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Largest tires with 3.07 gears?

Discussion in 'TJ Wheels & Tires' started by Cal, Jul 24, 2018.

  1. Cal

    Cal Member
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    Haha! Fuck if I know! How do I find that out? Excuse the ignorance.
     
  2. Cal

    Cal Member
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    Thanks dude! Yea I’m just going to stick with my 31s until I can do a proper build for the “look” I’ve wanted since I was a teenager. I use to have a 98’ Sahara when I was 18 and bought 33” LTBs and was going to buy a 4” Superlift when a guy pulled out in front of me causing it to flip 4x so now i found an 01’ that I’m going to have some fun with and want to attempt to recreate what I wanted back then but I’ll just have to be patient. Buy some gears, a nice lift and maybe another set of Swampers or Baja Claws. Sorry for the novel.
     
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  3. billiebob

    billiebob TJ Addict

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    You don't know if it shifts twice? 3spd auto, or three times, 4spd auto ?
    Or, look at the console.
     
  4. Cal

    Cal Member
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    It’s an 01’ so it’s a 3 speed auto.
     
  5. CasperLLY

    CasperLLY New Member

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    For those with 3.07 gears and 32" tires. What are your rpms at let's say 65mph

    Sent from my SM-G950U using Tapatalk
     
  6. billiebob

    billiebob TJ Addict

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  7. CasperLLY

    CasperLLY New Member

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    I have and by that it say I would be closer to 3.55 gear. I run about 1900 rpm at 65. Just asking around for research

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  8. billiebob

    billiebob TJ Addict

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    do the string test and measure what your ratio is
     
  9. dla

    dla TJ Enthusiast
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    Three speed auto with 3.07's and 33's was 2000 rpm at 65 mph, you would see about 2100 on your 32's.

    Now with 4.10's 2750 rpm at 65 mph.
     
  10. CasperLLY

    CasperLLY New Member

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    I forgot to mention I have a 5 speed manual

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  11. billiebob

    billiebob TJ Addict

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    So you will get the same RPM/MPH is 4th as the 3speed automatic in 3rd.
     
  12. Commbubba19

    Commbubba19 New Member

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    as long as it's 1:1. if 3rd gear in the 3spd is 1.00 and 4th in the 5spd is 1.00 and they both have the same final drive ratio of 3.07 then yes, you'd be spinning the same rpm with the same tire height. only difference is an auto can unlock the converter and gain a bit of rpm if needed before downshifting under load.
     
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  13. JeepNWilly

    JeepNWilly Jeep Addict
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    On my 2006 TJ I ran 35's with 3.07 for about 6 months or so until I got my new axles. I used 33's on it for about 3 to 4 years. I wheeled it and daily drove it but I could only use 4low when wheeling. My TJ has the 6 speed manual so 6th was no usable at all. I love my now 4.88 with my 35's.
     
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  14. jeepersoutpost

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    I have ran 3.07 on 33x12.5r15 for over ten years with an auto, mainly because I’m too cheap to regear! I have no problem, but don’t tow. It does have to shift down going up hill, and I rarely drive faster than 70 mph.


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  15. Matt77

    Matt77 TJ Enthusiast

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    My 98 sahara is a 5 speed runs 33 12.5 R15 on stock d35/ d30. Ran like a top back in the day. Highway and mudding. Of course I had to downshift going up hills. I think regearing and heavy axles is only needed for serious off roading. Otherwise your just playing. If your mostly highway driving you don't need it. However I haven't towed my boat with it too much. So I don't know if heavier gears would help.
     
  16. CasperLLY

    CasperLLY New Member

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    My 99 Sahara on 32 and 3.07 gears
    4th gear and 5th e392003e62ac3e16e3613d35214587dd.jpg f93c432c5fb10202b88a224a67517351.jpg

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  17. Tony13

    Tony13 New Member

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    im running 33s (285s) more like 32.8" with 307s on an auto 3spd, overall acceleration is ok and I can set cruise at 70/75mph no problem, I don't think its that bad but id like to regear eventually.
     
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  18. Daz7

    Daz7 TJ Enthusiast
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    I've just changed from a 265 to a 285 tire, so 32" to 33" and have standard gearing. On a 6 speed 4.0 even with the 32's you lose 6th gear, which is ok. I was pretty happy with the drive and never really felt that I needed to alter gearing apart from low 1st gear not being as low as it should be.
    With the 33's, I now need to alter gearing and felt the need as soon as they were fitted. It's livable but you'll have a much nicer drive with a smaller tire.
     
  19. Scott Davidson

    Scott Davidson New Member
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    I have a 2000 automatic and run 33 x 12.50 BFG's with 3.07 gears i get 16 mpgs and just a little start off power loss. I have plenty of power to take off at red lights and keep up with folks. It will run 70 or 80 on the expressway and no loss of power like straight shifts. Love mine
     
    #39 Scott Davidson, Aug 11, 2018 at 12:41 PM
    Last edited: Aug 12, 2018 at 11:11 AM
  20. JC123

    JC123 New Member

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    Scott, is yours lifted at all? I'm a new member and waiting for my first jeep to arrive. I'm curious to learn if the 33s cause any problem on a stock TJ (with tire rubbing, gearing, etc.).
     

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