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Running 4.56s, with 35"ers, and a 700r4 ** What about 37s?

Discussion in 'The Garage' started by NEK5, Dec 30, 2006.

  1. NEK5

    NEK5 3/4 ton status Premium Member

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    Whose doing it???


    If you are, and like it, tell me why. If you are, and don`t like it, tell me why. If you`re not, and want to, tell me why. If you aren`t, and would never do such a thing, tell me why. :deal: :wink1:
     
    Last edited: Jan 9, 2007
  2. Confedneck79K30

    Confedneck79K30 3/4 ton status

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    im not, i dont want to, but i would if i had a rig with a 700...

    3.06:1 1st in the trans
    2.1 or something low in the tcase
    4.56 in the axle..

    29:1 gear ratio? sounds good to me!
     
  3. HarryH3

    HarryH3 1 ton status Author

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    In 4th gear, cruising the highway at 65, 4.56's and 35's will be nearly identical to having 3.73's with stock 29 inch tires. 1966 RPM with 3.73's and the stock tires, 1991 RPM with 4.56's and 35's. :cool1:
     
  4. WhiteBurb

    WhiteBurb 1/2 ton status

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    I wish I had 4.56's. I just put on 35"s with my 3.73 and now can barely get into OD on the highway. Especially with the heavy burb, I think 4.56 will be perfect.
     
  5. NEK5

    NEK5 3/4 ton status Premium Member

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    this is what I wanted to hear guys...keep it coming!
     
  6. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    That's what's in my crew cab, perfect match. :thumb:
     
  7. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    I ran that exact setup for years. it's perfect. good low end power and still low rpm's on the highway.
     
  8. Mr.Jimmy

    Mr.Jimmy Registered Member

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    i have 4.10 in my jimbo. wish i had 4.88's though, my 35" tires are nice, but im goin with 38" tires, so 4.56 i think wont be enuff. on hills, my truck slows down pretty bad.
     
  9. muddybuddy

    muddybuddy 3/4 ton status

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    i used to run 3.73s and 35s and i thought that was decent. 4.56 would be really good. i was originally planning on 5.13s and 36's since u got overdrive with 700r4, but ended up going bigger. id almost suggest 4.88s simply cuz u got overdrive
     
  10. Leper

    Leper 1/2 ton status

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    Very good combo. OD will allow a very low axle gear.
     
  11. HoodRich

    HoodRich 1/2 ton status

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    Interesting, I'm finishing my rig up now with a similar combo, 4:56 700r4 40's and 208 until I can get my doubler built then out goes the 208. Only I wont be running mine on the highway.
     
  12. Col_Sanders

    Col_Sanders 3/4 ton status

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    I have a set of Yukon 4.56s for a 14sf w/ install kit I am willing to part with....
     
  13. Janitorjim8

    Janitorjim8 1/2 ton status

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    I've been running 4.56's with 35s and a 700r4 for 8 months now and love it, power off the line, good gas mileage if your easy on it because of low rpm's around town, and doesn't kill you on the highway, I can cruise at about 2200 rpms all day. i debated wheter going 4.10's or 4.56's and 4.56's was the right choice.
     
  14. k2mslskier

    k2mslskier 1/2 ton status

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    x2. Does great in my 86 with a 4" lift.
     
  15. K5Chris

    K5Chris 1/2 ton status

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    works great. i loved it. ran 4.56 and 33's for 2 years. overdrive gives you a nice crusing rpm. dont expect to cruise at 85 all day long though. i run 5.13 and 37's now, it's pretty close to the same tire/gear ratio.
     
  16. stockk5

    stockk5 1/2 ton status Premium Member

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    i ran that exact set up for a while... very good set up!
     
  17. Tominator II

    Tominator II 1/2 ton status

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    Go 36s. I went through 1 set of Hummer military 36 inchers, one set of SuperSwamper tsl 36s in my 77 Jimmy with 350/465/205/4.56. Perfect match. My latest set of tires are 38.5 groundhawgs and I could definitely stand to switch to 5.13 gears.
     
  18. 88$PIT

    88$PIT Registered Member

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    That is the way I'm going. Best utilization of gearing for wide range of use IMHO.
     
  19. NEK5

    NEK5 3/4 ton status Premium Member

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    Heres another one for ya!

    33s, 700, with 4.10s? Hows that????
     
  20. Tominator II

    Tominator II 1/2 ton status

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    3.92s or 4.10s would work great with 33s. especially with a 208.
     

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