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 and 35's???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by AK-5GUY, Feb 24, 2003.

  1. AK-5GUY

    AK-5GUY Registered Member

    Joined:
    Apr 24, 2002
    Posts:
    89
    Likes Received:
    0
    Location:
    Greensboro, North Carolina
    4.56 and 35\'s???

    I have a 1987 blazer with a tbi 350 and 700R4. I am about to buy a 14 bolt ff with 4.56's and hope to put 35's on it soon. My front axle is a 10 bolt with 3.42's. If anyone has a 10 bolt front for sell with 4.56's for around 200 I will take it (will pay shipping).
    My question is: I will be using this truck as a daily driver back and forth from highschool, and also for some short four wheeling trips (around 60 highway miles or so). Will the 4.56's and 35's be an economical combination in town? Will they be economical on the highway? I understand that they will have a lot of power, but will they be overkill for in town driving, and/or highway? I will run 35's for a while untill I can afford 37's or so along with my insurance, maintainance, and school. How will 37's and 4.56's do also?
    Any information will be greatly helpful. Thanks.
    Harrison
     
  2. AK-5GUY

    AK-5GUY Registered Member

    Joined:
    Apr 24, 2002
    Posts:
    89
    Likes Received:
    0
    Location:
    Greensboro, North Carolina
    Re: 4.56 and 35\'s???

    Also, will I have to replace the carrier on the front 10 bolt with 3.42's to put in 4.56's myself? Thanks
    Harrison
     
  3. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    Re: 4.56 and 35\'s???

    i am running 35s and 456s with a turbo 400 and i dont like it as far as having to drive it everyday.. i would go to 410s if you plan on it being your daily driver.. and also you will need a different front carrier for the 456s.
     
  4. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    Re: 4.56 and 35\'s???

    You should be fine. I am running 32's and 4.56's right now. With the carb 350 & 700R4 I get decent economy on the highway, and a little worse around town. I wouldn't go with any less gear then 4.56's if you have a 700R4. With the OD & 35's you will turn 2100ish at 65 most likely. I turn 2600 at 65, and as long as I don't push it up past that much I get 10-12 mpg. My truck only got 13 on highway with 3.73's so I only lost 1-2 mpg, but when I get my 35-37's I will get some of that back probably.

    Intown you will hurt a little more, but it isn't terrible.
     
  5. outlaw612

    outlaw612 1/2 ton status

    Joined:
    Feb 11, 2001
    Posts:
    2,342
    Likes Received:
    0
    Location:
    Springfield, Illinois
    Re: 4.56 and 35\'s???

    Im running 36's and 4.56's and I love it. Ive also got a 700r4. I almost wish I has gone 4.88's.
     
  6. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    Re: 4.56 and 35\'s???

    Ya, I am thinking the same thing. When I get my 37's (a long way away) I will be back to almost stock gearing. If the 10bolt front would take 4.88's (it will, but the pinion gets really small) and I had it to do over I would go 4.88's or 5.13's.
     
  7. Blazinaire

    Blazinaire 1/2 ton status

    Joined:
    Mar 17, 2002
    Posts:
    1,262
    Likes Received:
    0
    Location:
    Santa Maria, CA
    Re: 4.56 and 35\'s???

    I get 18mpg (highway) with tbi350/700/4.56/35'' and it is tolerable on the highway if you don't plan on going fast /forums/images/graemlins/wink.gif. As for the front carrier, there is only 1 carrier break in 10 bolts and it is something like 2.73-down and 3.08-up so no you DO NOT have to change carriers, I swapped the 3.42's in my front 10bolt to 4.56's with the same carrier and they were NOT thick gears /forums/images/graemlins/thumb.gif
     
  8. AK-5GUY

    AK-5GUY Registered Member

    Joined:
    Apr 24, 2002
    Posts:
    89
    Likes Received:
    0
    Location:
    Greensboro, North Carolina
    Re: 4.56 and 35\'s???

    Well it sounds like a good choice to go with the 4.56's with the 700R4. Thanks a lot guys.
    Hey, does anyone have a front 4.56 8 lug axle for around 200 so i dont have to do the ring and pinion myself? /forums/images/graemlins/wink.gif Almost sounds to complicated to me! Thanks
    Harrison
     
  9. TXsizeK5

    TXsizeK5 1/2 ton status

    Joined:
    Aug 26, 2001
    Posts:
    2,518
    Likes Received:
    0
    Location:
    College Station, TX
    Re: 4.56 and 35\'s???

    I wouldn't suggest doing it yourself unless you're very mechanically inclined. Its a touchy process and if you mess it up or do it wrong... say bye bye to your ring*pinion maybe more.
     
  10. AK-5GUY

    AK-5GUY Registered Member

    Joined:
    Apr 24, 2002
    Posts:
    89
    Likes Received:
    0
    Location:
    Greensboro, North Carolina
    Re: 4.56 and 35\'s???

    Yeah, that's what I was thinking. Now all I need to do is find a 4.56 8 lug front axles for 2-300. HMMM /forums/images/graemlins/confused.gif
    harrison
     
  11. fourwheelerjeff

    fourwheelerjeff 1/2 ton status Staff Member Moderator

    Joined:
    Nov 16, 2001
    Posts:
    3,419
    Likes Received:
    6
    Location:
    meadow, tx; in the boonies
    Re: 4.56 and 35\'s???

    it would be a good choice, i am considering doing this to my 88, especially since you have the 700 with the overdrive, all 10 bolt with the 8.5 inch ring gear use the same carrier from 2.73 and up, so you will not need a new carrier unless you want a full case locker like arb or detroit; you can use the same carrier and use a lock right or e-z locker /forums/images/graemlins/thumb.gif
     
  12. Highlander

    Highlander 1/2 ton status

    Joined:
    Nov 25, 2000
    Posts:
    1,204
    Likes Received:
    0
    Location:
    Lakewood Colo
    Re: 4.56 and 35\'s???

    You can find just the front huds from about 150 and up or hit the local junk yards and look for a 3/4 ton 8 lug and just bolt it in. But then it will be hard to find one with 4.56's So you mite have to wait around the for sale area and someone mite have one.
    Didn't you say you we're in High school? Are you taking Auto Shop? That would be a great shop project.


    Eric
     
  13. AK-5GUY

    AK-5GUY Registered Member

    Joined:
    Apr 24, 2002
    Posts:
    89
    Likes Received:
    0
    Location:
    Greensboro, North Carolina
    Re: 4.56 and 35\'s???

    I wanted to take auto shop untill I found out that they were not going to offer it any longer! /forums/images/graemlins/shocked.gif
    I'll look around on here for the front. Let me know if you guys find what im looking for. Thanks for all the help.
    Harrison
     
  14. new2k5

    new2k5 1/2 ton status

    Joined:
    Dec 16, 2002
    Posts:
    128
    Likes Received:
    0
    Location:
    south eastern PA
    Re: 4.56 and 35\'s???

    it would be easier but more expensive to find a 60 with 456's thats what i'm puttin in mine
     
  15. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

    Joined:
    May 19, 2001
    Posts:
    45,030
    Likes Received:
    363
    Location:
    Vancouver, WA, USA
    Re: 4.56 and 35\'s???

    Ive had 4.56s, 35s, and a 700r4 for years now, works great. RPMs on the freeway arent to bad with OD. Unless you like to drive ur rig 95 mph all the time, I'd go 4.56 if I was you.

    j
     

Share This Page