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  • jim79cj7
    replied
    CHOICES ,CHOICES ,CHOICES

    Well running a V8 , you have an advantage over the average jeeper . You have the power to leave in the 3:73s and yes a 4:1 gearbox would get you where you want to be in 4wd , 4:10's would be a slight power increase they are not that far away from the 3:73's to make "a world of difference " . 4:56's would be the difference you would really feel . keep in mind that a 3:73 is ALOT stronger than a 4:56 gear and with the v8 you will have the power to break gears . MY personal opinon would be to go with a 4:10 gear set . you will gain a LITTLE mileage increase and a Little power increase without compromising strength . :confused:

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  • igofshn
    replied
    Originally posted by Trailbst
    Here is my opinion, for what it is worth.

    Go to someplace like Dirtroad.com or Randys Ring & Pinion. Use one of the calculators to find the right gear to match the RPM that you want.

    We can sit here and speculate for weeks. If you use the calculator, it will want to know your tranny gear ratio, your t-case gear ratio, the MPH you want to travel at, and the RPM that you want to be at for that speed. Then it will do it's magic and let you know what is the correct gear ratio for your setup. I honestly don't think any of us have the exact combination of driveline components that you do, so we can't honestly answer which is the best for your rig. Although we will give it one heck of a try.


    erik
    Those things don't work for automatics....

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  • Guest's Avatar
    Guest replied
    Here is my opinion, for what it is worth.

    Go to someplace like Dirtroad.com or Randys Ring & Pinion. Use one of the calculators to find the right gear to match the RPM that you want.

    We can sit here and speculate for weeks. If you use the calculator, it will want to know your tranny gear ratio, your t-case gear ratio, the MPH you want to travel at, and the RPM that you want to be at for that speed. Then it will do it's magic and let you know what is the correct gear ratio for your setup. I honestly don't think any of us have the exact combination of driveline components that you do, so we can't honestly answer which is the best for your rig. Although we will give it one heck of a try.


    erik

    Leave a comment:


  • DrewTJ
    replied
    That's a point, I am driving a stick. However, unless you are driving highway daily I would still go lower gearing. Again percentage wise it just seems like a waist to go from 3:73 to 4:10s.
    In 4th gear at 65 I'm at about 2400 RPM, so I still say err toward lower gears IMHO.

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  • tonkadave
    replied
    Hey drew are you running a manual or auto? Because with an auto. the torque converter is a multiplier. I had a friend who was running 5.13 with his 5 speed and 35 in. tires he suffered on the hwy but excelled off road.

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  • DrewTJ
    replied
    I had stock 3:73s and just went to 4:56s it is now perfect for driving around town and I finally got 5th gear back on the highway, along with MUCH better gas mileage.

    IMO going from 3:73 to 4:10 is not gonna do it, % wise it is negligable, its a waiste of money to go with any higher gearing than 4:56s. I wish I had gone 48s even and I only run 33s. Just my .02

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  • PRegner
    replied
    I would think about leaving the 3.73:1's in the pumpkins, and going with a Teralow-300 4.0:1 gear set in the transfer case. That way it will remain decent as a daily driver, and give you some creepy gearing for wheeling...

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  • igofshn
    replied
    With an auto, I would go 4.10. Rpm's will be way too high with 4.56's. I run 4.10's with my 3 speed auto and it turn 3000 at 70.

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  • Tazdevil
    replied
    I would go with the 4.56 I am running the 4.10 now and will probably go to 4.88. The milage will not be that much better with 4.10. Just my thoughts.

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  • tonkadave
    started a topic which gears

    which gears

    OK here's the run down.. I'm running with a chevy 350 engine and TH350 auto trany matted to a Dana300 t-case with full size chevy blazer axles D44 front and GM 12 bolt rear with stock 3.73 raito, and 35in. tires. I been wanting to swap in some 4.10/4.11 gears This is my DD also and my gas milage isn't the greatest right now anyway like 8-10 MPG. but back to the question should I go with 4.10 or 4.56's?
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