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36 inch tires with 3;07 gears *DELETED*

Discussion in 'The Garage' started by 4x4k20, May 2, 2002.

  1. 4x4k20

    4x4k20 1/2 ton status

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    Post deleted by 4x4k20
     
  2. 70~K5

    70~K5 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    When I bought my '70 it had 3.08 gears with 12.50X15 33" and sb350/ T350. It was a dog with 33" and 3.08s.
     
  3. K5Jimmy

    K5Jimmy 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    I had 3:08 and 33's for a while after I bought my truck also.....it couldn't hardly get out of it's own way.......with 36's I'd like 4:56.......I run 33's and 4:10 now....(700R)
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: 36 inch tires with 3;07 gears

    That's nothing. I ran 35" on my '84 Blazer and it had stock 2.73 gearing!! /forums/images/icons/tongue.gif /forums/images/icons/laugh.gif
     
  5. UseYourBlinker

    UseYourBlinker 1 ton status

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    Re: 36 inch tires with 3;07 gears

    I had 33's and 3.07's for 2 years... Im gonna go 35's and 3.73 real soon.
     
  6. Pure Insanity

    Pure Insanity 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    I am not sure exactly what gear is in my rear, but by the tire size and what the tach reads at 60 I should have 3.07 or.08 and 38s. /forums/images/icons/shocked.gif I have 4.88s sitting in the box waiting to go in.

    The reason I dont know the rear gear is because I bought "a Blazer in a box". The front is the orig. stock 3.73 but the rear is unknown, till I pull them to put in the 4.88s.

    It lacks on the bottom end but not terribly bad, its drivable, but I dont have a stock motor either.
     
  7. laketex

    laketex 3/4 ton status

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    Re: 36 inch tires with 3;07 gears

    damn, and I thought i was bad at 38's and 4.10s.
     
  8. mountainexplorer

    mountainexplorer 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    I just put a set of 36" Cepeks on my '75 Blazer with 3.07's. With low tread 33's on it before, the Blazer acually did fairly well as far as power goes. With the 36's, I couldnt spin the tires at all in High range, and could barely spin them in low (and they have only 20% tread).

    Last weekend, after trying to go up a small muddy grade and failing, I could barely get it to pull itself out over a rut and back onto solid ground on the flat.
     
  9. Pure Insanity

    Pure Insanity 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    I cruise right along at 60 @ about 2000 RPM. I think. I have never been sure how fast I was going, just guessing and staying at pace w/ traffic which normally ran 60-70 on that stretch. I havent driven PI since early Jan so I am not positive on the RPM, but I am thinking it was right at 2000. Ive taken it out and played w/ it but havent really driven it.
     
  10. bigmack

    bigmack 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    Yep, I had 35x12.50's with 2.73 gears for a little while. It was terrible. I think that's what sent my transmission on its way out.
     
  11. fourwheelerjeff

    fourwheelerjeff 1/2 ton status Staff Member Moderator

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    Re: 36 inch tires with 3;07 gears

    i used to have 3.07 gears and 36's, i run in hi until i got to town, 7 miles out, and then in town i switched to lo, that way i could get out of peoples way and get around town, until one day i decided to leave it in lo on the way home, crank broke in half, it wasn't pretty
     
  12. Brady

    Brady 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    I am running 36"ers with 4:10s and don't like it.Needs more power.With 33"s it was fine.My buddy ran 34"ers on a Chevy shortbed and had to use low in the 4 speed to get it rolling.I would recomend swapping gears or running smaller tires.You will be happier all around.
     
  13. muddin4fun

    muddin4fun 3/4 ton status

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    Re: 36 inch tires with 3;07 gears

    I'm running 4.56's with my 36's and a th350. You'll burn up your tranny if you run those 3.07's with 36's very long. /forums/images/icons/frown.gif
     
  14. bryguy00b

    bryguy00b 3/4 ton status

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    Re: 36 inch tires with 3;07 gears

    well i monly 16 so im not understandin this a lthat much lolo..but the way i understand it..the bigger tires..the bigger ratio of gears you want or something?..and HP..(engine)

    Bryan-later
     
  15. muddin4fun

    muddin4fun 3/4 ton status

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    Re: 36 inch tires with 3;07 gears

    Here you go
    http://www.4lo.com/

    Just plug in the numbers you have/want and it'll give you the ratio you'll need.
    Like, enter in your desired tire diameter, desired rpm at the desired speed, enter in the t-case ratio (click it to get a list of the ratios with the t-case you have..same thing with the transmission) and it'll tell ya what you need.
    At 70, you want to be at least at 2300 rpm (IMO). The higher the rpm at the speed, the lower your gears will need to be which will give you more low end grunt. A higher gear will give you better fuel economy up to a point. Does that help?
     
  16. Pure Insanity

    Pure Insanity 1/2 ton status

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    Re: 36 inch tires with 3;07 gears

    On this page is a real simple to read chart. I prefer to use the chart personally, its easier to just look at and go across. The site also has some decent info on steering and suspension.

    http://www.superlift.com/gear.htm I linked you straight to the gear chart but you can navigate from any page on the site.
     
  17. Pure Insanity

    Pure Insanity 1/2 ton status

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    Oh BTW....Why did the original post get deleted?
     
  18. 4x4k20

    4x4k20 1/2 ton status

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    i just thought it would not get any more responces and i have decided to go with some 8lug running gear
     
  19. Pure Insanity

    Pure Insanity 1/2 ton status

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    Oh Ok. I was just wondering. Normally a post doesnt get deleted unless it gets ugly. LOL!
     
  20. bryguy00b

    bryguy00b 3/4 ton status

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    Re: 36 inch tires with 3;07 gears

    k..i think i get it a little better now..so you would like adjust the rpm to match wiht your gears?

    Bryan- p.s- the link does not wrok /forums/images/icons/frown.gif
     

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