rear end gears
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Joined: Dec 1999
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From: Copley, OH
rear end gears
With a 3 speed, you don't have a lot of options. Your 3rd gear is 1:1 os for decent highway RPMs you want a 3.08 which give you about 2400 RPM @ 65 or even a 2.73 which drop it to about 2150.
Since your 1st gear isn't very deep, neither of these gears have any acceleration, performance or hauling capability. A set of 3.55s or 3.73s would be much better for a working truck but you'd end up pulling 2750-3000 RPM @ 65 depending on tires.
If you go with something in the middle like 3.27s or 3.31s you'll still be turning about 2550 @ 65
Since your 1st gear isn't very deep, neither of these gears have any acceleration, performance or hauling capability. A set of 3.55s or 3.73s would be much better for a working truck but you'd end up pulling 2750-3000 RPM @ 65 depending on tires.
If you go with something in the middle like 3.27s or 3.31s you'll still be turning about 2550 @ 65
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Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
rear end gears
tetraruby
You can see my truck specs in my profile, and more in my sig link. I'm going back to 3.08s because I do have a granny gear AND a transfer case with low range (so I don't have a torque problem), but I don't have OD, so the 3.55s I'm running temporarily just won't get me up to the speed I like.
I can't even peg the speedometer any more. 
You can see my truck specs in my profile, and more in my sig link. I'm going back to 3.08s because I do have a granny gear AND a transfer case with low range (so I don't have a torque problem), but I don't have OD, so the 3.55s I'm running temporarily just won't get me up to the speed I like.
I can't even peg the speedometer any more.
Last edited by steve83; Mar 1, 2003 at 07:52 PM.
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Senior User
Joined: Mar 2002
Posts: 147
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From: USA
rear end gears
thanks for the advice. I will probably just keep things the way they are and keep the work load down on it. It will mostly be used just for commuting anyway, and I could use the lower rpms for better fuel mileage with the way gas prices are going up where I live. I have put some decent loads on it and it has done alright, not the greatest, but it has gotten the job done and that is all I need for right now.
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