« Reply #15 on: June 17, 2017, 12:40:25 PM »
4.11:1 or 4.56:1 would be ideal for those final gears.
I've got 35s on my V3500 with a 4L80e. I have 4.11s for gearing and I can say that I am on the fence about 4.56s. I could easily go to them as my truck barely kicks into overdrive and then locks up the converter at about 65 MPH, but I do like the low RPMs on the highway at speed! Food for thought Halogin13.
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-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6