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Thread: 40ís on a PR44?

  1. #1
    Been Around the Block RageKage's Avatar
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    40ís on a PR44?

    So this could constitute some heckling I know. But I have been looking at Dynatracís Trail Leader package (PR44 up front, ARB, 5.13s with shafts, gears, and locker for the rear to match) my question is if I was to gusset (possibly truss) the axles would they be able to confidently hold the weight of 40ís? I donít do any type of serious or crazy trails mostly dirt roads with light bumps, rocks, and obstacles, and it will probably stay that way for the foreseeable future. Really just want 40ís for the look and will be upgrading axles anyways as I have 37x12.50x18 Nitto Trail Grapplers on a D30 with stock gears (I know, Iíve heard all the heckling before, wasnít as educated when I made that decision as I am now) I wouldnít say Iíve babied my jeep, but I am fully aware of the consequences of this setup if I was to play too hard, but it has been doin fine for a little over 4 years now. Looking at Cooper STT pros 40x13.50x18. Any input is appreciated, and Iíll even accept the heckling and jokes that come along with it. Thanks guys.


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  2. #2
    Old Timer fiend's Avatar
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    40ís on a PR44?

    Friend of mine running 40s on a 44/PR44 combo recently popped his rosette welds and spun his rear differential. So you can look forward to that risk.

    Also increased risk of bent axle flanges and prematurely toasted unit bearings.

    To turn those wheels youíll want 5.38s, which means a tiny pinion gear and probable ring and pinion failure.

    Why not just save another $6-8k and go with a 60/60 package?

  3. #3
    Old Timer TrainWreck618's Avatar
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    Thereís a reason guys upgrade to 1 tons when going to 40ís. If you could do it with less everyone would be doing it.


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  4. #4
    Nothing but a Thing
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    Quote Originally Posted by RageKage View Post
    So this could constitute some heckling I know. But I have been looking at Dynatracís Trail Leader package (PR44 up front, ARB, 5.13s with shafts, gears, and locker for the rear to match) my question is if I was to gusset (possibly truss) the axles would they be able to confidently hold the weight of 40ís? I donít do any type of serious or crazy trails mostly dirt roads with light bumps, rocks, and obstacles, and it will probably stay that way for the foreseeable future. Really just want 40ís for the look and will be upgrading axles anyways as I have 37x12.50x18 Nitto Trail Grapplers on a D30 with stock gears (I know, Iíve heard all the heckling before, wasnít as educated when I made that decision as I am now) I wouldnít say Iíve babied my jeep, but I am fully aware of the consequences of this setup if I was to play too hard, but it has been doin fine for a little over 4 years now. Looking at Cooper STT pros 40x13.50x18. Any input is appreciated, and Iíll even accept the heckling and jokes that come along with it. Thanks guys.


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    Besides the possibility of spinning the rear tubes, the housings aren't the problem if you have a PR44 up front.
    It's everything else, ring gears, unit bearings etc aren't built to handle 40's.
    If it's a complete pavement princess built for looks, you could probably get away with it.
    If it ever sees dirt, rocks etc, I would highly advise against it.

    To be entirely honest, 37's with less worry of breaking shit will take you farther than babying 40's.
    I can't count the amount of times that a little throttle and a bounce or two got me out of a jam.
    That's NOT something you want to do on 40's unless you have 60's.

  5. #5
    Addict Ddays's Avatar
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    Another vote for sticking with the 37's, upgrading the front axle and wheeling with confidence. Jumping to 37's is a commitment in of itself. Going to 40's is one more level still to do it right.

    I kicked this around a year ago and actually had the form for the 60/60 package filled out but talked myself out of it. If I lived out West and could take advantage of that setup regularly I'd do it. But I sat & did an honest analysis and decided against it. Do 40's look cool? Absolutely. Would it make me a better driver? Nope. Would I be able to take advantage of that big of a tire? No, not really. The extras REQUIRED to jump to the 40 package just didn't make sense in my case.

  6. #6
    Been Around the Block RageKage's Avatar
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    40ís on a PR44?

    Thanks guys. I definitely agree sticking with 37ís is the wiser and smarter choice. And the only honest reason for 40ís is the ďcoolĒ factor. The PR44/44 is a lot easier to sell the wife on because itís ďneeded and necessaryĒ for the tires I have now. Trying to add $6k-8k to the price tag plus 40ís not to mention probably new rims if the 60/60 isnít a 5x5.5 which I donít think it is, is gunna be a lot harder to convince. Especially when I have 3 kids all under 5 years old so my wheeling time and places will be limited. Lol Either way I definitely need to upgrade my axles since I have the stock 30/44 with 3.21 gears. Thanks for helping me convince myself I donít need 40ís....... yet 🤣 plus with the money not spent on 60ís I can save it for things like an EVO sport cage and speaker upgrades. You know the necessities.


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  7. #7
    Administrator wayoflife's Avatar
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    Quote Originally Posted by RageKage View Post
    Thanks guys. I definitely agree sticking with 37ís is the wiser and smarter choice. And the only honest reason for 40ís is the ďcoolĒ factor. The PR44/44 is a lot easier to sell the wife on because itís ďneeded and necessaryĒ for the tires I have now. Trying to add $6k-8k to the price tag plus 40ís not to mention probably new rims if the 60/60 isnít a 5x5.5 which I donít think it is, is gunna be a lot harder to convince. Especially when I have 3 kids all under 5 years old so my wheeling time and places will be limited. Lol Either way I definitely need to upgrade my axles since I have the stock 30/44 with 3.21 gears. Thanks for helping me convince myself I donít need 40ís....... yet 🤣 plus with the money not spent on 60ís I can save it for things like an EVO sport cage and speaker upgrades. You know the necessities.


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    Just caught up on the thread. I think you're making a wise decision to stick with 37's. In reality, they're a great size for a JK.

  8. #8
    Nothing but a Thing Clifford33's Avatar
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    Agreed .. 37s 5.13 gears and a PR44/ Dana 44, ARBs lockers is an awesome setup. Thatís how I want to build mine.


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  9. #9
    Nothing but a Thing jdofmemi's Avatar
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    It sounds like you are making the best choice.
    I think you would be better off on 37s and learning to drive them well. There are very few places that 40s will get you that 37s won't, if you know how to choose a good line and drive your rig to it's potential.
    I have wheeled on 37s and kept up with guys on 40s and 42s, going everywhere they did.

  10. #10
    Been Around the Block RageKage's Avatar
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    Thanks again guys. Yea I definitely feel like keeping the tires I have and upgrading axles is the right and smartest choice, especially with what all the axles will have. ARB lockers, 5.13 gears, 35 spline and the front will be a PR44?! What more could I really need? Lol


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