM	#5
SunSoaked Registered User Join Date: Dec 2011 Location: Yuma Arizona Posts: 1,524	Re: 454 Dually with 4.56 rear diff, what auto trans to use Gear swap is a tradeoff. You have a BBC in a Squarebody truck. Erase the notion of "gas mileage" from your vocabulary. 4l80 or NV4500 swap. Best of both worlds. Pick your poison. I been there done that. I LOVE my 4:56 gears behind my 4500. Buy once-cry once.