Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

ratios

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 4x4k20, Aug 26, 2001.

  1. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    anyone running different ratios in there 4x4s if so what the closest you can run

    4x4k20
     
  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Do you mean a different ratio in the front and back? As far as I know, you can't........



    <font color=blue> MEAN DAD WITH TWO BAD KIDS<font color=blue>
     
  3. DesertDueler

    DesertDueler 1/2 ton status

    Joined:
    May 23, 2001
    Posts:
    3,106
    Likes Received:
    0
    Location:
    Phoenix, AZ
    I belive you can only go 10 percent on the differnet ratios. Like 4.10 and 4.09, or 3.40 and 3.42, or 3.70 and 3.73. Hope that helps. You could get away with more if you only used 4 wheel drive in heavy mud where there is no traction. If you used say 4.10 in the rear and 3.73 up front and used it on hard packed dirt you will destroy the transfer case very quickly.

    86 Jimmy 4"lift 35"MTRs locked front.Other cars 69 Firebird w/525 hp,and 70 GTO <a target="_blank" href=http://www.geocities.com/modifierperformance>MY vehicles</a>
     
  4. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    yes' i here that some people do like run 410 rear with 373 front just wondering if anybody here runs different ratios like this with any problems

    4x4k20
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,180
    Likes Received:
    1,388
    Location:
    E-town baby!
    Not recommended unless you like very deep mud.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  6. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Yup 10% is the is the biggest axel ratio difference you can go without causing damage to most transfer cases.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze>http://coloradok5.com/gallery/Thunders-Blaze</a>
    <font color=orange>Charter Member of The Too Much Fun Club</font color=orange>
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,684
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    That advice also assumes that you are running the same size tire on both the front and rear of the vehicle. I think there was some kind of pink-colored hybrid truck in one of the magazines (possibly a TTC applicant?) that ran different gear ratios front and rear, but also had substantially smaller tires up front.....that's how he was able to get away with it.

    -Greg72
     
  8. 6.2Blazer

    6.2Blazer 1/2 ton status

    Joined:
    Feb 24, 2000
    Posts:
    4,675
    Likes Received:
    26
    Location:
    Ohio
    10 percent ????!!!!!!

    Do you realize that would be like running 4.10's on one end and 3.73's at the other!!! I don't think that would be recommended.

    Maybe you are thinking of 1%, which would be more like the difference between 4.09 and 4.11 gears.
     
  9. txbartman

    txbartman 1/2 ton status

    Joined:
    Jun 1, 2001
    Posts:
    1,975
    Likes Received:
    0
    Location:
    Plano, TX
    10%?!? You guys gotta be kidding me! According to most sources, 1-2% variance is about all you can do safely. For example, 4.09 front and 4.11 rear. That is [((4.11/4.09)-1)*100] 1/2% difference. 4.10 in one axle and 3.73 in another is [((4.10/3.73)-1)*100] 9.92% variance.

    According to www.ring-pinion.com, 1-2% is the most difference you can safely run.

    As far as the 1-2% variance or the difference in gears brekaing the tcase, you guys need to check out this article &gt;&gt; <a target="_blank" href=http://www.ring-pinion.com/t-myths.html>Myths about Diffs</a>. It will make many things a little clearer.

    Brian
    Click to see <a target="_blank" href=http://tx85gmcguy.alloffroad.com> My 85 Jimmy </a>
    Who put a stop payment on my reality check?!?
     
  10. Emmettology 101

    Emmettology 101 3/4 ton status

    Joined:
    May 9, 2000
    Posts:
    8,126
    Likes Received:
    0
    Location:
    FL
    I run a 4.09 front with either a 4.10 or 4.11 rear.(cant rememebr it has been a while) I have no problems, but that is pretty close and how mot come from the factory.

    Mike

    <font color=green>"It's like a sore dick deal, You cant beat it!"</font color=green>

    <a target="_blank" href=http://www.geocities.com/emmettology101>www.geocities.com/emmettology101</a>
     

Share This Page