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need help deciding on axle gear ratio

Discussion in 'The Garage' started by 90BCk5, Sep 9, 2006.

  1. 90BCk5

    90BCk5 1/2 ton status

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    hey guys, i need some help deciding on what axle gear ratio to run ive got a 90 blazer with 38.5x16x16.5 swampers a 241 tcase, 700r4 tranny a stock 350 until im finished building the 360 hp 383... i was thinking that 4.88's would work but if anyone can point me to a ratio calculator or is running somewhat the same setup id be stoked to hear from you! thnaks
     
  2. lamberthkp

    lamberthkp SITFU Premium Member

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  3. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    I have a 350/700/241/4.56 with 35's and wish i had 5.13's.
    My vote with 38's is 5.13's. :thumb:
     
  4. mudbog42

    mudbog42 1/2 ton status

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    I think 4:88's with 38's would work great. I run 4:88's with 35's and it seems I went just a little too low beacuse I turn about 3000 RPMs when doing 75MPH also with a 350 and 700 But does great when off the road:D
    http://www.intercotire.com/site63.php:wink1:
     
  5. muddybuddy

    muddybuddy 3/4 ton status

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    what kind of driving? i run 5.13s with 39.5's and i love it. youve got overdrive, so id definitely go 5.13s
     
  6. broc944

    broc944 1/2 ton status

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    You have overdrive. I highly recommend 5.13's
     
  7. muddybuddy

    muddybuddy 3/4 ton status

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    got any pics of the truck? what axles are you running?
     
  8. 90BCk5

    90BCk5 1/2 ton status

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    sweet

    umm thanks fellas, as for pics not yet, i mean i dont want to show her yet. not ready for the expose... but as for axles, d60 front (w/truetrac, and dually wheel spacers) and a 14bFF ( detroit and discs, and 5" custom 4140 wheel spacers) thanks for the opinions on the gears, 5.13's sound good, ..... pics to follow soon!!!!!:D
     
  9. sandawgk5

    sandawgk5 3/4 ton status

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    Can you post pics of your wheels and spacers on the rear I would like to see how they fit on the hub I am tossing around the idea of a spacer on the rear for HMMVW wheels but I would like to see some first.

    Ira
     
  10. muddybuddy

    muddybuddy 3/4 ton status

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    im also curious bout the wheel spacers.
     
  11. 90BCk5

    90BCk5 1/2 ton status

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    thats not a prob, although it might take me about a week to post the pics as i am about 1500km's from my computer where the pics are. im using the spacers to clear hummer wheels and they work great, got them wide enough so the front and rear wheels are the same width..
     

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