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Thread: Opinions on the Ford 8.8" for rear end swap

  1. #61
    Registered User sterling's Avatar
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    Negative on not using 4wd.... I live in New England. The snow up here can be tought to navigate without 4wd.

    I will probably go the 8.5 route.
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  2. #62
    Senior Member bigjsp's Avatar
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    Originally posted by sterling
    Negative on not using 4wd.... I live in New England. The snow up here can be tought to navigate without 4wd.

    I will probably go the 8.5 route.
    At the risk of criticism has anyone ever really calculated how much difference say 3.40 vs 3.42 a small gear ratio differnce is in terms of tire height, and examined the tire heigth differences on a normal 4wd.

    Most people only put it in 4wd when there is snow on the roads anyways.

    Just thinking out loud ........ before you blindly follow the safe advice

  3. #63
    I'm BATMAN! Harley's Avatar
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    Originally posted by BlazerINtheWork
    as far as the 8.5 goes, tippmann hit it on the head. i've also looked around for an 8.5 alot, and they are pretty rare around here. the ones i do find are bone stock and $600.
    And i found one a half hour away from you and drove off with it haha.

    To get an 8.5 you pretty much have to buy your truck with it already because they are so rare and expensive. And finding a truck with it is even harder. It isn't really clear what options come with the 8.5 or if they always come with the 8.5. All the blazers with a manual (M50) and the g80 I have looked at had the 8.5, but I can't guarentee they all will.

    Also I know some guys with high power experiance aren't completely sold on the 8.5's strength. I believe I have heard Big say he won't invest in one until they have been proven more.
    Last edited by Harley; 03-02-2006 at 02:00 PM.
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  4. #64
    Registered User sterling's Avatar
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    Originally posted by bigjsp
    At the risk of criticism has anyone ever really calculated how much difference say 3.40 vs 3.42 a small gear ratio differnce is in terms of tire height, and examined the tire heigth differences on a normal 4wd.

    Most people only put it in 4wd when there is snow on the roads anyways.

    Just thinking out loud ........ before you blindly follow the safe advice
    No crticism here.... It is definitely something to look into for someone who is an occasional 4x4 user. I venture off road with my rig in addition to forging through snow, so I would rather keep tire sizes the same all around. The available options to keep the 3.42 gearing seem slim. 8.5", shortened 12 bolt, ???
    1993 GMC Sonoma
    4x4 5 Speed Manual
    5.7L Vortec V8 with TBI

  5. #65
    Zombie Killer 6SpeedBlazer's Avatar
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    how about 3.73's front and rear?

  6. #66
    Registered User sterling's Avatar
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    I thought 3.73 was a GM gear ratio? Can you get a set of 3.73 gears for an 8.8" rear? I am not a ford guy so i don't know much about them.....
    1993 GMC Sonoma
    4x4 5 Speed Manual
    5.7L Vortec V8 with TBI

  7. #67
    Zombie Killer 6SpeedBlazer's Avatar
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    Originally posted by sterling
    I thought 3.73 was a GM gear ratio? Can you get a set of 3.73 gears for an 8.8" rear? I am not a ford guy so i don't know much about them.....
    yes ford offers 3.73

  8. #68
    Registered User Boomin Boy's Avatar
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    3.73s were also very very popular in the explorers stock

  9. #69
    Senior Member bigjsp's Avatar
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    Originally posted by bigjsp
    At the risk of criticism has anyone ever really calculated how much difference say 3.40 vs 3.42 a small gear ratio differnce is in terms of tire height, and examined the tire heigth differences on a normal 4wd.
    well the answer is less than 1% .............. I will assume a 28 inch tire---------- which in terms of tires means that your effective radius's on the bottom side front versus rear tires tire should be no difference than 14" +/- 0.14" ( approx 1/8 ")


    Now check your normal tires and be prepared.............

    now vary the air pressure and measure versus your effective tire radius.



    If all else fails buy some bravada parts adn make it an AWD then you have fluid couplings to compensate front to rear differences

  10. #70
    It's all about to change winditup57's Avatar
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    Originally posted by bigjsp
    well the answer is less than 1% .............. I will assume a 28 inch tire---------- which in terms of tires means that your effective radius's on the bottom side front versus rear tires tire should be no difference than 14" +/- 0.14" ( approx 1/8 ")

    You think too much....lmao













    nah..I admire your thought process that you put into everything you do!! :bigthumb:
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  11. #71
    Zombie Killer 6SpeedBlazer's Avatar
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    Originally posted by bigjsp
    well the answer is less than 1% .............. I will assume a 28 inch tire---------- which in terms of tires means that your effective radius's on the bottom side front versus rear tires tire should be no difference than 14" +/- 0.14" ( approx 1/8 ")


    Now check your normal tires and be prepared.............

    now vary the air pressure and measure versus your effective tire radius.



    If all else fails buy some bravada parts adn make it an AWD then you have fluid couplings to compensate front to rear differences
    you made my brain hurt

  12. #72
    Search Button Mod BlazerINtheWork's Avatar
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    just a heads up. ranger rears, anyone check those out yet? one came up for sale locally, measured out to be 54''.
    Originally posted by Baggd2DaXtreeme
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  13. #73
    Zombie Killer 6SpeedBlazer's Avatar
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    they run 8.8's but they run a smaller axel and a lower spline count if i remember correctly

    ive never measured one though, i may have to pull one apart at the yard and see for myself and take down some measurements

  14. #74
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    every ranger that came in our shop never had posi, might be hard to find idk.
    Last edited by Superbee; 03-06-2006 at 01:58 PM.


    89' S10 blazer 4wd: 355, 650 dp, rpm intake, comp 282 roller cam, modified vortecs, T56 Six speed, 8.8 ls rear, headers, x-pipe, spintech pro street mufflers, and......AC

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  15. #75
    Zombie Killer 6SpeedBlazer's Avatar
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    :ohno: open diffs make me sad

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