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4.56, 4.88, or 5.13?

Discussion in 'The Garage' started by Citizen Rider, May 30, 2006.

  1. Citizen Rider

    Citizen Rider 1/2 ton status

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    What do you think? Everyone i wheel with runs 4.56 and does really well. This includes trucks on 42's, 39.5's, and 37's. My blazer is going to be down for a lil while as the transmission gave out for the 3rd or 4th time since its rebuild in feb. So while its down im going to throw a 14ff in the rear so i can stop worrying about that 10b.

    I have a 350, TH350, NP203, and 38" TSL's. I still drive this on the road and gets me to where we wheel and back. I plan to go bigger tires far later in the blazers life, but right now 38's are perfect.

    What would be best for offroad but still do alright onroad also?:confused:
     
  2. RGV72BLAZER

    RGV72BLAZER 1/2 ton status

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    i'd go with 4.88s...especially if you're considering going to a larger tire down the road
     
  3. sweetk30

    sweetk30 professional hooker Premium Member

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    4.88 or bigger. but with no over drive 4.88 be my choice .
     
  4. rdn2blazer

    rdn2blazer 1 ton status Premium Member

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    4:88's is the sweet spot.
     
  5. mostwanted

    mostwanted 1/2 ton status

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    4.88's is what I am planning to run. 4.88 would be a power gear for 35's, a good stock type gear for 36-37- and 38's and a milage geer for 39-42.
     
  6. ivie29

    ivie29 1/2 ton status

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    I smoked 4 trannies 1 year with 4.10s and 44 inch tires.Then I switched to 4.88s and 39s.This works very well and I could easily run 42s if I wanted to.
     
  7. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    5:13's hands down:bow: :bow:
     
  8. K5er4Life

    K5er4Life 1/2 ton status

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    true that, me love my 5.13 on 38's. just dont plan to go over 60mph. :haha:
     
  9. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    there is only one gear option in non-rockwelled rigs, and it is 5.13s. I paid good money to go 4.56 and have felt like an idiot for doing so ever since. lol!

    j
     
  10. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    I like my 5.13s.
     
  11. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    really I love my 4.56's... next is overdrive.. (nv4500 someday...)I have yet to be underpowered.. well let me clarify....

    if you are underpowered... gears only assist in a different area... tired motor or lack of hp could also result in needing steep gears....
    that was my case... I was crankin 195hp/295lb ft torque... now im in the 300+hp range and dont know about torque... :bow:
     
  12. cbbr

    cbbr 1 ton status GMOTM Winner

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    I have am going to 4.56 and 37's soon. I have a TH400 and still see lots of highway on the way to everywhere.
     
  13. mouse

    mouse 1/2 ton status

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    4.88's with 36 inch Iroks (measure close to 37). It has great power and low range, but I wont drive it over 60 with the TH350 trans.
     
  14. Leper

    Leper 1/2 ton status

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    I run 39.50 with 4.56 and hate it! My stock tbi motor doesn't have the balls to push the truck in overdrive anyway. I need to run a BB454 or regear my stuff to 5.13. I am waiting now to decide if I want to bite the bullet and go rocks. If I were you, I would run the 5.13 , that way, later, when you go to 42s, your gears will be happy.
     
  15. SubYuman

    SubYuman 1/2 ton status

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    Here's a thought....

    Toss out that POS TH350 and get a TH 400 or better, find a good used 4L80E!!!
    I am in the planning stages of rebuilding my 80E with a lower first 2.75 instead of 2.48 and lower second gears (which you can get for the 400 also) and running 4.56 or 4.88 on 37's.
    You'd stop the breakage altogether and with a lower R&P, save a few gallons to the mile.... I should know, I get 13 on the highway, but 9 in town..better than the 6 I got with my 79!!
     
  16. mouse

    mouse 1/2 ton status

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    Although the 400 is much stronger than a TH350, it does take more HP to spin. If you're running a mild 350 engine, the TH350 should survive. Plus they are cheap and easy to rebuild. Of course my confidence may be better than some, due to the fact that I have a good spare sitting around.
     
  17. mouse

    mouse 1/2 ton status

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    I might go to 39.5 Iroks (in a year or two), but I don't want to regear from 4.88's. They're not even broke in yet.
     
  18. sandawgk5

    sandawgk5 3/4 ton status

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    I have overdrive and run 4.10 with 37s which is pretty much the same as 3.08s and 31s which sucks. When I regear it will be 5.13s:D . I plan on fodeetoos in the future:D .

    Ira
     
  19. atho

    atho 1/2 ton status

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    I too am caught in this decision. I can either do 4.57 or 5.14 in the Eaton rear I have, because there is no 4.88 for it and also because I have both of those gearsets.

    I figure that everyone who wheels wants to go bigger tires, so I might as well go 5.14 now and skip the 4.57. 5.13 gears for the D60 cost a tad more, but who cares.

    I don't think it will be that bad, I calculate about 2500 rpm at 55 mph with 38's or thereabouts. Thats about what RPM i ran on the hwy before lift.
     
  20. muddybuddy

    muddybuddy 3/4 ton status

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    ive got 5.13s with 42's and i love them! if you are going to pay the money to regear, over compensate that way if you do go bigger, you will already be set instead of needing to regear again. also saves $$$$.
     

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