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RockWell 2.5 ton axle

Discussion in 'OffRoad Design' started by James90, Feb 6, 2001.

  1. James90

    James90 1/2 ton status

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    what do you thank about useing rockwell 2.5 ton in a blazer that will have high HP and 40" tires or biger?

    I know that they have 6.72:1 in them so what kind of tranny would I need to use and would a doubler work with them?

    i know you can put disc brakes on them and new crmoly houseing for them to cut down on wight would it be worth it to do this?

    thanks for you time!

    [​IMG]Go prepared

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  2. Rebel88

    Rebel88 1/2 ton status

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    Rockwells are top loaders correct? That means that they have the built in doubling that comes with a top-loading axle. I would go with the strongest I could find depending on whether auto or not. Like a th400. Also a strong t-case. What is this truck for mud or show or what? That dictates some of what your decision should be.

    Later

    Have you driven OVER a Ford lately?
     
  3. James90

    James90 1/2 ton status

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    they are top loading double reduction axles it will most likely be use for mud but I would like to try some rock crawing I also would like to show it if I can keep some sheet metal on it

    I was also thanking that them being top loaders would hepl with my pinon angel

    [​IMG]Go prepared

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  4. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    I'm not much of an expert on the axles, but I've seen some pretty heavy rigs running bigger tires than that on them, so I would guess you'll be ok with them. You'll probably still need to look into an overdrive tranny with that low of a gear ratio. I don't think the axles are a double reduction, i think it's a straight 6.71:1 ratio. You would have to really research the front driveshaft, you could end up with some interference to the motor if you're not careful, and determine how much lift just putting the housings in there will add. Probably at least 6" or so.
    Gut feel from me: BOLT IN a GM 60 and a 14 bolt and go from there. The custom work and effort involved in putting in the 2.5 ton's isn't worth it for most guys.
    The other guys on this post hit the nail on the head, figure out your intended use first, if the extra cost, effort, etc is worth it, go for it, but it's so easy to bolt in GM 1-ton axles that it's hard to argue with them.

    Making the world better, one truck at a time.
    [​IMG]
    SW-ORD
     
  5. ken

    ken 1/2 ton status

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    Good point, Stephan, but actually the lowest you can go gear wise in a 14 bolt is 5.13. Better to go to a Dan 70 rear, and 60 front. I believe you can get all the way down to 7.17 gears, and you can get shafts made that are much stronger than the Rockwell 2.5 ton's 1 5/8"ers. How bout some 1 3/4" x 40 spline shafts, like I got in the 60 rear in my Jeep CJ8...much stonger than a Rockwell 2.5 ton's.

    ken
     
  6. James90

    James90 1/2 ton status

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    guy thank for the info

    I thank I may look in to the dand 60/70 combo

    and you yall know any thing about the 4L80E OD auto tranny/

    [​IMG]Hail To The King

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