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Thread: Better gearing for large tires

  1. #1

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    Better gearing for large tires

    Hey guys I have a 82 d50 4x4 with a rebuilt 2.6. I currently run 3513.50r15 tires with a mild body lift and cut out fenders. I have already done the montero gear swap with 4.625 gears, but now I am wanting more. Has anyone tried a 2x4 transmission with a devoirsed case? How about the lower gears from marks4x4 out of Australia? Could anyone tell me what our stock tcase gears are? Please help. I use my truck for deep snow wheeling and of course I always wanna go just a little further.

  2. #2



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    the steepest gears I ever saw for our axles were 5.13, but I don't remember where I saw them. You may also want to do some power adders to the 2.6, like a turbo or supercharger, with a cam and exhaust.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    Yeah 5.13 gears would be great if you can remember where I can get some at. However all of my wheeling is done at low speeds and low rpm. Our stock cams give us the best low end torque and a turbo wouldn't spool up until higher rpms. Thanks for you input tho.

  4. #4

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    There's another gent in Australia with 5.86 gears for the 4-cylinder axles. Other easier options, like an Atlas t-case.

  5. #5

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    How do I look this guy up with the 5.89 gears? A 2 wheel drive transmission with an atlis would be good but also very expensive. If i could just buy gears I would. I have also thought about doing an sas with dana 44s . I just want to do the most cost effective route

  6. #6



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    Bigger tires will make your speedometer change the actual speed that your going. So bigger will say your doing less then the actual speed of the truck. I think they have gears that sub this stuff though.

  7. #7

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    Yes lol, I understand that bigger tire will change my speedo....however I don't care about my speedo. I am looking for a better crawl ratio. With 4.625 gears and 35s my speedo (according to gps) is only about 1 mph off at 60 mph. Thanks for your input and I am not trying to be rude. I just want to crawl even slower to stay on top of the snow and i don't really care about road manners. Thanks guys keep the ideas coming

  8. #8

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