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Thread: 4.56 gears?

  1. #1
    Big Baller 85cj7's Avatar
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    4.56 gears?

    can i run 4.56 gears in a dana 30 and amc 20
    i have a 85 cj7, 1990 ford 302 H.O E.F.I engine, no locker in front, want a detroit in rear, 33"s now eventually no larger than 35"s, won't my rpms be threw the roof at highway speeds?

  2. #2
    D-FENS agjohn02's Avatar
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    transmission?

  3. #3
    Big Baller 85cj7's Avatar
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    sorry, t-176, manual, oh and i also have moser 1 piece axles in the amc 20

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    Yea it'll be up there. Plenty of people run like that. The 5.0 won't care, your fuel may care, but with the highish low in the t176 the 4.56 would be nice offroad.

  6. #6
    Big Baller 85cj7's Avatar
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    well if i decide to go with the 4.56 i won't need your gears kopeki but i'll take all the rest expecially the open carrier, will it work with the 4.56 gears.

  7. #7
    Rock and Roll AggieTJ2007's Avatar
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    I ran 4.56's with 33's and still do, I love them lots of power and still reasonable on the highway even at 75 or 80
    Quote Originally Posted by afroman006
    Creighton, you have done stuff with that jeep that would make a goat go "holy ****!"
    Quote Originally Posted by afroman006
    So driving by brail is why your jeep looks the way it does eh?

  8. #8
    Registered User robertf03's Avatar
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    Quote Originally Posted by AggieTJ2007
    I ran 4.56's with 33's and still do, I love them lots of power and still reasonable on the highway even at 75 or 80

    you have overdrive

    I'd go with 4.10's

    I didn't like 4.56's in mine with the v8 and 36"s. revs a little too high on the highway.
    ...

  9. #9
    wash, rinse, repeat. sasquatch's Avatar
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    Quote Originally Posted by robertf03
    you have overdrive

    I'd go with 4.10's

    I didn't like 4.56's in mine with the v8 and 36"s. revs a little too high on the highway.
    very true. i think 4.56s are a little much for 33-35s. hell i have 35s and 3.50s and everything works great, but my motor is quite a bit more powerful, at least on the low end. what do you have now?

    1976 F-100 Kustom Krawler
    1976 F-150 Custom
    1964 CJ5

  10. #10
    Big Baller 85cj7's Avatar
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    the ford 302, 225hp, probobly the same in torque

  11. #11
    Big Baller 85cj7's Avatar
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    the reason i specifically ask 4.56 even though i know they may run high is because of this
    http://cgi.ebay.com/ebaymotors/ws/eB...MEWA:IT&ih=003
    i think its a good deal if the bid stays low, under 200?

  12. #12
    D-FENS agjohn02's Avatar
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    ive got 4.27's and 35's. in 3rd gear (1:1) it runs too high for my liking(~3000rpm). in OD it runs about 2200.

  13. #13
    wash, rinse, repeat. sasquatch's Avatar
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    Quote Originally Posted by 85cj7
    the ford 302, 225hp, probobly the same in torque
    i meant gears. doubt it on the torque... i have 327 ft lbs stock and theres a low end cam in my motor.

    1976 F-100 Kustom Krawler
    1976 F-150 Custom
    1964 CJ5

  14. #14
    Rock and Roll AggieTJ2007's Avatar
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    don't be a *****, you can always sacrafice highway driving for off-road ability
    Quote Originally Posted by afroman006
    Creighton, you have done stuff with that jeep that would make a goat go "holy ****!"
    Quote Originally Posted by afroman006
    So driving by brail is why your jeep looks the way it does eh?

  15. #15
    Big Baller 85cj7's Avatar
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    right now i have the stock 2.73 gears, going 70 i only run like 1800-2000 rpms now, great gas milage but c**p off-road

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