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71ChevySS(straight6) · 06-26-2015, 02:50 PM

Hello, everybody! Been a while since I posted, but I've got a question for ya. Rear gears. I'm pretty sure I've got 4.11s, I don't have a tach, but I know my six has to rev high to keep 60 MPH, and since I just dropped a couple grand to have it rebuilt, I don't want to work it hard. I don't need the low gearing anymore, I won't be towing or hauling much with it; higher road gears will be more suitable for what I'll be doing. I'm thinking of going to 3.55s.

How difficult will it be for me to do it myself? It's a 1971 half-ton, New Process 435 4-speed. I don't have the truck with me or nearby at the moment, so I don't know exactly what rear axle I have, but maybe with the given information you guys can help me out.

Any help is appreciated. Thanks a bunch!

06-26-2015, 02:50 PM	#1
71ChevySS(straight6) Registered User Join Date: Mar 2013 Location: McPherson, KS Posts: 96	Rear Gears!!! Help please! Hello, everybody! Been a while since I posted, but I've got a question for ya. Rear gears. I'm pretty sure I've got 4.11s, I don't have a tach, but I know my six has to rev high to keep 60 MPH, and since I just dropped a couple grand to have it rebuilt, I don't want to work it hard. I don't need the low gearing anymore, I won't be towing or hauling much with it; higher road gears will be more suitable for what I'll be doing. I'm thinking of going to 3.55s. How difficult will it be for me to do it myself? It's a 1971 half-ton, New Process 435 4-speed. I don't have the truck with me or nearby at the moment, so I don't know exactly what rear axle I have, but maybe with the given information you guys can help me out. Any help is appreciated. Thanks a bunch! __________________ '71 Custom-10 2wd longbed, 250 inline-6, NP 435 four-speed. Medium Bronze Iridescent. Farm truck deluxe. Rat rod build: 1949 Crosley Station Wagon body on 1993 Dodge D350 chassis, Cadillac 500 powerplant.