|
Re: 454 Dually with 4.56 rear diff, what auto trans to use
My '90 K30 3+3 454 got the best mileage @ 55 because of no overdrive (and made a big difference), a 4L80 would've been ideal for it.
I don't believe the minor difference of changing from 4.10 to 3.73 is cost effective - EVER ! (unless you drive coast to coast frequently)
__________________
Tim K.
84 K30 srw Silverado 454 auto
85 C20 350 C6P auto flatbed
94 K1500 lifted shortbed 350 4 bbl NV4500
Last edited by 68post; 02-09-2022 at 03:37 PM.
Reason: more
|