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Guys Running 3.73's

Discussion in 'Early CJ5 and CJ6 Tech' started by justin_bongo, Jan 30, 2019.

  1. justin_bongo

    justin_bongo Member

    How tall of a tire are ya'll running?


    I have a 71 with 231OF, T14, D18, D27, D44F, and am trying to see if i can get away with a lift and taller/ bigger tires, or need to just keep it stock height.

    Thanks,
    Justin
     
  2. ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    33s are about the limit IMO. It's an overall happy combination with the v6, but you'll probably be downshifting up hills.
     
    jhuey, wheelie and TIm E like this.
  3. TIm E

    TIm E Aggressively average

    Before starting my rebuild, my 68 had basically your same set-up except with the original Dauntless 225 odd-fire running 3.73's and BFG KM2 33x10.50 tires and 2 1/2" lift. No real issues or complaints...a very driveable set-up, although you will give up a bit in off-road ability and crawl ratio. I am going with the same set-up in the rebuild if that is any indication.

     
    justin_bongo, ITLKSEZ and Rich M. like this.
  4. Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    the bigger the tire = less turning radius . I did the 33's once :D till they wore out
     
  5. Mcruff

    Mcruff Earlycj5 Machinist

    D00F251D-A2E4-41B2-ABF8-EF654E30923A.jpeg I have a 3.73 gears with 31x10.50 tires and a 2-1/2” lift. Works well for what it is.
     
    justin_bongo, Rich M. and Bowbender like this.
  6. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    I ran 33x 9.50s with 3.73s for a while. Ok on the road but couldn't go slow enough off road s lot of times. Seemed like I was always on the brakes trying to slow it down. Wet drum brakes were the worst. Running 4.88 now but haven't wheeled it since. Good on the road but an OD would make it ideal.
     
  7. justin_bongo

    justin_bongo Member

    Thanks for the insite guys.
    I think i'm gonna have to bit the bullet and order wider wheels.
    Tall tire sizes are like hens teeth these days.
     
  8. Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    I don't have any real on the road experience but I'm going to run 33s with 3.73 and v6.
    I thought I once read here about an "under-drive" ? That would be good for me as I do plan on putting a good part of my miles off road.
     
  9. ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    I saw years ago where somebody converted the low range unit from a quadratrac to fit in a D18 where the OD usually goes. I think it was on pirate. Definitely a custom, 1-off unit.
     
    Buildflycrash likes this.
  10. ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

  11. y2grey

    y2grey Member

    I run 35s with 3.73s. Downshifting on hills or long grades is a way of life. It was still an issue with 33s. We'll be going to 4.27s on the next round.
     
  12. zinertia2

    zinertia2 "and which part are you keeping?" 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Y2grey

    I don’t remember which ratios are available for each axle but isn’t 4:11 the next down?

    What RPM are you at for 60 or 65?

    Trying to pick my ratio!:)

    Dennis
     
  13. y2grey

    y2grey Member

    2100+ at 60, 2300+ at 65. That's in the flat, she loses too much on grade. I already have the 4.27s which would give me another 300 or so RPM at speed.
     
  14. zinertia2

    zinertia2 "and which part are you keeping?" 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Y2grey
    Thank you!
    Dennis
     
  15. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    No 4.11 for the Dana 25/27 AFAIK. 3.73, 4.27, 4.88, 5.38