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Gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Z3PR, May 17, 2002.

  1. Z3PR

    Z3PR Banned

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    I'm going to use 35" tires. My Blazer has a 400 cid small block, and a TH350 tranny, and fulltime T-case. What would be the best gears for trails ????? I live in small mountins. I still want to be able to go down the highways with the flow of traffic, but don't want my truck to be a pooch off road. What do ya'all recomened for gears ???????
     
  2. Z3PR

    Z3PR Banned

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    I need a recomendation
     
  3. mudrunner78

    mudrunner78 1/2 ton status

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    I ran 4.10s with your combo and really enjoyed them. Jesse
     
  4. HarryH3

    HarryH3 1 ton status Author

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    I've got a TPI 383, Turbo 400, 4.10's and 35 inch BFG Muds. I'm pretty happy with how it goes, on road and off. If it had an overdrive, then I think 4.56's would be a better choice.
     
  5. Z3PR

    Z3PR Banned

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    The local 4X4 shop is recomending 4:88's with a Detroit locker in the rear. They'll do a package deal of (6" lift with ORD shakle flip and greasable bushings, and all releated parts, the gears Locker and rebuild of axles) "I forgot price quoted, but the pakage deal was alot cheaper then I could buy the components for it on myown."
     
  6. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    yikes... 4.88s? I dunno about a shop that would recommend gears that low on a rig that WILL see hwy miles. I run 35s (for now!) with 4.56s... but I only went that low because I have OD... 4.88s would be pushing it IMO. One thing to consider is that if you went with 4.10s.. you wouldn't have to replace your stock carrier... if you go 4.56s or higher you would.

    J
     
  7. Blazinaire

    Blazinaire 1/2 ton status

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    I have 35''s and 4.56's and overdrive. It is as low as I would want to go on road even with overdrive. For you I would go with 4.10's for sure. Weren't you talkin about switching to a 14 bolt? A lot of them come with 4.10's from the factory, so you could actually save some money by just putting the 14 bolt in and just regearing the front (and converting to 8 lug)
     
  8. Rebel88

    Rebel88 1/2 ton status

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    amen to that...i have 4.88s with an overdrive tranny but im running 39 boggers...so its the appropriate amount of gearing for my setup

    Later
     
  9. TXsizeK5

    TXsizeK5 1/2 ton status

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    Since you arent running over drive and i assume you're 400 has some good *Umph* i would go 4.10 unless you plan on going bigger in the future. If you KNOW you are going bigger go with atleast 4.56 now so you dont have to change gearing later
     
  10. Z3PR

    Z3PR Banned

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    I plan on some 38's or 39's next year.
     
  11. topless1tonk5

    topless1tonk5 Registered Member

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    gear it deep, i run 5:29's and 33's on my daily driver 4runner and i drive 1 hour on the freeway each way to work. i running 5:13's in my k5 with 38.5's and an 7oora, i would go deeper if they made them for a 14bolt. go as deep with gearing as you will ever think you will need because you will ALWAYS want to go bigger!
     
  12. m j

    m j 1/2 ton status

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    gear ir for hiway and doubler it for off road
     
  13. Pookster

    Pookster 1/2 ton status

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    yeah, what I was about to say too! Course, doesnt that put a lot more pressure on the spider gear?
     
  14. bryguy00b

    bryguy00b 3/4 ton status

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    what exactly does a double do..double your gear ratio or something?

    Bryan-later
     
  15. ramjet gmc

    ramjet gmc CK5 Staff Staff Member Moderator GMOTM Winner

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  16. bryguy00b

    bryguy00b 3/4 ton status

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    ahhh ok..thanx...
     
  17. MudbogAD

    MudbogAD 1/2 ton status

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    If you are gonna be running 38's or 39's in the future, DEFINITELY go with 4.56's. IMO 4.56's and 35's ain't really that bad at all, even without an overdrive. I think 4.56's and 35's now is much better than ending up with 39's and 4.11's in the future. You don't have to get a new carrier either because they make the wide ring gear for almost all the applications.
     

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