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.

4:56's too low for street?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by jtpepper, Sep 22, 2002.

  1. jtpepper

    jtpepper Registered Member

    Joined:
    Jun 4, 2002
    Posts:
    43
    Likes Received:
    0
    Location:
    LOCKHART,TEXAS
    4:56\'s too low for street?

    I just shelled the pinion in my 10 bolt and I'm thinking of going to 4:56's.My ? is; are the 4:56's too low for the street and what rpm will I be turning?My set-up is as follows;83 Jimmy,350/700r4,10 bolts,33" bfg's.Will be going to 36" later on.Any help is greatly appreciated.GOD Bless,jtpepper
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    2,406
    Likes Received:
    1
    Location:
    Dumont NJ 07628
    Re: 4:56\'s too low for street?

    <font color="blue">It might be a littler higher on the highway (personally I like it a little extra RPM to help push these barn doors rolling on huge heavy tires), but tollerable. You will definetly want the 4.56s with the 36" tires
     
  3. outlaw612

    outlaw612 1/2 ton status

    Joined:
    Feb 11, 2001
    Posts:
    2,342
    Likes Received:
    0
    Location:
    Springfield, Illinois
    Re: 4:56\'s too low for street?

    Im gonna be running 4.56's and 36" tsl's. Highway with a 700r4 should be about 2200rpms
     
  4. BigOrange90Jimmy

    BigOrange90Jimmy 1/2 ton status Premium Member

    Joined:
    May 24, 2002
    Posts:
    2,923
    Likes Received:
    0
    Location:
    Wilmington, NC
    Re: 4:56\'s too low for street?

    yes, go with the 4.56's on the street with the 36's.
     
  5. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,454
    Likes Received:
    493
    Location:
    my garage, Henderson, NV
    Re: 4:56\'s too low for street?

    yeah i have 36s and i have a set of 4.56s in my closet ready to install, i can't wait.
     
  6. jtpepper

    jtpepper Registered Member

    Joined:
    Jun 4, 2002
    Posts:
    43
    Likes Received:
    0
    Location:
    LOCKHART,TEXAS
    Re: 4:56\'s too low for street?

    Thanx guy's.I forgot to mention that it is NOT a daily driver.Strictly play toy,(huntin' buggy).I was thinkin' it would be alright especialy since my engine is built for max power from 1800-6500 rpm's.Should be a big change from the stock 3:42's that are in it.I might be able to white smoke em'.Whataya' think? GOD Bless,jtpepper
     
  7. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
  8. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

    Joined:
    Dec 14, 2001
    Posts:
    22,063
    Likes Received:
    71
    Location:
    Pleasanton, CA.
    Re: 4:56\'s too low for street?

    You might want to reconsider that gear ratio in a 10 bolt axle. 4.56's in a 10 bolt make the pinion gear pretty small and ready to explode at any given time. Just my $.02
     
  9. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    Re: 4:56\'s too low for street?

    Good point, that is pretty much getting to the limit of a C10 pinion...
     
  10. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    Re: 4:56\'s too low for street?

    Depending on how much you're willing to spend, 4:88's in a 14 bolt FF and Dana 60 with 38" tires sounds like alot of fun to me.
     
  11. txbluethunder

    txbluethunder 1/2 ton status

    Joined:
    Jan 29, 2002
    Posts:
    835
    Likes Received:
    0
    Location:
    Austin, TX
    Re: 4:56\'s too low for street?

    i've been running that gear for about two months now and love it. i cruise around 2200 rpm in over drive at 70mph and it wonderful. i wouldn't say its too low at all.
     
  12. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    Re: 4:56\'s too low for street?

    4.56 in a 10 bolt is pusshing the strength a ways in my opinion....

    It'll probably be fine... lotsa guy's here run it i'm sure... But it's gotta weaken, or thin, the gears...
     
  13. chevrolet21

    chevrolet21 Registered Member

    Joined:
    Dec 21, 2001
    Posts:
    59
    Likes Received:
    0
    Location:
    WARNER ROBINS, GEORGIA
    Re: 4:56\'s too low for street?

    i RUN 4:88'S IN MY 10 BOLT WITH 39.5 TSL'S FOR THE LAST YEAR AND HAVE NO PROBLEM. i'M NOT OUT ROCK CRAWLING OR ANYTHING THOUGH. IF YOUR CAREFUL YOU'LL BE JUST FINE
     
  14. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    Re: 4:56\'s too low for street?

    </font><blockquote><font class="small">In reply to:</font><hr />
    I might be able to white smoke em'.

    [/ QUOTE ] Smokin' 36's with a set of 4.56's in a 10-bolt is a sure-fire recipe for disaster. /forums/images/icons/shocked.gif /forums/images/icons/frown.gif But then, I'm the guy that busted a couple of teeth off of a 3.42 pinion behind the weak 4.3L V6 in my S-Jimmy, on 30x9.50's. /forums/images/icons/shocked.gif You'll be able to see the difference in the beef of the pinion once you have the 4.56's next to the 3.42's. Years ago I had a '77 K5 with a 12-bolt running 4.10's and 35's that got lit up rather frequently. I broke teeth off of the ring gear 3 times in 3 years. Guess why I put a 14-bolt under the next one I bought! /forums/images/icons/wink.gif
     

Share This Page