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Old 06-27-2015, 12:57 PM   #17
71ChevySS(straight6)
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Join Date: Mar 2013
Location: McPherson, KS
Posts: 96
Re: Rear Gears!!! Help please!

Quote:
Originally Posted by RichardJ View Post
I think the 3.55 you mentioned would be a better choice than 3.08 for a stick with small engine.
Automatics can generally handle taller gears and that is what some of these guys have in mind with that recommendation.
The chart below is from an Off-road web site so you can take it for just a comparison reference only.
They put 3.07 gears at the bottom of the useful range and even then only with a 28" tire which is a pretty small truck tire.

Personally I think even for KS, your 250 would struggle with hills, head winds and much of a load with 3.07 gears.

I swapped the 4.56 gears for 3.54 gears in my truck. The most noticeable bang-for-the-buck on my truck next to AC. 75 on the hwy and can handle most hills without straining.
Thanks for your help!
__________________
'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.
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