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

b454rat · 12-29-2021, 08:47 AM

Id think you could go with the 4L80 for less than $3k. The controllers are around $500, trans is all how good you are at finding stuff. Local yard has em for $350. Duno what t-case you have, but there is info out there to adapt to any t-case. This way, you still have the power to pull whatever, and be able to cruise on the highway over 55mph.

12-29-2021, 08:47 AM	#10
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,453	Re: 454 Dually with 4.56 rear diff, what auto trans to use Id think you could go with the 4L80 for less than $3k. The controllers are around $500, trans is all how good you are at finding stuff. Local yard has em for $350. Duno what t-case you have, but there is info out there to adapt to any t-case. This way, you still have the power to pull whatever, and be able to cruise on the highway over 55mph.