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Old 08-11-2013, 03:10 PM   #9
tjsblazer
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Join Date: Oct 2009
Location: Great White North
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Re: Stock 3.73 or 3/4 ton 4.10 axles

Quote:
Originally Posted by Tony454 View Post
Honestly I'm planning to do a four inch lift and 33's. I'm thinking the k5 will have better highway manners with the 3.73's. and also planning to run an o/d trans so getting the rpms down a little more for that would be good. Thanks for the input, it reaffirmed what I was already kinda leaning towards.
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Make sure you run the numbers through a gear ratio calculator and ensure your cruise rpm match your engine. Don't know what OD tranny you are planning on installing but the popular ones are 700r4 in an auto and nv4500 in a manual.
On 33 inch tires at a 60 mph cruise with 3:73 gears the 700r4 would turn 1595rpm and the nv4500 would turn 1709rpm. Bumping up to 4:10 gears would raise the rpm to 1753 and 1879 respectively. Will your engine run happy in your truck cruising in these ranges.
Run different numbers yourself at
http://www.grimmjeeper.com/gears.html
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